Merge branch 'master' of ettus.sourcerepo.com:ettus/uhdpriv into usrp2p

Conflicts:
	host/lib/usrp/usrp2/CMakeLists.txt
	host/lib/usrp/usrp2/mboard_impl.cpp
	host/lib/usrp/usrp2/usrp2_regs.hpp

172 files changed, 17955 insertions, 194 deletions

diff --git a/firmware/fx2/.gitignore b/firmware/fx2/.gitignore
new file mode 100644
index 000000000..affc0b779
--- /dev/null
+++ b/firmware/fx2/.gitignore
@@ -0,0 +1,30 @@
+/Makefile
+/Makefile.in
+/aclocal.m4
+/configure
+/config.h.in
+/stamp-h.in
+/libtool
+/config.log
+/config.h
+/config.cache
+/config.status
+/missing
+/stamp-h
+/stamp-h1
+/.la
+/.lo
+/.deps
+/.libs
+/*.la
+/*.lo
+/autom4te.cache
+/*.cache
+/missing
+/make.log
+/usrp.pc
+/INSTALL
+/config.guess
+/config.sub
+/install-sh
+/ltmain.sh
diff --git a/firmware/fx2/AUTHORS b/firmware/fx2/AUTHORS
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/firmware/fx2/AUTHORS
diff --git a/firmware/fx2/COPYING b/firmware/fx2/COPYING
new file mode 100644
index 000000000..94a9ed024
--- /dev/null
+++ b/firmware/fx2/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/firmware/fx2/ChangeLog b/firmware/fx2/ChangeLog
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/firmware/fx2/ChangeLog
diff --git a/firmware/fx2/Makefile.am b/firmware/fx2/Makefile.am
new file mode 100644
index 000000000..9c0da3573
--- /dev/null
+++ b/firmware/fx2/Makefile.am
@@ -0,0 +1,22 @@
+#
+# Copyright 2003 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+SUBDIRS = include lib src
diff --git a/firmware/fx2/Makefile.common b/firmware/fx2/Makefile.common
new file mode 100644
index 000000000..fb83b9470
--- /dev/null
+++ b/firmware/fx2/Makefile.common
@@ -0,0 +1,122 @@
+# -*- Makefile -*-
+#
+# Copyright 2004,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+AM_CFLAGS = @autoconf_default_CFLAGS@ @lf_CFLAGS@
+AM_CXXFLAGS = @autoconf_default_CXXFLAGS@ @lf_CXXFLAGS@
+
+# Sets ABI version in SONAME and appends -LIBVER to filename
+LTVERSIONFLAGS = -version-info 0:0:0 -release $(LIBVER)
+
+# includes
+grincludedir = $(includedir)/gnuradio
+
+if PYTHON
+# swig includes
+swigincludedir = $(grincludedir)/swig
+
+# Install the gnuradio stuff in the appropriate subdirectory
+# This usually ends up at:
+#   ${prefix}/lib/python${python_version}/site-packages/gnuradio
+
+grpythondir = $(pythondir)/gnuradio
+grpyexecdir = $(pyexecdir)/gnuradio
+
+# Install the non-gnuradio usrp stuff in the appropriate subdirectory
+# This usually ends up at:
+#   ${prefix}/lib/python${python_version}/site-packages/usrpm
+
+usrppythondir = $(pythondir)/usrpm
+usrppyexecdir = $(pyexecdir)/usrpm
+endif
+
+# gcell includes
+gcellincludedir = $(includedir)/gcell
+gcellspuincludedir = $(includedir)/gcell/spu
+
+# Cell spu libs
+libspudir = $(libdir)spu
+
+# This used to be set in configure.ac but is now defined here for all 
+# Makefiles when this fragment is included.
+STD_DEFINES_AND_INCLUDES = $(DEFINES) $(BOOST_CPPFLAGS) \
+	$(GNURADIO_INCLUDES) $(GRUEL_INCLUDES)
+
+# when including for compilation from pre-installed libraries and such,
+# need to make sure those are put last on the compile command
+WITH_INCLUDES = @with_INCLUDES@
+WITH_SWIG_INCLUDES = @with_SWIG_INCLUDES@
+
+# Where to find gnuradio include files in the current build tree
+# top_srcdir for original stuff, top_builddir for generated files
+GNURADIO_INCLUDES = @gnuradio_core_INCLUDES@
+
+# How to link in GNU Radio core library from inside the tree
+GNURADIO_CORE_LA = @gnuradio_core_LA@
+
+# How to link in the USRP library from inside the tree
+GRUEL_INCLUDES = @gruel_INCLUDES@
+GRUEL_LA = @gruel_LA@
+
+# How to link in the USRP library from inside the tree
+USRP_INCLUDES = @usrp_INCLUDES@
+USRP_LA = @usrp_LA@
+
+# How to link the gcell library from inside the tree (the PPU part)
+GCELL_INCLUDES = @gcell_INCLUDES@
+GCELL_LA = @gcell_LA@
+
+# How to link the gcell library from inside the tree (the SPU part)
+GCELL_SPU_INCLUDES = @gcell_spu_INCLUDES@
+GCELL_SPU_LA = @gcell_spu_LA@
+
+# libtool aware wrapper for ppu-embedspu
+GCELL_EMBEDSPU_LIBTOOL = @abs_top_srcdir@/gcell/lib/runtime/gcell-embedspu-libtool
+
+# Fix for BSD make not defining $(RM).  We define it now in configure.ac
+# using AM_PATH_PROG, but now here have to add a -f to be like GNU make
+RM=$(RM_PROG) -f
+
+RUN_GUILE = GUILE_LOAD_PATH="@abs_top_srcdir@/gruel/src/scheme" @GUILE@ -e main -s
+
+# Base directory for example applications
+exampledir = $(datadir)/gnuradio/examples
+
+# Base directory for documentation (docdir undefined in autoconf < 1.60)
+docdir ?= $(datadir)/doc/$(PACKAGE)
+gr_docdir = $(docdir)-$(DOCVER)
+
+# System configuration files
+gr_prefsdir = $(GR_PREFSDIR)
+
+# Data directory for grc block wrappers
+grc_blocksdir = $(pkgdatadir)/grc/blocks
+
+# Other common defines; use "+=" to add to these
+STAMPS =
+MOSTLYCLEANFILES = $(BUILT_SOURCES) $(STAMPS) *.pyc *.pyo *~ *.tmp *.loT
+
+# Don't distribute the files defined in the variable 'no_dist_files'
+dist-hook:
+	@for file in $(no_dist_files); do \
+		echo $(RM) $(distdir)/$$file; \
+		$(RM) $(distdir)/$$file; \
+	done;
diff --git a/firmware/fx2/NEWS b/firmware/fx2/NEWS
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/firmware/fx2/NEWS
diff --git a/firmware/fx2/README b/firmware/fx2/README
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/firmware/fx2/README
diff --git a/firmware/fx2/bootstrap b/firmware/fx2/bootstrap
new file mode 100755
index 000000000..7daff90d1
--- /dev/null
+++ b/firmware/fx2/bootstrap
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# Copyright 2001,2005,2008 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+
+rm -fr config.cache autom4te*.cache
+
+aclocal -I config
+autoconf
+autoheader
+libtoolize --automake
+automake --add-missing -Wno-portability -Wno-override -Wnone
+#automake --add-missing -Wno-portability
diff --git a/firmware/fx2/config/.gitignore b/firmware/fx2/config/.gitignore
new file mode 100644
index 000000000..16f775e32
--- /dev/null
+++ b/firmware/fx2/config/.gitignore
@@ -0,0 +1,15 @@
+/*.cache
+/*.la
+/*.lo
+/*.pc
+/.deps
+/.la
+/.libs
+/.lo
+/Makefile
+/Makefile.in
+/libtool.m4
+/lt~obsolete.m4
+/ltsugar.m4
+/ltversion.m4
+/ltoptions.m4
diff --git a/firmware/fx2/config/Makefile.am b/firmware/fx2/config/Makefile.am
new file mode 100644
index 000000000..487ceed1b
--- /dev/null
+++ b/firmware/fx2/config/Makefile.am
@@ -0,0 +1,49 @@
+#
+# Copyright 2001,2006,2008,2009,2010 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+include $(top_srcdir)/Makefile.common
+
+# Install m4 macros in this directory
+m4datadir = $(datadir)/aclocal
+
+# List your m4 macros here
+m4macros = \
+	grc_build.m4 \
+	grc_fx2.m4 \
+	gr_git.m4 \
+	gr_lib64.m4 \
+	gr_no_undefined.m4 \
+	gr_pwin32.m4 \
+	gr_python.m4 \
+	gr_require_mc4020.m4 \
+	gr_scripting.m4 \
+	gr_set_md_cpu.m4 \
+	gr_standalone.m4 \
+	lf_cc.m4 \
+	lf_cxx.m4 \
+	lf_warnings.m4 \
+	lf_x11.m4 \
+	mkstemp.m4 \
+	onceonly.m4 \
+	pkg.m4 \
+	usrp_sdcc.m4
+
+EXTRA_DIST = $(m4macros) 
diff --git a/firmware/fx2/config/gr_git.m4 b/firmware/fx2/config/gr_git.m4
new file mode 100644
index 000000000..5e8aa663b
--- /dev/null
+++ b/firmware/fx2/config/gr_git.m4
@@ -0,0 +1,58 @@
+dnl Copyright 2009,2010 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+
+AC_DEFUN([GR_GIT],[
+  dnl Identify git binary
+  AC_PATH_PROG([GIT],[git])
+  
+  dnl If it exists, get either 'git describe' or fallback to current commit
+  if test x$GIT != x ; then
+    AC_MSG_CHECKING([existence of git version control directory])
+    if test -d $srcdir/.git ; then
+      AC_MSG_RESULT([ok])
+      AC_MSG_CHECKING([git description of current commit])
+      if (cd $srcdir && $GIT describe >/dev/null 2>&1); then
+        GIT_DESCRIBE=`cd $srcdir && $GIT describe --abbrev=8 --long`
+	GIT_TAG=`echo $GIT_DESCRIBE | cut -f 1 -d '-'`
+        GIT_SEQNO=`echo $GIT_DESCRIBE | cut -f 2 -d '-'`
+	GIT_COMMIT=`echo $GIT_DESCRIBE | cut -f 3 -d '-' | cut -f 2- -d 'g'`
+        # Release candidate tags create an extra -rcX field
+	if test x`echo $GIT_DESCRIBE | cut -f 1- -d '-' --output-delimiter=' ' | wc -w` = x4; then
+	  GIT_TAG=`echo $GIT_DESCRIBE | cut -f -2 -d '-'`
+	  GIT_SEQNO=`echo $GIT_DESCRIBE | cut -f 3 -d '-'`
+	  GIT_COMMIT=`echo $GIT_DESCRIBE | cut -f 4 -d '-' | cut -f 2- -d 'g'`
+	fi
+	AC_MSG_RESULT([$GIT_DESCRIBE])
+      else
+        AC_MSG_RESULT([unable to find, using current commit])
+	GIT_TAG=''
+	GIT_SEQNO=''
+	GIT_COMMIT=`cd $srcdir && $GIT describe --always --abbrev=8`
+      fi
+    else
+      AC_MSG_RESULT([not found])
+    fi
+
+    AC_SUBST([GIT_DESCRIBE])
+    AC_SUBST([GIT_TAG])
+    AC_SUBST([GIT_SEQNO])
+    AC_SUBST([GIT_COMMIT])
+  fi
+])
diff --git a/firmware/fx2/config/gr_lib64.m4 b/firmware/fx2/config/gr_lib64.m4
new file mode 100644
index 000000000..751f774b4
--- /dev/null
+++ b/firmware/fx2/config/gr_lib64.m4
@@ -0,0 +1,85 @@
+dnl
+dnl Copyright 2005,2008 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+dnl 
+
+dnl GR_LIB64()
+dnl
+dnl Checks to see if we're on a x86_64 or powerpc64 machine, and if so, determine
+dnl if libdir should end in "64" or not.
+dnl
+dnl Sets gr_libdir_suffix to "" or "64" and calls AC_SUBST(gr_libdir_suffix)
+dnl May append "64" to libdir.
+dnl
+dnl The current heuristic is:
+dnl   if the host_cpu isn't x86_64 or powerpc64, then ""
+dnl   if the host_os isn't linux, then ""
+dnl   if we're cross-compiling, ask the linker, by way of the selected compiler
+dnl   if we're x86_64 and there's a /lib64 and it's not a symlink, then "64", else ""
+dnl   else ask the compiler
+dnl
+AC_DEFUN([GR_LIB64],[
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_REQUIRE([AC_PROG_CXX])
+
+  AC_MSG_CHECKING([gr_libdir_suffix])
+  gr_libdir_suffix=""
+  AC_SUBST(gr_libdir_suffix)
+
+  case "$host_os" in
+    linux*) is_linux=yes ;;
+    *)      is_linux=no  ;;
+  esac
+
+  if test "$is_linux" = no || test "$host_cpu" != "x86_64" && test "$host_cpu" != "powerpc64"; then
+    gr_libdir_suffix=""
+  elif test "$cross_compiling" = yes; then
+    _GR_LIB64_ASK_COMPILER
+  elif test "$host_cpu" = "x86_64"; then
+    if test -d /lib64 && test ! -L /lib64; then
+      gr_libdir_suffix=64
+    fi
+  else
+    _GR_LIB64_ASK_COMPILER  
+  fi
+  AC_MSG_RESULT([$gr_libdir_suffix])
+
+
+  AC_MSG_CHECKING([whether to append 64 to libdir])
+  t=${libdir##*/lib}
+  if test "$t" != 64 && test "$gr_libdir_suffix" = "64"; then
+    libdir=${libdir}64
+    AC_MSG_RESULT([yes. Setting libdir to $libdir])
+  else
+    AC_MSG_RESULT([no])
+  fi
+])
+
+dnl If we're using g++, extract the first SEARCH_DIR("...") entry from the linker script
+dnl and see if it contains a suffix after the final .../lib part of the path.
+dnl (This works because the linker script varies depending on whether we're generating
+dnl 32-bit or 64-bit executables)
+dnl
+AC_DEFUN([_GR_LIB64_ASK_COMPILER],[
+  if test "$ac_cv_cxx_compiler_gnu" = "yes";
+  then
+    gr_libdir_suffix=`$CXX -Wl,--verbose 2>/dev/null | sed -n -e '/SEARCH_DIR/{s/;.*$//; s,^.*/,,; s/".*$//; s/^lib//; p}'`
+  fi
+])
+
diff --git a/firmware/fx2/config/gr_no_undefined.m4 b/firmware/fx2/config/gr_no_undefined.m4
new file mode 100644
index 000000000..c8d745d5f
--- /dev/null
+++ b/firmware/fx2/config/gr_no_undefined.m4
@@ -0,0 +1,44 @@
+dnl
+dnl Copyright 2005 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+dnl 
+
+# GR_NO_UNDEFINED()
+#
+# Detemine whether we need to use the -no-undefined linker flag
+# when building shared libraries.  
+# Sets NO_UNDEFINED to "" or "-no-undefined"
+# 
+# As far as I can tell, we need -no-undefined only when building
+# windows DLLs.  This occurs when using MinGW and Cygwin.
+#
+# For now, we stub this out.
+
+AC_DEFUN([GR_NO_UNDEFINED],[
+	AC_REQUIRE([AC_CANONICAL_HOST])
+	no_undefined=""
+	case "${host_os}" in
+		*mingw* | *cygwin*)
+
+		# on MinGW/Cygwin extra LDFLAGS are required
+		no_undefined="-no-undefined"
+		;;
+	esac
+	AC_SUBST(NO_UNDEFINED,[$no_undefined])
+])
diff --git a/firmware/fx2/config/gr_pwin32.m4 b/firmware/fx2/config/gr_pwin32.m4
new file mode 100644
index 000000000..495e9dd4d
--- /dev/null
+++ b/firmware/fx2/config/gr_pwin32.m4
@@ -0,0 +1,149 @@
+# Check for (mingw)win32 POSIX replacements.             -*- Autoconf -*-
+
+# Copyright 2003,2004,2005 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+
+AC_DEFUN([GR_PWIN32],
+[
+AC_REQUIRE([AC_HEADER_TIME])
+AC_CHECK_HEADERS([sys/types.h fcntl.h io.h])
+AC_CHECK_HEADERS([windows.h])
+AC_CHECK_HEADERS([winioctl.h winbase.h], [], [], [
+	#if HAVE_WINDOWS_H
+	#include <windows.h>
+	#endif
+])
+
+AC_CHECK_FUNCS([getopt usleep gettimeofday nanosleep rand srand random srandom sleep sigaction])
+AC_CHECK_TYPES([struct timezone, struct timespec, ssize_t],[],[],[
+     #if HAVE_SYS_TYPES_H
+     # include <sys/types.h>
+     #endif
+     #if TIME_WITH_SYS_TIME
+     # include <sys/time.h>
+     # include <time.h>
+     #else
+     # if HAVE_SYS_TIME_H
+     #  include <sys/time.h>
+     # else
+     #  include <time.h>
+     # endif
+     #endif
+])
+
+dnl Checks for replacements
+AC_REPLACE_FUNCS([getopt usleep gettimeofday])
+
+
+AC_MSG_CHECKING(for Sleep)
+AC_TRY_LINK([   #include <windows.h>
+                #include <winbase.h>
+                ], [ Sleep(0); ],
+                [AC_DEFINE(HAVE_SSLEEP,1,[Define to 1 if you have win32 Sleep])
+                AC_MSG_RESULT(yes)],
+                AC_MSG_RESULT(no)
+                )
+
+dnl Under Win32, mkdir prototype in io.h has only one arg
+AC_MSG_CHECKING(whether mkdir accepts only one arg)
+AC_TRY_COMPILE([#include <sys/types.h>
+       #include <sys/stat.h>
+       #include <fcntl.h>], [
+       mkdir("")
+ ], [ AC_MSG_RESULT(yes)
+     AC_DEFINE(MKDIR_TAKES_ONE_ARG,[],[Define if mkdir accepts only one arg]) ],
+ [ AC_MSG_RESULT(no)
+ ])
+
+AH_BOTTOM(
+[
+/* Define missing prototypes, implemented in replacement lib */
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifndef HAVE_GETOPT
+int getopt (int argc, char * const argv[], const char * optstring);
+extern char * optarg;
+extern int optind, opterr, optopt;
+#endif
+
+#ifndef HAVE_USLEEP
+int usleep(unsigned long usec);	/* SUSv2 */
+#endif
+
+#ifndef HAVE_NANOSLEEP
+#ifndef HAVE_STRUCT_TIMESPEC
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>	/* need time_t */
+#endif
+struct timespec {
+	time_t	tv_sec;
+	long	tv_nsec;
+};
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+static inline int nanosleep(const struct timespec *req, struct timespec *rem) { return usleep(req->tv_sec*1000000+req->tv_nsec/1000); }
+#endif
+
+#if defined(HAVE_SSLEEP) && !defined(HAVE_SLEEP)
+#ifdef HAVE_WINBASE_H
+#include <windows.h>
+#include <winbase.h>
+#endif
+/* TODO: what about SleepEx? */
+static inline unsigned int sleep (unsigned int nb_sec) { Sleep(nb_sec*1000); return 0; }
+#endif
+
+#ifndef HAVE_GETTIMEOFDAY
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifndef HAVE_STRUCT_TIMEZONE
+struct timezone {
+        int  tz_minuteswest;
+	int  tz_dsttime;
+};
+#endif
+int gettimeofday(struct timeval *tv, struct timezone *tz);
+#endif
+
+#if !defined(HAVE_RANDOM) && defined(HAVE_RAND)
+#include <stdlib.h>
+static inline long int random (void) { return rand(); }
+#endif
+
+#if !defined(HAVE_SRANDOM) && defined(HAVE_SRAND)
+static inline void srandom (unsigned int seed) { srand(seed); }
+#endif
+
+#ifndef HAVE_SSIZE_T
+typedef size_t ssize_t;
+#endif
+
+#ifdef  __cplusplus
+}
+#endif
+])
+
+
+])
diff --git a/firmware/fx2/config/gr_python.m4 b/firmware/fx2/config/gr_python.m4
new file mode 100644
index 000000000..43ccfc015
--- /dev/null
+++ b/firmware/fx2/config/gr_python.m4
@@ -0,0 +1,172 @@
+dnl
+dnl Copyright 2003,2004,2005 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+dnl 
+
+# PYTHON_DEVEL()
+#
+# Checks for Python and tries to get the include path to 'Python.h'.
+# It sets the $(PYTHON_CPPFLAGS), $(PYTHON_LDFLAGS) and $(pythondir) output variables,
+#
+AC_DEFUN([PYTHON_DEVEL],[
+	AC_REQUIRE([AM_PATH_PYTHON])
+	AC_REQUIRE([AC_CANONICAL_HOST])
+
+	AC_ARG_WITH(pythondir,
+                    AC_HELP_STRING([--with-pythondir=DIR], 
+                       [python installation directory (cross-compiling) [[default=$prefix/lib/python2.5/site-packages]]]),
+		    [with_pythondir=${withval}],[with_pythondir=${prefix}/lib/python2.5/site-packages])
+
+	# if we're cross-compiling, asking the host python about any of
+	# this is completely useless...
+
+	if test x$cross_compiling != xno
+	then
+		pythondir=$with_pythondir
+		pyexecdir=$with_pythondir
+		AC_SUBST(PYTHON_CPPFLAGS)
+		AC_SUBST(PYTHON_LDFLAGS)
+        else
+
+	    # For Fedora Core 5 and 6, see ticket:39 in Trac
+	    if test -f '/etc/redhat-release'; then
+		    if  (echo $pyexecdir | grep -q lib64); then
+			    pythondir="$pyexecdir"
+		    fi
+	    fi
+
+	    # Check for Python include path
+	    AC_MSG_CHECKING([for Python include path])
+	    if test -z "$PYTHON" ; then
+		    AC_MSG_ERROR([cannot find Python path])
+	    fi
+
+	    # ask distutils which include path we should use
+	    python_cmd='
+import distutils.sysconfig
+import os
+path = distutils.sysconfig.get_python_inc(plat_specific=False)
+if os.sep == "\\":
+  path = path.replace("\\", "/")
+print path
+'
+	    python_path=`$PYTHON -c "$python_cmd"`
+	    AC_MSG_RESULT([$python_path])
+	    if test -z "$python_path" ; then
+		    AC_MSG_ERROR([cannot find Python include path])
+	    fi
+
+	    AC_SUBST(PYTHON_CPPFLAGS,[-I$python_path])
+
+	    # Check for Python headers usability
+	    python_save_CPPFLAGS=$CPPFLAGS
+	    CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
+	    AC_CHECK_HEADERS([Python.h], [],
+			    [AC_MSG_ERROR([cannot find usable Python headers])])
+	    CPPFLAGS="$python_save_CPPFLAGS"
+
+	    # Only set this on mingw and cygwin hosts, (only implemented
+	    # for mingw host, for crosscompiling you need to trick this)
+
+	    PYTHON_LDFLAGS=""
+	    case $host_os in
+		 *mingw* | *cygwin* )
+	      AC_MSG_CHECKING([for Python LDFLAGS])
+
+	    python_cmd='
+import distutils.sysconfig
+import os
+path = distutils.sysconfig.get_config_var("LIBPL")
+if path == None:
+  path = distutils.sysconfig.PREFIX + "/libs"
+if os.sep == "\\":
+  path = path.replace("\\", "/")
+print path
+'
+	      python_stdlib_path=`$PYTHON -c "$python_cmd"`
+
+	      python_version_nodot=`echo $PYTHON_VERSION | sed "s,\.,,"`
+	      libpython_name="python$PYTHON_VERSION"
+
+	      # Standard install of python for win32 has libpython24.a
+	      # instead of libpython2.4.a so we check for the library
+	      # without the dot in the version number.
+
+	      python_stdlib_filename=`find $python_stdlib_path -type f -name libpython$python_version_nodot.* -print | sed "1q"`
+	      if test -n "$python_stdlib_filename" ; then
+		    libpython_name="python$python_version_nodot"
+	      fi
+
+	      PYTHON_LDFLAGS="-L$python_stdlib_path -l$libpython_name"
+	      AC_MSG_RESULT($PYTHON_LDFLAGS) 
+	      # Replace all backslashes in PYTHON Paths with forward slashes
+	      pythondir=`echo $pythondir |sed 's,\\\\,/,g'`
+	      pkgpythondir=`echo $pkgpythondir |sed 's,\\\\,/,g'`
+	      pyexecdir=`echo $pyexecdir |sed 's,\\\\,/,g'`
+	      pkgpyexecdir=`echo $pkgpyexecdir |sed 's,\\\\,/,g'`
+	      ;;
+	    esac
+
+	    case $host_os in
+		 *mingw* )
+	      # Python 2.5 requires ".pyd" instead of ".dll" for extensions
+	      PYTHON_LDFLAGS="-shrext .pyd ${PYTHON_LDFLAGS}"
+	    esac
+
+	    AC_SUBST(PYTHON_LDFLAGS)
+	fi
+])
+
+# PYTHON_CHECK_MODULE
+#
+# Determines if a particular Python module can be imported
+#
+# $1 - module name
+# $2 - module description
+# $3 - action if found
+# $4 - action if not found
+# $5 - test command
+
+AC_DEFUN([PYTHON_CHECK_MODULE],[
+    AC_MSG_CHECKING([for $2])
+    dnl ########################################
+    dnl # import and test checking
+    dnl ########################################
+    if test "$5"; then
+        python_cmd='
+try:
+    import $1
+    assert $5
+except: exit(1)'
+    dnl ########################################
+    dnl # import checking only
+    dnl ########################################
+    else
+        python_cmd='
+try: import $1
+except: exit(1)'
+    fi
+    if ! $PYTHON -c "$python_cmd" 2> /dev/null; then
+        AC_MSG_RESULT([no])
+        $4
+    else
+        AC_MSG_RESULT([yes])
+        $3
+    fi
+])
diff --git a/firmware/fx2/config/gr_scripting.m4 b/firmware/fx2/config/gr_scripting.m4
new file mode 100644
index 000000000..2803e975f
--- /dev/null
+++ b/firmware/fx2/config/gr_scripting.m4
@@ -0,0 +1,26 @@
+dnl
+dnl Copyright 2003 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+dnl 
+
+AC_DEFUN([GR_SCRIPTING],[
+  AC_REQUIRE([AC_PROG_LN_S])
+  AC_REQUIRE([AC_PROG_CXX])
+  AC_REQUIRE([AC_PROG_LIBTOOL])
+])
diff --git a/firmware/fx2/config/gr_standalone.m4 b/firmware/fx2/config/gr_standalone.m4
new file mode 100644
index 000000000..370f7fb03
--- /dev/null
+++ b/firmware/fx2/config/gr_standalone.m4
@@ -0,0 +1,116 @@
+dnl
+dnl Copyright 2008 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License along
+dnl with this program; if not, write to the Free Software Foundation, Inc.,
+dnl 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+dnl
+
+dnl
+dnl GR_STANDALONE([package],[version])
+dnl
+dnl Handles the bulk of the configure.ac work for an out-of-tree build
+dnl
+dnl N.B., this is an m4_define because if it were an AC_DEFUN it would
+dnl get called too late to be useful.
+
+m4_define([GR_STANDALONE],
+[
+  AC_INIT([$1],[$2])
+  AC_PREREQ(2.57)
+  AC_CONFIG_SRCDIR([config/gr_standalone.m4])
+  AC_CONFIG_AUX_DIR([.])	
+  AM_CONFIG_HEADER(config.h)
+
+  AC_CANONICAL_BUILD
+  AC_CANONICAL_HOST
+  AC_CANONICAL_TARGET
+
+  AM_INIT_AUTOMAKE
+
+  LF_CONFIGURE_CC
+  LF_CONFIGURE_CXX
+  GR_LIB64		dnl check for lib64 suffix after choosing compilers
+
+  dnl add ${prefix}/lib${gr_libdir_suffix}/pkgconfig to the head of the PKG_CONFIG_PATH
+  if test x${PKG_CONFIG_PATH} = x; then
+      PKG_CONFIG_PATH=${prefix}/lib${gr_libdir_suffix}/pkgconfig
+  else
+      PKG_CONFIG_PATH=${prefix}/lib${gr_libdir_suffix}/pkgconfig:${PKG_CONFIG_PATH}
+  fi
+  export PKG_CONFIG_PATH
+
+  LF_SET_WARNINGS
+  GR_SET_GPROF
+  GR_SET_PROF
+  AM_PROG_AS
+  AC_PROG_LN_S
+  AC_PROG_MAKE_SET
+  AC_PROG_INSTALL
+  AC_PATH_PROG([RM_PROG], [rm])
+
+  AC_LIBTOOL_WIN32_DLL
+  AC_ENABLE_SHARED	dnl do build shared libraries
+  AC_DISABLE_STATIC	dnl don't build static libraries
+  m4_ifdef([LT_INIT],[LT_INIT],[AC_PROG_LIBTOOL])
+  dnl GR_FORTRAN
+
+  GR_NO_UNDEFINED	dnl do we need the -no-undefined linker flag
+  GR_SCRIPTING		dnl Locate python, SWIG, etc
+
+  AC_ARG_WITH([python],
+    AC_HELP_STRING([--with-python], [Should we use python? [[default=yes]]]),
+    [case "$with_python" in
+      (no | yes) ;;
+      (*) AC_MSG_ERROR([Invalid argument ($with_python) to --with-python]) ;;
+     esac],
+    [with_python=yes])
+
+  AM_CONDITIONAL([USE_PYTHON], [test "$with_python" = yes])
+
+
+  dnl Set the c++ compiler that we use for the build system when cross compiling
+  if test "x$CXX_FOR_BUILD" = x
+  then
+    CXX_FOR_BUILD=${CXX}
+  fi
+  AC_SUBST(CXX_FOR_BUILD)
+
+  dnl Checks for header files.
+  AC_HEADER_STDC
+
+  dnl Checks for typedefs, structures, and compiler characteristics.
+  AC_C_CONST
+  AC_C_INLINE
+  AC_TYPE_SIZE_T
+  AC_HEADER_TIME
+  AC_C_BIGENDIAN
+
+  dnl Check for Mingw support
+  GR_PWIN32
+
+  AC_CHECK_PROG([XMLTO],[xmlto],[yes],[])
+  AM_CONDITIONAL([HAS_XMLTO], [test x$XMLTO = xyes])
+
+  dnl Define where to look for cppunit includes and libs
+  dnl sets CPPUNIT_CFLAGS and CPPUNIT_LIBS
+  dnl Try using pkg-config first, then fall back to cppunit-config.
+  PKG_CHECK_EXISTS(cppunit,
+    [PKG_CHECK_MODULES(CPPUNIT, cppunit >= 1.9.14)],
+    [AM_PATH_CPPUNIT([1.9.14],[],
+		     [AC_MSG_ERROR([GNU Radio requires cppunit.  Stop])])])
+
+  PKG_CHECK_MODULES(GNURADIO_CORE, gnuradio-core >= 3)
+])
diff --git a/firmware/fx2/config/grc_build.m4 b/firmware/fx2/config/grc_build.m4
new file mode 100644
index 000000000..77b59db6b
--- /dev/null
+++ b/firmware/fx2/config/grc_build.m4
@@ -0,0 +1,287 @@
+dnl Copyright 2006,2008,2009 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+dnl Create --enable-foo argument for named component, create variables as needed
+dnl $1 is component name
+AC_DEFUN([GRC_ENABLE], [
+    _GRC_ENABLE($1,m4_bpatsubst($1,-,_))
+])
+dnl $2 is the '_'d component name
+dnl on exit variable enable_$2 will be set to [yes|no];
+dnl         passed will be [yes|no] (same as enable_$2)
+
+AC_DEFUN([_GRC_ENABLE],[
+    passed=yes
+    AC_ARG_ENABLE([$1],
+		  AC_HELP_STRING([--enable-$1],
+				 [Stop if $1 fails configuration]),
+		  [],[
+        [enable_]$2=$enable_all_components
+        if test x$enable_all_components = xno; then
+            passed=no
+        fi
+    ])
+])
+dnl Component specific configuration
+dnl The order of the GR_ macros determines the order of compilation
+dnl For -any- checks on $enable_all_components
+dnl use the following guildlines:
+dnl   yes : --enable-all-components was specified, so error out if any
+dnl         components do not pass configuration checks.
+dnl   no  : --disable-all-components was specified, so try to build the
+dnl         --enable'd components, and error out if any do not pass
+dnl         configuration checks.
+dnl   ""  : this option was not specified on the command line; try to
+dnl         build all components that are not --with'd, but don't
+dnl         error out if any component does not pass configuration checks.
+dnl
+dnl For each --enable-foo component, if that flag is not specified on
+dnl the command line, the related variable $enable_foo will be set to
+dnl $enable_all_components .
+
+dnl Create --with-foo argument for named compoment, create variables as needed
+dnl $1 is component name
+dnl $2 is what to do on success
+dnl $3 is the PKG_CONFIG name; if not given, then $1
+AC_DEFUN([GRC_WITH], [
+    if test [x]$3 = x; then
+        pc_comp_name="$1"
+    else
+        pc_comp_name="$3"
+    fi
+    _GRC_WITH($1,[$2],${pc_comp_name},m4_bpatsubst($1,-,_))
+])
+dnl $3 is the pkg-config component name
+dnl $4 is the '_'d component name
+dnl on exit variable passed will be [yes|no|with]:
+dnl   yes: if --enable-$1 and/or --enable-all-components was specified,
+dnl        but --with was not;
+dnl   with: if --with-$1 was specified, and passed checks;
+dnl   no: all other conditions
+AC_DEFUN([_GRC_WITH],[
+    AC_ARG_WITH([$1],
+	        AC_HELP_STRING([--with-$1@<:@=PATH@:>@],
+	 		       [Use package $1 if installed in PATH (if specified) or PKG_CONFIG_PATH (if PATH not specified); stop if $1 not found]),
+                [if test "x$withval" != "xyes"; then
+		    [with_]$4[_val]=$withval
+		    [with_]$4=yes
+		 fi],
+	        [])
+    if test x$[with_]$4 = xyes; then
+        if test x$[enable_]$4 = xyes; then
+	    AC_MSG_ERROR([Component $1: Cannot use both --enable and --with])
+        else
+	    _GRC_WITH_PKG_CONFIG_CHECK($1,$3,$4)
+	    ifelse([$2], , :, [$2])
+        fi
+    fi
+])
+
+dnl Use 'pkgconfig' to check for a package
+dnl $1 is the --with component name
+dnl $2 is the pkg-config component name, if provided; otherwise use $1 for this
+dnl on success, resulting INCLUDES, INCLUDEDIR, LA, and LIBDIRPATH variables
+dnl will be set; on failure, will exit with an error.
+AC_DEFUN([GRC_WITH_PKG_CONFIG_CHECK], [
+    if test [x]$2 = x; then
+        pc_comp_name="$1"
+    else
+        pc_comp_name="$2"
+    fi
+    _GRC_WITH_PKG_CONFIG_CHECK($1,${pc_comp_name},m4_bpatsubst($1,-,_))
+])
+dnl $2 is the pkg-config component name
+dnl $3 is the '_'d component name
+AC_DEFUN([_GRC_WITH_PKG_CONFIG_CHECK],[
+    dnl save PKG_CONFIG_PATH, restore at the end
+    s_PKG_CONFIG_PATH=$PKG_CONFIG_PATH
+
+    dnl create the PKG_CONFIG_PATH, via this component arg, if provided;
+    dnl else use the environment PKG_CONFIG_PATH
+    l_PKG_CONFIG_PATH=$[with_]$3[_val]
+    if test "x$l_PKG_CONFIG_PATH" != "x"; then
+        export PKG_CONFIG_PATH=$l_PKG_CONFIG_PATH
+
+        dnl verify that the file exists; if not, no point in continuing
+        if ! test -r ${l_PKG_CONFIG_PATH}/$2[.pc]; then
+	    AC_MSG_ERROR([Component $1: PKGCONFIG cannot find info for $2, with provided PKG_CONFIG_PATH = @<:@ $l_PKG_CONFIG_PATH @:>@ .])
+        fi
+    fi
+
+    dnl do the check; error out if not found
+    PKG_CHECK_EXISTS($2, [passed=with; check1=yes], [
+        check1=no
+        dnl pkg-config returned an error; this might be that the .pc
+	dnl file was not valid, or the Requires: were not met.
+	dnl If the arg was provided and the input PKG_CONFIG_PATH , then try
+	dnl again appending the whole PKG_CONFIG_PATH.
+	if test "x$l_PKG_CONFIG_PATH" != "x"; then
+            if test "x$s_PKG_CONFIG_PATH" != "x"; then
+                export PKG_CONFIG_PATH=${PKG_CONFIG_PATH}:${s_PKG_CONFIG_PATH}
+	        PKG_CHECK_EXISTS($2, passed=with, passed=no)
+            fi
+        fi
+        if test $passed != with; then
+            AC_MSG_ERROR([Component $1: PKGCONFIG cannot find info for $2, with PKG_CONFIG_PATH = @<:@ $PKG_CONFIG_PATH @:>@ .])
+        fi
+        dnl pkg-config Requires are now met; save the new PKG_CONFIG_PATH
+        s_PKG_CONFIG_PATH=$PKG_CONFIG_PATH
+    ])
+
+    dnl if PKG_CHECK_EXISTS returned, then this component's .pc file was
+    dnl found in the provided 'arg' PKG_CONFIG_PATH;
+    dnl retrieve various parameters
+    $3[_INCLUDES]=`$PKG_CONFIG --cflags-only-I $2`
+    $3[_LA]=`$PKG_CONFIG --libs $2`
+    $3[_INCLUDEDIR]=`$PKG_CONFIG --variable=includedir $2`
+
+    if test x$check1 = xyes; then
+        dnl prepend the args PKG_CONFIG_PATH to the saved one, if the
+	dnl saved version was not empty
+        if test "x$s_PKG_CONFIG_PATH" != "x"; then
+            export PKG_CONFIG_PATH=${PKG_CONFIG_PATH}:${s_PKG_CONFIG_PATH}
+        fi
+    fi
+])
+
+dnl Check the $prefix versus the --with libdirpath for this component
+dnl $1 is the prefix
+dnl $2 is the --with component name
+dnl $3 is the --with component library path
+AC_DEFUN([GRC_PREFIX_LDFLAGS],[
+    $2[_LIBDIRPATH]=$3
+    dnl create LDFLAGS for this --with, if different from the provided $prefix
+    if test [x]$1[/lib] != [x]$3; then
+        $2[_LDFLAG]=[-L]$3
+    else
+        $2[_LDFLAG]=
+    fi
+])
+
+dnl Check to make sure this dependency is fulfilled for this component
+dnl $1 is the component's name
+dnl $2 is the component dependency name
+dnl On input and exit, $passed will be:
+dnl   with : if --with passed muster
+dnl   yes  : if --enable passed muster
+dnl   no   : otherwise
+dnl If trying --with, will error-out if any dependency was not --with'd
+AC_DEFUN([GRC_CHECK_DEPENDENCY],[
+dnl    f0=[enable_]m4_bpatsubst($1,-,_)
+dnl    f1=[$enable_]m4_bpatsubst($1,-,_)
+dnl    echo
+dnl    echo "$1 : Checking Dependency $2"
+dnl    echo "$1 : enable_all_components is '$enable_all_components'"
+dnl    echo "$1 : $f0 is '$f1'"
+dnl    echo "$1 : passed is '$passed'"
+dnl    echo
+    if test $passed != no; then
+        if test $passed = yes; then
+            dnl make sure this dependency was not skipped
+            if test [x$]m4_bpatsubst($2,-,_)[_skipped] = xyes; then
+                AC_MSG_RESULT([Component $1 requires $2, which is not being built or specified via pre-installed files.])
+                passed=no
+            fi
+        else
+            dnl make sure this dependency was --with'd only; not --enable'd
+            if test [x$]m4_bpatsubst($2,-,_)[_with] = xno; then
+                AC_MSG_ERROR([Component $1 requires $2 to be included as --with-$2@<:@=arg@:>@])
+            fi
+        fi
+    fi
+])
+
+dnl Check to make sure GUILE is available
+dnl $1 is the component name
+AC_DEFUN([GRC_CHECK_GUILE],[
+    if test x"$GUILE" = x; then
+        AC_MSG_RESULT([Component $1 requires guile, which was not found.])
+        passed=no
+    fi
+])
+
+dnl Add the specified "with" list; clear the provided variable
+dnl $1 is the component name
+dnl $2 is the path list name suffix
+dnl $3 is the separator (for paths, ":"; for includes " ")
+AC_DEFUN([GRC_ADD_TO_LIST],[
+    if test "x${$1[_]$2}" != "x"; then
+        if test "x$[with_]$2" = "x"; then
+            [with_]$2="${$1[_]$2}"
+	else
+	    [with_]$2="${$1[_]$2}"$3"$[with_]$2"
+	fi
+	$1[_]$2=
+    fi
+])
+
+dnl Conditionally build named component.
+dnl $1 is component name
+dnl $2 is executed if configuration passes and build is desired
+AC_DEFUN([GRC_BUILD_CONDITIONAL],[
+    _GRC_BUILD_CONDITIONAL($1, $2, m4_bpatsubst($1,-,_))
+])
+dnl $3=m4_bpatsubst($1,-,_)
+dnl Use $passed=no to indicate configuration failure;
+dnl Use $passed=with to indicate the use of pre-installed libraries and headers;
+dnl Any other value of $passed, including blank, assumes success;
+dnl Defines $3_with=[yes|no] depending on if $passed=with or not (respectively)
+dnl Defines $3_skipped=[yes|no] depending on if $passed=no or not (respectively)
+AC_DEFUN([_GRC_BUILD_CONDITIONAL],[
+    $3[_with]=no
+    if test $passed = no; then
+	if test x$[enable_]$3 = xyes; then
+	    AC_MSG_ERROR([Component $1 has errors; stopping.])
+	else
+	    AC_MSG_RESULT([Not building component $1.])
+	fi
+    else
+        if test $passed = with; then
+	    with_dirs="$with_dirs $1"
+	    GRC_ADD_TO_LIST($3, INCLUDES, " ")
+	    GRC_ADD_TO_LIST($3, SWIG_INCLUDES, " ")
+	    GRC_ADD_TO_LIST($3, PYDIRPATH, ":")
+	    GRC_ADD_TO_LIST($3, SWIGDIRPATH, ":")
+	    GRC_ADD_TO_LIST($3, LIBDIRPATH, ":")
+	    AC_MSG_RESULT([Component $1 will be included from a pre-installed library and includes.])
+	    $3[_with]=yes
+	else
+	    $3[_LDFLAG]=
+            if test x$[enable_]$3 != xno; then
+	        ifelse([$2], , :, [$2])
+	        build_dirs="$build_dirs $1"
+	        AC_MSG_RESULT([Component $1 passed configuration checks; building.])
+            else
+	        passed=no
+	        AC_MSG_RESULT([Component $1 passed configuration checks; but not building.])
+	    fi
+	fi
+    fi
+    if test $passed = no; then
+        skipped_dirs="$skipped_dirs $1"
+        $3[_skipped]=yes
+    else
+        $3[_skipped]=no
+    fi
+    AC_SUBST($3[_INCLUDES])
+    AC_SUBST($3[_LA])
+    AC_SUBST($3[_INCLUDEDIR])
+    AC_SUBST($3[_LIBDIRPATH])
+    AC_SUBST($3[_LDFLAG])
+])
diff --git a/firmware/fx2/config/grc_fx2.m4 b/firmware/fx2/config/grc_fx2.m4
new file mode 100644
index 000000000..00a41c973
--- /dev/null
+++ b/firmware/fx2/config/grc_fx2.m4
@@ -0,0 +1,58 @@
+dnl Copyright 2001,2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+AC_DEFUN([GRC_FX2],[
+    GRC_ENABLE(usrp)
+
+    GRC_WITH(usrp)
+
+    dnl If execution gets to here, $passed will be:
+    dnl   with : if the --with code didn't error out
+    dnl   yes  : if the --enable code passed muster and all dependencies are met
+    dnl   no   : otherwise
+    if test $passed = yes; then
+        dnl gnulib.
+        dnl FIXME: this needs to fail gracefully and continue, not implemented yet
+        UTILS_FUNC_MKSTEMP
+
+        dnl These checks don't fail
+        AC_C_BIGENDIAN
+        AC_CHECK_HEADERS([byteswap.h linux/compiler.h])
+        AC_CHECK_FUNCS([getrusage sched_setscheduler pthread_setschedparam])
+        AC_CHECK_FUNCS([sigaction snprintf])
+
+	dnl Make sure SDCC >= 2.4.0 is available.
+        USRP_SDCC([2.4.0],[],[passed=no;AC_MSG_RESULT([Unable to find firmware compiler SDCC.])])
+    fi
+    if test $passed != with; then
+	dnl how and where to find INCLUDES and LA
+	usrp_INCLUDES=" \
+		-I\${abs_top_srcdir}/include"
+    fi
+
+    AC_CONFIG_FILES([ \
+        include/Makefile \
+        lib/Makefile \
+        src/Makefile \
+        src/common/Makefile \
+        src/usrp1/Makefile \
+    ])
+
+    GRC_BUILD_CONDITIONAL(usrp)
+])
diff --git a/firmware/fx2/config/lf_cc.m4 b/firmware/fx2/config/lf_cc.m4
new file mode 100644
index 000000000..b75e1a4c5
--- /dev/null
+++ b/firmware/fx2/config/lf_cc.m4
@@ -0,0 +1,41 @@
+dnl Autoconf support for C++
+dnl Copyright (C) 1988 Eleftherios Gkioulekas <lf@amath.washington.edu>
+dnl  
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl 
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software 
+dnl Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301, USA.
+dnl 
+dnl As a special exception to the GNU General Public License, if you 
+dnl distribute this file as part of a program that contains a configuration 
+dnl script generated by Autoconf, you may include it under the same 
+dnl distribution terms that you use for the rest of that program.
+
+# -------------------------------------------------------------------------
+# Use this macro to configure your C compiler
+# When called the macro does the following things:
+# 1. It finds an appropriate C compiler.
+#    If you passed the flag --with-cc=foo then it uses that
+#    particular compiler
+# 2. Check whether the compiler works.
+# 3. Checks whether the compiler accepts the -g 
+# -------------------------------------------------------------------------
+
+AC_DEFUN([LF_CONFIGURE_CC],[
+  dnl Sing the song
+  AC_REQUIRE([AC_PROG_CC])dnl
+  AC_REQUIRE([AC_PROG_CPP])dnl
+  AC_REQUIRE([AC_AIX])dnl
+  AC_REQUIRE([AC_ISC_POSIX])dnl
+  AC_REQUIRE([AC_HEADER_STDC])dnl
+])
+
diff --git a/firmware/fx2/config/lf_cxx.m4 b/firmware/fx2/config/lf_cxx.m4
new file mode 100644
index 000000000..dfc6bfbfe
--- /dev/null
+++ b/firmware/fx2/config/lf_cxx.m4
@@ -0,0 +1,67 @@
+dnl Autoconf support for C++
+dnl Copyright (C) 1988 Eleftherios Gkioulekas <lf@amath.washington.edu>
+dnl  
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl 
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software 
+dnl Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301, USA.
+dnl 
+dnl As a special exception to the GNU General Public License, if you 
+dnl distribute this file as part of a program that contains a configuration 
+dnl script generated by Autoconf, you may include it under the same 
+dnl distribution terms that you use for the rest of that program.
+
+# -----------------------------------------------------------------
+# This macro should be called to configure your C++ compiler.
+# When called, the macro does the following things:
+# 1. It finds an appropriate C++ compiler
+#    If you passed the flag --with-cxx=foo, then it uses that
+#    particular compiler
+# 2. Checks whether the compiler accepts the -g 
+# ------------------------------------------------------------------
+
+AC_DEFUN([LF_CONFIGURE_CXX],[
+ AC_REQUIRE([AC_PROG_CXX])dnl
+ AC_REQUIRE([AC_PROG_CXXCPP])dnl
+ LF_CXX_PORTABILITY
+])
+
+# -----------------------------------------------------------------------
+# This macro tests the C++ compiler for various portability problem.
+# -----------------------------------------------------------------------
+
+
+AC_DEFUN([LF_CXX_PORTABILITY],[
+
+  dnl
+  dnl Check for common C++ portability problems
+  dnl
+
+  dnl AC_LANG_PUSH
+  dnl AC_LANG_CPLUSPLUS
+  AC_LANG_SAVE
+  AC_LANG_CPLUSPLUS
+
+
+  dnl Test whether C++ has std::isnan
+  AC_MSG_CHECKING(whether C++ has std::isnan)
+  AC_TRY_COMPILE([#include <cmath>], [
+   std::isnan(0);
+], [ AC_MSG_RESULT(yes)
+	AC_DEFINE(CXX_HAS_STD_ISNAN,[],[Define if has std::isnan]) ],
+   [ AC_MSG_RESULT(no) ])
+
+  dnl Done with the portability checks
+  dnl AC_LANG_POP([C++])
+  AC_LANG_RESTORE
+])
+
diff --git a/firmware/fx2/config/lf_warnings.m4 b/firmware/fx2/config/lf_warnings.m4
new file mode 100644
index 000000000..d40c77f14
--- /dev/null
+++ b/firmware/fx2/config/lf_warnings.m4
@@ -0,0 +1,121 @@
+dnl Copyright (C) 1988 Eleftherios Gkioulekas <lf@amath.washington.edu>
+dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl  
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl 
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software 
+dnl Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301, USA.
+dnl 
+dnl As a special exception to the GNU General Public License, if you 
+dnl distribute this file as part of a program that contains a configuration 
+dnl script generated by Autoconf, you may include it under the same 
+dnl distribution terms that you use for the rest of that program.
+
+# --------------------------------------------------------------------------
+# Check whether the C++ compiler accepts a certain flag
+# If it does it adds the flag to lf_CXXFLAGS
+# If it does not then it returns an error to lf_ok
+# Usage:
+#   LF_CHECK_CXX_FLAG(-flag1 -flag2 -flag3 ...)
+# -------------------------------------------------------------------------
+
+AC_DEFUN([LF_CHECK_CXX_FLAG],[
+  echo 'void f(){}' > conftest.cc
+  for i in $1
+  do
+    AC_MSG_CHECKING([whether $CXX accepts $i])
+    if test -z "`${CXX} $i -c conftest.cc 2>&1`"
+    then
+      lf_CXXFLAGS="${lf_CXXFLAGS} $i"
+      AC_MSG_RESULT(yes)
+    else
+      AC_MSG_RESULT(no)
+    fi
+  done
+  rm -f conftest.cc conftest.o
+  AC_SUBST(lf_CXXFLAGS)
+])
+
+# --------------------------------------------------------------------------
+# Check whether the C compiler accepts a certain flag
+# If it does it adds the flag to lf_CFLAGS
+# If it does not then it returns an error to lf_ok
+# Usage:
+#  LF_CHECK_CC_FLAG(-flag1 -flag2 -flag3 ...)
+# -------------------------------------------------------------------------
+
+AC_DEFUN([LF_CHECK_CC_FLAG],[
+  echo 'void f(){}' > conftest.c
+  for i in $1
+  do
+    AC_MSG_CHECKING([whether $CC accepts $i])
+    if test -z "`${CC} $i -c conftest.c 2>&1`"
+    then
+      lf_CFLAGS="${lf_CFLAGS} $i"
+      AC_MSG_RESULT(yes)
+    else
+      AC_MSG_RESULT(no)
+    fi
+  done
+  rm -f conftest.c conftest.o
+  AC_SUBST(lf_CFLAGS)
+])
+
+# --------------------------------------------------------------------------
+# Check whether the Fortran compiler accepts a certain flag
+# If it does it adds the flag to lf_FFLAGS
+# If it does not then it returns an error to lf_ok
+# Usage:
+#  LF_CHECK_F77_FLAG(-flag1 -flag2 -flag3 ...)
+# -------------------------------------------------------------------------
+
+AC_DEFUN([LF_CHECK_F77_FLAG],[
+  cat << EOF > conftest.f
+c....:++++++++++++++++++++++++
+      PROGRAM MAIN
+      PRINT*,'Hello World!'
+      END
+EOF
+  for i in $1
+  do
+    AC_MSG_CHECKING([whether $F77 accepts $i])
+    if test -z "`${F77} $i -c conftest.f 2>&1`"
+    then
+      lf_FFLAGS="${lf_FFLAGS} $i"
+      AC_MSG_RESULT(yes)  
+    else
+      AC_MSG_RESULT(no)
+    fi
+  done
+  rm -f conftest.f conftest.o
+  AC_SUBST(lf_FFLAGS)
+])
+
+# ----------------------------------------------------------------------
+# Enable compiler warnings. 
+# Call this command AFTER you have configured ALL your compilers. 
+# ----------------------------------------------------------------------
+
+AC_DEFUN([LF_SET_WARNINGS],[
+  dnl Warnings for the two main compilers
+  dnl add -Wextra when you're got time to fix a bunch of them ;-)
+  cc_warning_flags="-Wall -Werror-implicit-function-declaration"
+  cxx_warning_flags="-Wall -Woverloaded-virtual"
+  if test -n "${CC}"
+  then
+    LF_CHECK_CC_FLAG($cc_warning_flags)
+  fi
+  if test -n "${CXX}" 
+  then
+    LF_CHECK_CXX_FLAG($cxx_warning_flags)
+  fi
+])
diff --git a/firmware/fx2/config/mkstemp.m4 b/firmware/fx2/config/mkstemp.m4
new file mode 100644
index 000000000..4af0f0a9b
--- /dev/null
+++ b/firmware/fx2/config/mkstemp.m4
@@ -0,0 +1,89 @@
+#serial 4
+
+# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
+# silly limit that it can create no more than 26 files from a given template.
+# Other systems lack mkstemp altogether.
+# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
+# only 32 files per process.
+# On systems like the above, arrange to use the replacement function.
+AC_DEFUN([UTILS_FUNC_MKSTEMP],
+[dnl
+  AC_REPLACE_FUNCS(mkstemp)
+  if test $ac_cv_func_mkstemp = no; then
+    utils_cv_func_mkstemp_limitations=yes
+  else
+    AC_CACHE_CHECK([for mkstemp limitations],
+      utils_cv_func_mkstemp_limitations,
+      [
+	AC_TRY_RUN([
+#         include <stdlib.h>
+	  int main ()
+	  {
+	    int i;
+	    for (i = 0; i < 70; i++)
+	      {
+		char template[] = "conftestXXXXXX";
+		int fd = mkstemp (template);
+		if (fd == -1)
+		  exit (1);
+		close (fd);
+	      }
+	    exit (0);
+	  }
+	  ],
+	utils_cv_func_mkstemp_limitations=no,
+	utils_cv_func_mkstemp_limitations=yes,
+	utils_cv_func_mkstemp_limitations=yes
+	)
+      ]
+    )
+  fi
+
+  if test $utils_cv_func_mkstemp_limitations = yes; then
+    AC_LIBOBJ(mkstemp)
+    AC_LIBOBJ(tempname)
+    AC_DEFINE(mkstemp, rpl_mkstemp,
+      [Define to rpl_mkstemp if the replacement function should be used.])
+    gl_PREREQ_MKSTEMP
+    jm_PREREQ_TEMPNAME
+  fi
+])
+
+# Prerequisites of lib/mkstemp.c.
+AC_DEFUN([gl_PREREQ_MKSTEMP],
+[
+  AH_BOTTOM(
+  [
+  #ifndef HAVE_MKSTEMP
+  #ifdef  __cplusplus
+  extern "C" {
+  #endif
+  int rpl_mkstemp (char *templ);
+  #ifdef  __cplusplus
+  }
+  #endif
+  #endif
+  ])
+])
+
+# Prerequisites of lib/tempname.c.
+AC_DEFUN([jm_PREREQ_TEMPNAME],
+[
+  AC_REQUIRE([AC_HEADER_STAT])
+  AC_CHECK_HEADERS_ONCE(fcntl.h sys/time.h unistd.h)
+  AC_CHECK_HEADERS(stdint.h)
+  AC_CHECK_FUNCS(__secure_getenv gettimeofday lstat)
+  AC_CHECK_DECLS_ONCE(getenv)
+  # AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
+
+  dnl Under Win32, mkdir prototype in io.h has only one arg
+  AC_MSG_CHECKING(whether mkdir accepts only one arg)
+  AC_TRY_COMPILE([#include <sys/types.h>
+       #include <sys/stat.h>
+       #include <fcntl.h>], [
+       mkdir("")
+  ], [ AC_MSG_RESULT(yes)
+     AC_DEFINE(MKDIR_TAKES_ONE_ARG,[],[Define if mkdir accepts only one arg]) ],
+   [ AC_MSG_RESULT(no)
+     ])
+])
diff --git a/firmware/fx2/config/onceonly.m4 b/firmware/fx2/config/onceonly.m4
new file mode 100644
index 000000000..f6fec37cb
--- /dev/null
+++ b/firmware/fx2/config/onceonly.m4
@@ -0,0 +1,63 @@
+# onceonly.m4 serial 3
+dnl Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl This file defines some "once only" variants of standard autoconf macros.
+dnl   AC_CHECK_HEADERS_ONCE         like  AC_CHECK_HEADERS
+dnl   AC_CHECK_FUNCS_ONCE           like  AC_CHECK_FUNCS
+dnl   AC_CHECK_DECLS_ONCE           like  AC_CHECK_DECLS
+dnl   AC_REQUIRE([AC_HEADER_STDC])  like  AC_HEADER_STDC
+dnl The advantage is that the check for each of the headers/functions/decls
+dnl will be put only once into the 'configure' file. It keeps the size of
+dnl the 'configure' file down, and avoids redundant output when 'configure'
+dnl is run.
+dnl The drawback is that the checks cannot be conditionalized. If you write
+dnl   if some_condition; then gl_CHECK_HEADERS(stdlib.h); fi
+dnl inside an AC_DEFUNed function, the gl_CHECK_HEADERS macro call expands to
+dnl empty, and the check will be inserted before the body of the AC_DEFUNed
+dnl function.
+
+dnl Autoconf version 2.57 or newer is recommended.
+AC_PREREQ(2.54)
+
+# AC_CHECK_HEADERS_ONCE(HEADER1 HEADER2 ...) is a once-only variant of
+# AC_CHECK_HEADERS(HEADER1 HEADER2 ...).
+AC_DEFUN([AC_CHECK_HEADERS_ONCE], [
+  :
+  AC_FOREACH([gl_HEADER_NAME], [$1], [
+    AC_DEFUN([gl_CHECK_HEADER_]m4_quote(translit(defn([gl_HEADER_NAME]),
+                                                 [-./], [___])), [
+      AC_CHECK_HEADERS(gl_HEADER_NAME)
+    ])
+    AC_REQUIRE([gl_CHECK_HEADER_]m4_quote(translit(gl_HEADER_NAME,
+                                                   [-./], [___])))
+  ])
+])
+
+# AC_CHECK_FUNCS_ONCE(FUNC1 FUNC2 ...) is a once-only variant of
+# AC_CHECK_FUNCS(FUNC1 FUNC2 ...).
+AC_DEFUN([AC_CHECK_FUNCS_ONCE], [
+  :
+  AC_FOREACH([gl_FUNC_NAME], [$1], [
+    AC_DEFUN([gl_CHECK_FUNC_]defn([gl_FUNC_NAME]), [
+      AC_CHECK_FUNCS(defn([gl_FUNC_NAME]))
+    ])
+    AC_REQUIRE([gl_CHECK_FUNC_]defn([gl_FUNC_NAME]))
+  ])
+])
+
+# AC_CHECK_DECLS_ONCE(DECL1 DECL2 ...) is a once-only variant of
+# AC_CHECK_DECLS(DECL1, DECL2, ...).
+AC_DEFUN([AC_CHECK_DECLS_ONCE], [
+  :
+  AC_FOREACH([gl_DECL_NAME], [$1], [
+    AC_DEFUN([gl_CHECK_DECL_]defn([gl_DECL_NAME]), [
+      AC_CHECK_DECLS(defn([gl_DECL_NAME]))
+    ])
+    AC_REQUIRE([gl_CHECK_DECL_]defn([gl_DECL_NAME]))
+  ])
+])
diff --git a/firmware/fx2/config/pkg.m4 b/firmware/fx2/config/pkg.m4
new file mode 100644
index 000000000..2d4d96109
--- /dev/null
+++ b/firmware/fx2/config/pkg.m4
@@ -0,0 +1,201 @@
+# pkg.m4 - Macros to locate and utilise pkg-config.            -*- Autoconf -*-
+# 
+# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
+# Copyright © 2008 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# PKG_PROG_PKG_CONFIG([MIN-VERSION])
+# ----------------------------------
+AC_DEFUN([PKG_PROG_PKG_CONFIG],
+[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
+m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
+AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+	AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+fi
+if test -n "$PKG_CONFIG"; then
+	_pkg_min_version=m4_default([$1], [0.18])
+	AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
+	if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+		AC_MSG_RESULT([yes])
+	else
+		AC_MSG_RESULT([no])
+		PKG_CONFIG=""
+	fi
+		
+fi[]dnl
+])# PKG_PROG_PKG_CONFIG
+
+# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+#
+# Check to see whether a particular set of modules exists.  Similar
+# to PKG_CHECK_MODULES(), but does not set variables or print errors.
+#
+#
+# Similar to PKG_CHECK_MODULES, make sure that the first instance of
+# this or PKG_CHECK_MODULES is called, or make sure to call
+# PKG_CHECK_EXISTS manually
+# --------------------------------------------------------------
+AC_DEFUN([PKG_CHECK_EXISTS],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+if test -n "$PKG_CONFIG" && \
+    AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
+  m4_ifval([$2], [$2], [:])
+m4_ifvaln([$3], [else
+  $3])dnl
+fi])
+
+
+# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
+# ---------------------------------------------
+m4_define([_PKG_CONFIG],
+[if test -n "$PKG_CONFIG"; then
+    if test -n "$$1"; then
+        pkg_cv_[]$1="$$1"
+    else
+        PKG_CHECK_EXISTS([$3],
+                         [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
+			 [pkg_failed=yes])
+    fi
+else
+	pkg_failed=untried
+fi[]dnl
+])# _PKG_CONFIG
+
+# _PKG_SHORT_ERRORS_SUPPORTED
+# -----------------------------
+AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi[]dnl
+])# _PKG_SHORT_ERRORS_SUPPORTED
+
+
+# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
+# [ACTION-IF-NOT-FOUND])
+#
+# E.g.,
+#   PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
+#   defines:
+#
+#     GSTUFF_LIBS
+#     GSTUFF_CFLAGS
+#     GSTUFF_INCLUDEDIR
+#     GSTUFF_CPPFLAGS    # the -I, -D and -U's out of CFLAGS
+#
+# see pkg-config man page also defines GSTUFF_PKG_ERRORS on error
+#
+# Note that if there is a possibility the first call to
+# PKG_CHECK_MODULES might not happen, you should be sure to include an
+# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
+#
+# --------------------------------------------------------------
+AC_DEFUN([PKG_CHECK_MODULES],[
+AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
+
+AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
+AC_ARG_VAR([$1][_INCLUDEDIR], [includedir for $1, overriding pkg-config])dnl
+
+pkg_failed=no
+AC_MSG_CHECKING([for $1])
+
+_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
+
+if test x$cross_compiling = xyes
+then
+  dnl _PKG_CONFIG([$1][_LIBS], [libs-only-l --static], [$2])
+  _PKG_CONFIG([$1][_LIBS], [libs --static], [$2])
+  dnl prune out any -L/lib or -L/usr/lib since they're pointing to the wrong filesystem root
+  _pkg_tmp=
+  for flag in [$]pkg_cv_[$1][_LIBS]; do
+    case $flag in
+    (-L/lib* | -L/usr/lib* )	   ;; # ignore
+    (*) _pkg_tmp="$_pkg_tmp $flag" ;;
+    esac
+  done
+  pkg_cv_[$1][_LIBS]="$_pkg_tmp"
+else
+  _PKG_CONFIG([$1][_LIBS], [libs --static], [$2])
+fi
+
+_PKG_CONFIG([$1][_INCLUDEDIR], [variable=includedir], [$2])
+
+
+m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
+and $1[]_LIBS to avoid the need to call pkg-config.
+See the pkg-config man page for more details.])
+
+if test $pkg_failed = yes; then
+        _PKG_SHORT_ERRORS_SUPPORTED
+        if test $_pkg_short_errors_supported = yes; then
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"`
+        else 
+	        $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
+
+	ifelse([$4], , [AC_MSG_ERROR(dnl
+[Package requirements ($2) were not met:
+
+$$1_PKG_ERRORS
+
+Consider adjusting the PKG_CONFIG_PATH environment variable if you
+installed software in a non-standard prefix.
+
+_PKG_TEXT
+])],
+		[AC_MSG_RESULT([no])
+                $4])
+elif test $pkg_failed = untried; then
+	ifelse([$4], , [AC_MSG_FAILURE(dnl
+[The pkg-config script could not be found or is too old.  Make sure it
+is in your PATH or set the PKG_CONFIG environment variable to the full
+path to pkg-config.
+
+_PKG_TEXT
+
+To get pkg-config, see <http://pkg-config.freedesktop.org/>.])],
+		[$4])
+else
+	$1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
+	$1[]_LIBS=$pkg_cv_[]$1[]_LIBS
+	$1[]_INCLUDEDIR=$pkg_cv_[]$1[]_INCLUDEDIR
+
+	$1[]_CPPFLAGS=""
+	for flag in $$1[]_CFLAGS; do
+	  case $flag in
+          -I* | -D* | -U*) $1[]_CPPFLAGS="$$1[]_CPPFLAGS $flag" ;;
+          esac
+        done
+	pkg_cv_[]$1[]_CPPFLAGS=$$1[]_CPPFLAGS
+	AC_SUBST($1[]_CPPFLAGS)
+
+        AC_MSG_RESULT([yes])
+	ifelse([$3], , :, [$3])
+fi[]dnl
+])# PKG_CHECK_MODULES
diff --git a/firmware/fx2/config/usrp_sdcc.m4 b/firmware/fx2/config/usrp_sdcc.m4
new file mode 100644
index 000000000..86f6429e5
--- /dev/null
+++ b/firmware/fx2/config/usrp_sdcc.m4
@@ -0,0 +1,75 @@
+# Check for sdcc support.             		-*- Autoconf -*-
+
+# Copyright 2004 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Boston, MA
+# 02110-1301, USA.
+
+AC_DEFUN([USRP_SDCC],
+[
+	sdccok=yes
+	AC_CHECK_PROG(XCC, sdcc, sdcc -mmcs51 --no-xinit-opt,no)
+	AC_CHECK_PROG(XAS, asx8051, asx8051 -plosgff,no)
+
+	if test "$XCC" = "no" -o "$XAS" = "no" ; then
+		AC_MSG_RESULT([USRP requires sdcc. sdcc not found. See http://sdcc.sf.net])
+		sdccok=no
+	else
+		sdcc_version_min=$1
+
+		sdcc_version=`sdcc --version 2>&1 | \
+			sed  's/\(SDCC.* \)\([[0-9]]*\.[[0-9]]*\.[[0-9]]*\)\( .*$\)/\2/'`
+
+	        AC_MSG_CHECKING([sdcc_version "$sdcc_version"])
+
+		sdcc_major_version=`echo $sdcc_version | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+		sdcc_minor_version=`echo $sdcc_version | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+		sdcc_micro_version=`echo $sdcc_version | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+
+		sdcc_major_min=`echo $sdcc_version_min | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+		sdcc_minor_min=`echo $sdcc_version_min | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+		sdcc_micro_min=`echo $sdcc_version_min | \
+			sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+
+		sdcc_version_proper=`expr \
+			"$sdcc_major_version" \> "$sdcc_major_min" \| \
+			"$sdcc_major_version" \= "$sdcc_major_min" \& \
+	    		"$sdcc_minor_version" \> "$sdcc_minor_min" \| \
+			"$sdcc_major_version" \= "$sdcc_major_min" \& \
+			"$sdcc_minor_version" \= "$sdcc_minor_min" \& \
+			"$sdcc_micro_version" \>= "$sdcc_micro_min" `
+
+		if test "$sdcc_version_proper" = "1" ; then
+			AC_MSG_RESULT([$sdcc_major_version.$sdcc_minor_version.$sdcc_micro_version])
+		else
+			sdccok=no
+			AC_MSG_RESULT([USRP requires sdcc >= $sdcc_version_min. sdcc not found. See http://sdcc.sf.net])
+		fi
+
+		AC_SUBST(XCC)
+		AC_SUBST(XAS)
+	fi
+
+	if test $sdccok = yes; then
+		ifelse([$2], , :, [$2])
+	else
+		ifelse([$3], , :, [$3])
+	fi
+])
diff --git a/firmware/fx2/configure.ac b/firmware/fx2/configure.ac
new file mode 100644
index 000000000..a4fa59c2e
--- /dev/null
+++ b/firmware/fx2/configure.ac
@@ -0,0 +1,335 @@
+dnl Copyright 2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
+dnl 
+dnl This file is part of GNU Radio
+dnl 
+dnl GNU Radio is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3, or (at your option)
+dnl any later version.
+dnl 
+dnl GNU Radio is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl 
+dnl You should have received a copy of the GNU General Public License
+dnl along with GNU Radio; see the file COPYING.  If not, write to
+dnl the Free Software Foundation, Inc., 51 Franklin Street,
+dnl Boston, MA 02110-1301, USA.
+
+AC_INIT
+AC_PREREQ(2.57)
+AM_CONFIG_HEADER(config.h)
+
+AC_CANONICAL_BUILD
+AC_CANONICAL_HOST
+AC_CANONICAL_TARGET
+
+dnl ustar required to have pathnames > 99 chars
+_AM_SET_OPTION([tar-ustar])
+AM_INIT_AUTOMAKE(gnuradio,$RELEASE)
+
+DEFINES=""
+AC_SUBST(DEFINES)
+
+dnl Remember if the user explicity set CFLAGS
+if test -n "${CFLAGS}"; then
+  user_set_cflags=yes
+fi
+dnl Remember if the user explicity set CXXFLAGS
+if test -n "${CXXFLAGS}"; then
+  user_set_cxxflags=yes
+fi
+
+
+LF_CONFIGURE_CC
+LF_CONFIGURE_CXX
+GR_LIB64		dnl check for lib64 suffix after choosing compilers
+
+
+dnl The three macros above are known to override CFLAGS if the user
+dnl didn't specify them.  Though I'm sure somebody thought this was
+dnl a good idea, it makes it hard to use other than -g -O2 when compiling
+dnl selected files.  Thus we "undo" the damage here...
+dnl 
+dnl If the user specified CFLAGS, we use them.
+dnl See Makefile.common for the rest of the magic.
+if test "$user_set_cflags" != yes; then
+  autoconf_default_CFLAGS="$CFLAGS"
+  CFLAGS=""
+fi
+AC_SUBST(autoconf_default_CFLAGS)
+
+
+dnl The three macros above are known to override CXXFLAGS if the user
+dnl didn't specify them.  Though I'm sure somebody thought this was
+dnl a good idea, it makes it hard to use other than -g -O2 when compiling
+dnl selected files.  Thus we "undo" the damage here...
+dnl 
+dnl If the user specified CXXFLAGS, we use them.  Otherwise when compiling
+dnl the output of swig use use -O1 if we're using g++.
+dnl See Makefile.common for the rest of the magic.
+if test "$user_set_cxxflags" != yes; then
+  autoconf_default_CXXFLAGS="$CXXFLAGS"
+  CXXFLAGS=""
+  if test "$GXX" = yes; then
+    case "$host_cpu" in
+    	powerpc*)
+	   dnl "-O1" is broken on the PPC for some reason
+	   dnl (at least as of g++ 4.1.1)
+	   swig_CXXFLAGS="-g1 -O2 -Wno-strict-aliasing -Wno-parentheses"
+	;;
+    	*) 
+	swig_CXXFLAGS="-g -O1 -Wno-strict-aliasing -Wno-parentheses"
+	;;
+    esac
+  fi
+fi
+AC_SUBST(autoconf_default_CXXFLAGS)
+AC_SUBST(swig_CXXFLAGS)
+
+dnl add ${prefix}/lib${gr_libdir_suffix}/pkgconfig to the head of the PKG_CONFIG_PATH
+if test x${PKG_CONFIG_PATH} = x; then
+    PKG_CONFIG_PATH=${prefix}/lib${gr_libdir_suffix}/pkgconfig
+else
+    PKG_CONFIG_PATH=${prefix}/lib${gr_libdir_suffix}/pkgconfig:${PKG_CONFIG_PATH}
+fi
+export PKG_CONFIG_PATH
+
+LF_SET_WARNINGS
+AM_PROG_AS
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+AC_PROG_INSTALL
+
+# AC_PROG_MKDIR_P
+# is a backport of autoconf-2.60's AC_PROG_MKDIR_P.
+# Remove this macro when we can assume autoconf >= 2.60.
+m4_ifdef([AC_PROG_MKDIR_P], [], [
+  AC_DEFUN([AC_PROG_MKDIR_P],
+    [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
+     MKDIR_P='$(mkdir_p)'
+     AC_SUBST([MKDIR_P])])
+])
+AC_PROG_MKDIR_P
+
+AC_PATH_PROG([RM_PROG], [rm])
+
+AC_LIBTOOL_WIN32_DLL
+dnl AC_DISABLE_SHARED	dnl don't build shared libraries
+AC_ENABLE_SHARED	dnl do build shared libraries
+AC_DISABLE_STATIC	dnl don't build static libraries
+m4_ifdef([LT_INIT],[LT_INIT],[AC_PROG_LIBTOOL])
+dnl GR_FORTRAN
+
+GR_NO_UNDEFINED		dnl do we need the -no-undefined linker flag
+GR_SCRIPTING
+
+
+AM_CONDITIONAL([PYTHON], [test x$enable_python = xyes])
+
+dnl Checks for libraries.
+AC_CHECK_LIB(socket,socket)
+
+dnl Set the c++ compiler that we use for the build system when cross compiling
+if test x$CXX_FOR_BUILD = x
+then
+  if test x$cross_compiling = xno; then
+    CXX_FOR_BUILD=${CXX}
+  else
+    CXX_FOR_BUILD=g++
+  fi
+fi
+AC_SUBST(CXX_FOR_BUILD)
+
+dnl Checks for header files.
+AC_HEADER_STDC
+AC_HEADER_SYS_WAIT
+AC_CHECK_HEADERS(fcntl.h limits.h strings.h time.h sys/ioctl.h sys/time.h unistd.h)
+AC_CHECK_HEADERS(linux/ppdev.h dev/ppbus/ppi.h sys/mman.h sys/select.h sys/types.h)
+AC_CHECK_HEADERS(sys/resource.h stdint.h sched.h signal.h sys/syscall.h malloc.h)
+AC_CHECK_HEADERS(windows.h)
+AC_CHECK_HEADERS(vec_types.h)
+AC_CHECK_HEADERS(netdb.h netinet/in.h arpa/inet.h sys/types.h sys/socket.h)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_C_INLINE
+AC_TYPE_SIZE_T
+AC_HEADER_TIME
+AC_C_BIGENDIAN([GR_ARCH_BIGENDIAN=1],[GR_ARCH_BIGENDIAN=0])
+AC_SUBST(GR_ARCH_BIGENDIAN)
+AC_STRUCT_TM
+
+dnl Checks for library functions.
+AC_FUNC_ALLOCA
+AC_FUNC_SETVBUF_REVERSED
+AC_FUNC_VPRINTF
+AC_CHECK_FUNCS([mmap select socket strcspn strerror strspn getpagesize sysconf])
+AC_CHECK_FUNCS([snprintf gettimeofday nanosleep sched_setscheduler])
+AC_CHECK_FUNCS([modf sqrt sigaction sigprocmask pthread_sigmask])
+AC_CHECK_FUNCS([sched_setaffinity])
+
+AC_CHECK_LIB(m, sincos, [AC_DEFINE([HAVE_SINCOS],[1],[Define to 1 if your system has `sincos'.])])
+AC_CHECK_LIB(m, sincosf,[AC_DEFINE([HAVE_SINCOSF],[1],[Define to 1 if your system has `sincosf'.])])
+AC_CHECK_LIB(m, sinf, [AC_DEFINE([HAVE_SINF],[1],[Define to 1 if your system has `sinf'.])])
+AC_CHECK_LIB(m, cosf, [AC_DEFINE([HAVE_COSF],[1],[Define to 1 if your system has `cosf'.])])
+AC_CHECK_LIB(m, trunc, [AC_DEFINE([HAVE_TRUNC],[1],[Define to 1 if your system has `trunc'.])])
+AC_CHECK_LIB(m, exp10, [AC_DEFINE([HAVE_EXP10],[1],[Define to 1 if your system has 'exp10'.])])
+AC_CHECK_LIB(m, log2, [AC_DEFINE([HAVE_LOG2],[1],[Define to 1 if your system has 'log2'.])])
+#AC_FUNC_MKTIME
+
+AH_BOTTOM([
+#ifndef HAVE_TRUNC
+#include <math.h>
+inline static double trunc(double x)
+{
+  return x >= 0 ? floor(x) : ceil(x);
+}
+#endif
+
+#ifndef HAVE_EXP10
+#include <math.h>
+inline static double exp10(double x)
+{
+  return pow(10.0, x);
+}
+#endif
+
+#ifdef HAVE_WINDOWS_H
+#define NOMINMAX
+#endif
+])
+
+dnl Do we have "dot", part of the graphviz package from AT&T?
+dnl Doxgen will use it to draw pretty diagrams ;-)
+AC_CHECK_PROG(HAVE_DOT, [dot],[YES],[NO])
+
+PKG_CHECK_MODULES(FFTW3F, fftw3f >= 3.0)
+AC_SUBST(FFTW3F_LIBS)
+
+dnl Define where to look for cppunit includes and libs
+dnl sets CPPUNIT_CFLAGS and CPPUNIT_LIBS
+dnl Try using pkg-config first, then fall back to cppunit-config.
+PKG_CHECK_EXISTS(cppunit,
+  [PKG_CHECK_MODULES(CPPUNIT, cppunit >= 1.9.14)],
+  [AM_PATH_CPPUNIT([1.9.14],[],
+		[AC_MSG_ERROR([GNU Radio requires cppunit.  Stop])])])
+
+CPPUNIT_INCLUDES=$CPPUNIT_CFLAGS
+AC_SUBST(CPPUNIT_INCLUDES)
+
+dnl see if GUILE is installed
+AC_PATH_PROG(GUILE,guile)
+
+
+BUILD_DATE=`date -R -u`
+AC_SUBST(BUILD_DATE)
+
+dnl SYSCONFDIR substitution
+if test "${sysconfdir}" == "\${prefix}/etc" ; then
+   if test "${prefix}" == "NONE" ; then
+      SYSCONFDIR=["$ac_default_prefix/etc"]
+   else
+      SYSCONFDIR=["${prefix}/etc"]
+   fi
+else
+   SYSCONFDIR=[${sysconfdir}]
+fi
+AC_SUBST(SYSCONFDIR)
+
+dnl System configuration files
+GR_PREFSDIR=[$SYSCONFDIR/${PACKAGE}/conf.d]
+AC_SUBST(GR_PREFSDIR)
+
+dnl Component specific configuration
+dnl The order of the GR_ macros determines the order of compilation
+dnl For -any- checks on $enable_all_components
+dnl use the following guidelines:
+dnl   yes : --enable-all-components was specified, so error out if any
+dnl         components do not pass configuration checks.
+dnl   no  : --disable-all-components was specified, so try to build the
+dnl         --enable'd components, and error out if any do not pass
+dnl         configuration checks.
+dnl   ""  : this option was not specified on the command line; try to
+dnl         build all components that are not --with'd, but don't
+dnl         error out if any component does not pass configuration checks.
+dnl
+dnl For each --enable-foo component, if that flag is not specified on
+dnl the command line, the related variable $enable_foo will be set to
+dnl $enable_all_components .
+
+AC_ARG_ENABLE(
+    [all-components],
+    [  --enable-all-components Build all configurable components (default), or stop on failed dependencies]
+)
+
+build_dirs="config"
+GRC_FX2
+
+# Each component is now either to be built, was skipped, will be
+# included from pre-installed libraries and includes, or failed
+# dependencies.
+AC_SUBST([build_dirs], [$build_dirs])
+AC_SUBST([skipped_dirs], [$skipped_dirs])
+AC_SUBST([with_dirs], [$with_dirs])
+
+# fix for older autotools that don't define these by default
+AC_SUBST(abs_top_srcdir)
+AC_SUBST(abs_top_builddir)
+AC_SUBST(MKDIR_P)
+
+# 'with' variables - the pre-installed libraries, includes, and paths
+# - must always come last in the lists, so they require special
+# treatment.
+AC_SUBST(with_INCLUDES)
+AC_SUBST(with_PYDIRPATH)
+AC_SUBST(with_LIBDIRPATH)
+
+# Local files tweaked by AC
+AC_CONFIG_FILES([\
+    Makefile \
+    config/Makefile \
+])
+
+AC_OUTPUT
+
+echo
+echo "*********************************************************************"
+echo The following GNU Radio components have been successfully configured:
+echo 
+for dir in $build_dirs
+do
+    echo $dir
+done
+echo
+echo You my now run the 'make' command to build these components.
+echo
+if test "$skipped_dirs" != ""; then
+    echo "*********************************************************************"
+    echo The following components were skipped either because you asked not
+    echo to build them or they didn\'t pass configuration checks:
+    echo
+    for dir in $skipped_dirs
+    do
+        echo $dir
+    done
+    echo
+    echo These components will not be built.
+    echo
+fi
+if test "$with_dirs" != ""; then
+    echo "*********************************************************************"
+    echo The following components will be included from pre-installed
+    echo libraries and includes:
+    echo
+    for dir in $with_dirs
+    do
+        echo $dir
+    done
+    echo
+    echo These components will not be built.
+    echo
+fi
+
+echo Configured GNU Radio release $RELEASE for build.
diff --git a/firmware/fx2/include/.gitignore b/firmware/fx2/include/.gitignore
new file mode 100644
index 000000000..75bb241c8
--- /dev/null
+++ b/firmware/fx2/include/.gitignore
@@ -0,0 +1,25 @@
+/Makefile
+/Makefile.in
+/aclocal.m4
+/configure
+/config.h.in
+/stamp-h.in
+/libtool
+/config.log
+/config.h
+/config.cache
+/config.status
+/missing
+/stamp-h
+/stamp-h1
+/.la
+/.lo
+/.deps
+/.libs
+/*.la
+/*.lo
+/autom4te.cache
+/*.cache
+/missing
+/make.log
+/usrp.pc
diff --git a/firmware/fx2/include/Makefile.am b/firmware/fx2/include/Makefile.am
new file mode 100644
index 000000000..e17726c07
--- /dev/null
+++ b/firmware/fx2/include/Makefile.am
@@ -0,0 +1,61 @@
+#
+# Copyright 2003 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+usrpincludedir = $(includedir)/usrp
+
+usrpinclude_HEADERS = 		\
+	usrp_i2c_addr.h		\
+	usrp_spi_defs.h	        \
+	fpga_regs_common.h	\
+	fpga_regs_standard.h
+
+
+noinst_HEADERS =		\
+	delay.h			\
+	fpga_regs_common.v	\
+	fpga_regs_standard.v	\
+	fpga_regs0.h		\
+	fx2regs.h		\
+	fx2utils.h		\
+	i2c.h			\
+	isr.h			\
+	syncdelay.h		\
+	timer.h			\
+	usb_common.h		\
+	usb_descriptors.h	\
+	usb_requests.h		\
+	usrp_commands.h		\
+	usrp_config.h		\
+	usrp_ids.h		\
+	usrp_interfaces.h	
+
+
+CODE_GENERATOR = 		\
+	generate_regs.py	
+
+EXTRA_DIST = 			\
+	$(CODE_GENERATOR)
+
+fpga_regs_common.v: fpga_regs_common.h generate_regs.py 
+	PYTHONPATH=$(top_srcdir)/usrp/firmware/include $(PYTHON) $(srcdir)/generate_regs.py $(srcdir)/fpga_regs_common.h $@
+
+fpga_regs_standard.v: fpga_regs_standard.h generate_regs.py
+	PYTHONPATH=$(top_srcdir)/usrp/firmware/include $(PYTHON) $(srcdir)/generate_regs.py $(srcdir)/fpga_regs_standard.h $@
diff --git a/firmware/fx2/include/delay.h b/firmware/fx2/include/delay.h
new file mode 100644
index 000000000..f5df779e1
--- /dev/null
+++ b/firmware/fx2/include/delay.h
@@ -0,0 +1,38 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _DELAY_H_
+#define _DELAY_H_
+
+/*
+ * delay for approximately usecs microseconds
+ * Note limit of 255 usecs.
+ */
+void udelay (unsigned char usecs);
+
+/*
+ * delay for approximately msecs milliseconds
+ */
+void mdelay (unsigned short msecs);
+
+
+#endif /* _DELAY_H_ */
diff --git a/firmware/fx2/include/fpga_regs0.h b/firmware/fx2/include/fpga_regs0.h
new file mode 100644
index 000000000..883798301
--- /dev/null
+++ b/firmware/fx2/include/fpga_regs0.h
@@ -0,0 +1,42 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _FPGA_REGS0_H_
+#define _FPGA_REGS0_H_
+
+#define FR_RX_FREQ_0	   0
+#define FR_RX_FREQ_1	   1
+#define FR_RX_FREQ_2	   2
+#define FR_RX_FREQ_3	   3
+#define FR_TX_FREQ_0	   4
+#define FR_TX_FREQ_1	   5
+#define FR_TX_FREQ_2	   6
+#define FR_TX_FREQ_3	   7
+#define FR_COMBO	   8
+
+
+#define FR_ADC_CLK_DIV   128	// pseudo regs mapped to FR_COMBO by f/w
+#define FR_EXT_CLK_DIV	 129	
+#define FR_INTERP	 130
+#define FR_DECIM	 131
+
+#endif
diff --git a/firmware/fx2/include/fpga_regs_common.h b/firmware/fx2/include/fpga_regs_common.h
new file mode 100644
index 000000000..b4a496af7
--- /dev/null
+++ b/firmware/fx2/include/fpga_regs_common.h
@@ -0,0 +1,150 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.	If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDED_FPGA_REGS_COMMON_H
+#define INCLUDED_FPGA_REGS_COMMON_H
+
+// This file defines registers common to all FPGA configurations.
+// Registers 0 to 31 are reserved for use in this file.
+
+
+// The FPGA needs to know the rate that samples are coming from and
+// going to the A/D's and D/A's.  div = 128e6 / sample_rate
+
+#define	FR_TX_SAMPLE_RATE_DIV	 0
+#define	FR_RX_SAMPLE_RATE_DIV	 1
+
+// 2 and 3 are defined in the ATR section
+
+#define	FR_MASTER_CTRL		 4	// master enable and reset controls
+#  define  bmFR_MC_ENABLE_TX		(1 << 0)
+#  define  bmFR_MC_ENABLE_RX		(1 << 1)
+#  define  bmFR_MC_RESET_TX		(1 << 2)
+#  define  bmFR_MC_RESET_RX		(1 << 3)
+
+// i/o direction registers for pins that go to daughterboards.
+// Setting the bit makes it an output from the FPGA to the d'board.
+// top 16 is mask, low 16 is value
+
+#define	FR_OE_0			 5	// slot 0
+#define	FR_OE_1			 6
+#define	FR_OE_2			 7
+#define	FR_OE_3			 8
+
+// i/o registers for pins that go to daughterboards.
+// top 16 is a mask, low 16 is value
+
+#define	FR_IO_0			 9	// slot 0
+#define	FR_IO_1			10
+#define	FR_IO_2			11
+#define	FR_IO_3			12
+
+#define	FR_MODE			13
+#  define  bmFR_MODE_NORMAL		      0
+#  define  bmFR_MODE_LOOPBACK		(1 << 0)	// enable digital loopback
+#  define  bmFR_MODE_RX_COUNTING	(1 << 1)	// Rx is counting
+#  define  bmFR_MODE_RX_COUNTING_32BIT	(1 << 2)	// Rx is counting with a 32 bit counter
+                                                    // low and high 16 bits are multiplexed across channel I and Q
+
+
+// If the corresponding bit is set, internal FPGA debug circuitry
+// controls the i/o pins for the associated bank of daughterboard
+// i/o pins.  Typically used for debugging FPGA designs.
+
+#define FR_DEBUG_EN             14
+#  define bmFR_DEBUG_EN_TX_A           (1 << 0)        // debug controls TX_A i/o
+#  define bmFR_DEBUG_EN_RX_A           (1 << 1)        // debug controls RX_A i/o
+#  define bmFR_DEBUG_EN_TX_B           (1 << 2)        // debug controls TX_B i/o
+#  define bmFR_DEBUG_EN_RX_B           (1 << 3)        // debug controls RX_B i/o
+
+
+// If the corresponding bit is set, enable the automatic DC
+// offset correction control loop.
+//
+// The 4 low bits are significant:
+//
+//   ADC0 = (1 << 0)
+//   ADC1 = (1 << 1)
+//   ADC2 = (1 << 2)
+//   ADC3 = (1 << 3)
+//
+// This control loop works if the attached daugherboard blocks DC.
+// Currently all daughterboards do block DC.  This includes:
+// basic rx, dbs_rx, tv_rx, flex_xxx_rx.
+
+#define FR_DC_OFFSET_CL_EN	15			// DC Offset Control Loop Enable
+
+
+// offset corrections for ADC's and DAC's (2's complement)
+
+#define	FR_ADC_OFFSET_0	 	16
+#define	FR_ADC_OFFSET_1		17
+#define	FR_ADC_OFFSET_2	 	18
+#define	FR_ADC_OFFSET_3		19
+
+
+// ------------------------------------------------------------------------
+// Automatic Transmit/Receive switching
+//
+// If automatic transmit/receive (ATR) switching is enabled in the
+// FR_ATR_CTL register, the presence or absence of data in the FPGA
+// transmit fifo selects between two sets of values for each of the 4
+// banks of daughterboard i/o pins.
+//
+// Each daughterboard slot has 3 16-bit registers associated with it:
+//   FR_ATR_MASK_*, FR_ATR_TXVAL_* and FR_ATR_RXVAL_*
+//
+// FR_ATR_MASK_{0,1,2,3}: 
+//
+//   These registers determine which of the daugherboard i/o pins are
+//   affected by ATR switching.  If a bit in the mask is set, the
+//   corresponding i/o bit is controlled by ATR, else it's output
+//   value comes from the normal i/o pin output register:
+//   FR_IO_{0,1,2,3}.
+//
+// FR_ATR_TXVAL_{0,1,2,3}:
+// FR_ATR_RXVAL_{0,1,2,3}:
+//
+//   If the Tx fifo contains data, then the bits from TXVAL that are
+//   selected by MASK are output.  Otherwise, the bits from RXVAL that
+//   are selected by MASK are output.
+                      
+#define FR_ATR_MASK_0		20	// slot 0
+#define	FR_ATR_TXVAL_0		21
+#define FR_ATR_RXVAL_0		22
+
+#define FR_ATR_MASK_1		23	// slot 1
+#define	FR_ATR_TXVAL_1		24
+#define FR_ATR_RXVAL_1		25
+
+#define FR_ATR_MASK_2		26	// slot 2
+#define	FR_ATR_TXVAL_2		27
+#define FR_ATR_RXVAL_2		28
+
+#define FR_ATR_MASK_3		29	// slot 3
+#define	FR_ATR_TXVAL_3		30
+#define FR_ATR_RXVAL_3		31
+
+// Clock ticks to delay rising and falling edge of T/R signal
+#define FR_ATR_TX_DELAY          2
+#define FR_ATR_RX_DELAY          3
+
+#endif /* INCLUDED_FPGA_REGS_COMMON_H */
diff --git a/firmware/fx2/include/fpga_regs_common.v b/firmware/fx2/include/fpga_regs_common.v
new file mode 100644
index 000000000..8035d8565
--- /dev/null
+++ b/firmware/fx2/include/fpga_regs_common.v
@@ -0,0 +1,117 @@
+//
+// This file is machine generated from ./fpga_regs_common.h
+// Do not edit by hand; your edits will be overwritten.
+//
+
+// This file defines registers common to all FPGA configurations.
+// Registers 0 to 31 are reserved for use in this file.
+
+
+// The FPGA needs to know the rate that samples are coming from and
+// going to the A/D's and D/A's.  div = 128e6 / sample_rate
+
+`define FR_TX_SAMPLE_RATE_DIV     7'd0
+`define FR_RX_SAMPLE_RATE_DIV     7'd1
+
+// 2 and 3 are defined in the ATR section
+
+`define FR_MASTER_CTRL            7'd4	// master enable and reset controls
+
+// i/o direction registers for pins that go to daughterboards.
+// Setting the bit makes it an output from the FPGA to the d'board.
+// top 16 is mask, low 16 is value
+
+`define FR_OE_0                   7'd5	// slot 0
+`define FR_OE_1                   7'd6
+`define FR_OE_2                   7'd7
+`define FR_OE_3                   7'd8
+
+// i/o registers for pins that go to daughterboards.
+// top 16 is a mask, low 16 is value
+
+`define FR_IO_0                   7'd9	// slot 0
+`define FR_IO_1                   7'd10
+`define FR_IO_2                   7'd11
+`define FR_IO_3                   7'd12
+
+`define FR_MODE                   7'd13
+
+
+// If the corresponding bit is set, internal FPGA debug circuitry
+// controls the i/o pins for the associated bank of daughterboard
+// i/o pins.  Typically used for debugging FPGA designs.
+
+`define FR_DEBUG_EN               7'd14
+
+
+// If the corresponding bit is set, enable the automatic DC
+// offset correction control loop.
+//
+// The 4 low bits are significant:
+//
+//   ADC0 = (1 << 0)
+//   ADC1 = (1 << 1)
+//   ADC2 = (1 << 2)
+//   ADC3 = (1 << 3)
+//
+// This control loop works if the attached daugherboard blocks DC.
+// Currently all daughterboards do block DC.  This includes:
+// basic rx, dbs_rx, tv_rx, flex_xxx_rx.
+
+`define FR_DC_OFFSET_CL_EN        7'd15			// DC Offset Control Loop Enable
+
+
+// offset corrections for ADC's and DAC's (2's complement)
+
+`define FR_ADC_OFFSET_0           7'd16
+`define FR_ADC_OFFSET_1           7'd17
+`define FR_ADC_OFFSET_2           7'd18
+`define FR_ADC_OFFSET_3           7'd19
+
+
+// ------------------------------------------------------------------------
+// Automatic Transmit/Receive switching
+//
+// If automatic transmit/receive (ATR) switching is enabled in the
+// FR_ATR_CTL register, the presence or absence of data in the FPGA
+// transmit fifo selects between two sets of values for each of the 4
+// banks of daughterboard i/o pins.
+//
+// Each daughterboard slot has 3 16-bit registers associated with it:
+//   FR_ATR_MASK_*, FR_ATR_TXVAL_* and FR_ATR_RXVAL_*
+//
+// FR_ATR_MASK_{0,1,2,3}: 
+//
+//   These registers determine which of the daugherboard i/o pins are
+//   affected by ATR switching.  If a bit in the mask is set, the
+//   corresponding i/o bit is controlled by ATR, else it's output
+//   value comes from the normal i/o pin output register:
+//   FR_IO_{0,1,2,3}.
+//
+// FR_ATR_TXVAL_{0,1,2,3}:
+// FR_ATR_RXVAL_{0,1,2,3}:
+//
+//   If the Tx fifo contains data, then the bits from TXVAL that are
+//   selected by MASK are output.  Otherwise, the bits from RXVAL that
+//   are selected by MASK are output.
+                      
+`define FR_ATR_MASK_0             7'd20	// slot 0
+`define FR_ATR_TXVAL_0            7'd21
+`define FR_ATR_RXVAL_0            7'd22
+
+`define FR_ATR_MASK_1             7'd23	// slot 1
+`define FR_ATR_TXVAL_1            7'd24
+`define FR_ATR_RXVAL_1            7'd25
+
+`define FR_ATR_MASK_2             7'd26	// slot 2
+`define FR_ATR_TXVAL_2            7'd27
+`define FR_ATR_RXVAL_2            7'd28
+
+`define FR_ATR_MASK_3             7'd29	// slot 3
+`define FR_ATR_TXVAL_3            7'd30
+`define FR_ATR_RXVAL_3            7'd31
+
+// Clock ticks to delay rising and falling edge of T/R signal
+`define FR_ATR_TX_DELAY           7'd2
+`define FR_ATR_RX_DELAY           7'd3
+
diff --git a/firmware/fx2/include/fpga_regs_standard.h b/firmware/fx2/include/fpga_regs_standard.h
new file mode 100644
index 000000000..7485e2bab
--- /dev/null
+++ b/firmware/fx2/include/fpga_regs_standard.h
@@ -0,0 +1,300 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2004,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.	If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDED_FPGA_REGS_STANDARD_H
+#define INCLUDED_FPGA_REGS_STANDARD_H
+
+// Register numbers 0 to 31 are reserved for use in fpga_regs_common.h.
+// Registers 64 to 79 are available for custom FPGA builds.
+
+
+// DDC / DUC
+
+#define	FR_INTERP_RATE		32	// [1,1024]
+#define	FR_DECIM_RATE		33	// [1,256]
+
+// DDC center freq
+
+#define FR_RX_FREQ_0		34
+#define FR_RX_FREQ_1		35
+#define FR_RX_FREQ_2		36
+#define FR_RX_FREQ_3		37
+
+// See below for DDC Starting Phase
+
+// ------------------------------------------------------------------------
+//  configure FPGA Rx mux
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------+-------+-------+-------+-------+-+-----+
+// |      must be zero     | Q3| I3| Q2| I2| Q1| I1| Q0| I0|Z| NCH |
+// +-----------------------+-------+-------+-------+-------+-+-----+
+//
+// There are a maximum of 4 digital downconverters in the the FPGA.
+// Each DDC has two 16-bit inputs, I and Q, and two 16-bit outputs, I & Q.
+//
+// DDC I inputs are specified by the two bit fields I3, I2, I1 & I0
+//
+//   0 = DDC input is from ADC 0
+//   1 = DDC input is from ADC 1
+//   2 = DDC input is from ADC 2
+//   3 = DDC input is from ADC 3
+//
+// If Z == 1, all DDC Q inputs are set to zero
+// If Z == 0, DDC Q inputs are specified by the two bit fields Q3, Q2, Q1 & Q0
+//
+// NCH specifies the number of complex channels that are sent across
+// the USB.  The legal values are 1, 2 or 4, corresponding to 2, 4 or
+// 8 16-bit values.
+
+#define	FR_RX_MUX		38
+
+// ------------------------------------------------------------------------
+//  configure FPGA Tx Mux.
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------+-------+-------+-------+-------+-+-----+
+// |                       | DAC3  | DAC2  | DAC1  |  DAC0 |0| NCH |
+// +-----------------------------------------------+-------+-+-----+
+//
+// NCH specifies the number of complex channels that are sent across
+// the USB.  The legal values are 1 or 2, corresponding to 2 or 4
+// 16-bit values.
+//
+// There are two interpolators with complex inputs and outputs.
+// There are four DACs.  (We use the DUC in each AD9862.)
+//
+// Each 4-bit DACx field specifies the source for the DAC and
+// whether or not that DAC is enabled.  Each subfield is coded
+// like this: 
+//
+//    3 2 1 0
+//   +-+-----+
+//   |E|  N  |
+//   +-+-----+
+//
+// Where E is set if the DAC is enabled, and N specifies which
+// interpolator output is connected to this DAC.
+//
+//  N   which interp output
+// ---  -------------------
+//  0   chan 0 I
+//  1   chan 0 Q
+//  2   chan 1 I
+//  3   chan 1 Q
+
+#define	FR_TX_MUX		39
+
+// ------------------------------------------------------------------------
+// REFCLK control
+//
+// Control whether a reference clock is sent to the daughterboards,
+// and what frequency.  The refclk is sent on d'board i/o pin 0.
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------------+-+------------+
+// |             Reserved (Must be zero)           |E|   DIVISOR  |
+// +-----------------------------------------------+-+------------+
+
+//
+// Bit 7  -- 1 turns on refclk, 0 allows IO use
+// Bits 6:0 Divider value
+
+#define FR_TX_A_REFCLK          40
+#define FR_RX_A_REFCLK          41
+#define FR_TX_B_REFCLK          42
+#define FR_RX_B_REFCLK          43
+
+#  define bmFR_REFCLK_EN	   0x80
+#  define bmFR_REFCLK_DIVISOR_MASK 0x7f
+
+// ------------------------------------------------------------------------
+// DDC Starting Phase
+
+#define FR_RX_PHASE_0		44
+#define FR_RX_PHASE_1		45
+#define FR_RX_PHASE_2		46
+#define FR_RX_PHASE_3		47
+
+// ------------------------------------------------------------------------
+// Tx data format control register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-------------------------------------------------------+-------+
+// |                    Reserved (Must be zero)            |  FMT  |
+// +-------------------------------------------------------+-------+
+//
+//  FMT values:
+
+#define FR_TX_FORMAT		48
+#  define bmFR_TX_FORMAT_16_IQ		0	// 16-bit I, 16-bit Q
+
+// ------------------------------------------------------------------------
+// Rx data format control register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------+-+-+---------+-------+
+// |          Reserved (Must be zero)        |B|Q|  WIDTH  | SHIFT |
+// +-----------------------------------------+-+-+---------+-------+
+//
+//  FMT values:
+
+#define FR_RX_FORMAT		49
+
+#  define bmFR_RX_FORMAT_SHIFT_MASK	(0x0f <<  0)	// arithmetic right shift [0, 15]
+#  define bmFR_RX_FORMAT_SHIFT_SHIFT	0
+#  define bmFR_RX_FORMAT_WIDTH_MASK	(0x1f <<  4)    // data width in bits [1, 16] (not all valid)
+#  define bmFR_RX_FORMAT_WIDTH_SHIFT    4
+#  define bmFR_RX_FORMAT_WANT_Q		(0x1  <<  9)    // deliver both I & Q, else just I
+#  define bmFR_RX_FORMAT_BYPASS_HB	(0x1  << 10)    // bypass half-band filter
+
+// The valid combinations currently are:
+//
+//   B  Q  WIDTH  SHIFT
+//   0  1    16     0
+//   0  1     8     8
+
+
+// Possible future values of WIDTH = {4, 2, 1}
+// 12 takes a bit more work, since we need to know packet alignment.
+
+// ------------------------------------------------------------------------
+// FIXME register numbers 50 to 63 are available
+
+// ------------------------------------------------------------------------
+// Registers 64 to 95 are reserved for user custom FPGA builds.
+// The standard USRP software will not touch these.
+
+#define FR_USER_0	64
+#define FR_USER_1	65
+#define FR_USER_2	66
+#define FR_USER_3	67
+#define FR_USER_4	68
+#define FR_USER_5	69
+#define FR_USER_6	70
+#define FR_USER_7	71
+#define FR_USER_8	72
+#define FR_USER_9	73
+#define FR_USER_10	74
+#define FR_USER_11	75
+#define FR_USER_12	76
+#define FR_USER_13	77
+#define FR_USER_14	78
+#define FR_USER_15	79
+#define FR_USER_16	80
+#define FR_USER_17	81
+#define FR_USER_18	82
+#define FR_USER_19	83
+#define FR_USER_20	84
+#define FR_USER_21	85
+#define FR_USER_22	86
+#define FR_USER_23	87
+#define FR_USER_24	88
+#define FR_USER_25	89
+#define FR_USER_26	90
+#define FR_USER_27	91
+#define FR_USER_28	92
+#define FR_USER_29	93
+#define FR_USER_30	94
+#define FR_USER_31	95
+
+//Registers needed for multi usrp master/slave configuration
+//
+//Rx Master/slave control register (FR_RX_MASTER_SLAVE = FR_USER_0)
+//
+#define FR_RX_MASTER_SLAVE		64
+#define bitnoFR_RX_SYNC			0
+#define bitnoFR_RX_SYNC_MASTER		1
+#define bitnoFR_RX_SYNC_SLAVE		2
+#  define bmFR_RX_SYNC          (1 <<bitnoFR_RX_SYNC) //1 If this is a master "sync now" and send sync to slave.
+                                                      //  If this is a slave "sync now" (testing purpose only)
+                                                      //  Sync is allmost the same as reset (clear all counters and buffers) 
+                                                      //  except that the io outputs and settings don't get reset (otherwise it couldn't send the sync to the slave)
+                                                      //0 Normal operation
+
+#  define bmFR_RX_SYNC_MASTER (1 <<bitnoFR_RX_SYNC_MASTER) //1 This is a rx sync master, output sync_rx on rx_a_io[15]
+                                                           //0 This is not a rx sync master
+#  define bmFR_RX_SYNC_SLAVE  (1 <<bitnoFR_RX_SYNC_SLAVE) //1 This is a rx sync slave, follow sync_rx on rx_a_io[bitnoFR_RX_SYNC_INPUT_IOPIN]
+                                                          //0 This is not an rx sync slave.
+
+//Caution The master settings will output values on the io lines.
+//They inheritely enable these lines as output. If you have a daughtercard which uses these lines also as output then you will burn your usrp and daughtercard.
+//If you set the slave bits then your usrp won't do anything if you don't connect a master.
+// Rx Master/slave control register
+//
+// The way this is supposed to be used is connecting a (short) 16pin flatcable from an rx daughterboard in RXA master io_rx[8..15] to slave io_rx[8..15] on RXA of slave usrp
+// This can be done with basic_rx boards or dbsrx boards
+//dbsrx: connect master-J25 to slave-J25
+//basic rx: connect J25 to slave-J25
+//CAUTION: pay attention to the lineup of your connector.
+//The red line (pin1) should be at the same side of the daughterboards on master and slave.
+//If you turnaround the cable on one end you will burn your usrp.
+
+//You cannot use a 16pin flatcable if you are using FLEX400 or FLEX2400 daughterboards, since these use a lot of the io pins.
+//You can still link them but you must use only a 2pin or 1pin cable
+//You can also use a 2-wire link. put a 2pin header on io[15],gnd of the master RXA daughterboard and connect it to io15,gnd of the slave RXA db.
+//You can use a cable like the ones found with the leds on the mainbord of a PC.
+//Make sure you don't twist the cable, otherwise you connect the sync output to ground.
+//To be save you could also just use a single wire from master io[15] to slave io[15], but this is not optimal for signal integrity.
+
+
+// Since rx_io[0] can normally be used as a refclk and is not exported on all daughterboards this line
+// still has the refclk function if you use the master/slave setup (it is not touched by the master/slave settings).
+// The master/slave circuitry will only use io pin 15 and does not touch any of the other io pins.
+#define bitnoFR_RX_SYNC_INPUT_IOPIN		15
+#define bmFR_RX_SYNC_INPUT_IOPIN		(1<<bitnoFR_RX_SYNC_INPUT_IOPIN)
+//TODO the output pin is still hardcoded in the verilog code, make it listen to the following define
+#define bitnoFR_RX_SYNC_OUTPUT_IOPIN	15
+#define bmFR_RX_SYNC_OUTPUT_IOPIN	(1<<bitnoFR_RX_SYNC_OUTPUT_IOPIN)
+// =======================================================================
+// READBACK Registers
+// =======================================================================
+
+#define FR_RB_IO_RX_A_IO_TX_A	1	// read back a-side i/o pins
+#define	FR_RB_IO_RX_B_IO_TX_B	2	// read back b-side i/o pins
+
+// ------------------------------------------------------------------------
+// FPGA Capability register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------------+-+-----+-+-----+
+// |                    Reserved (Must be zero)    |T|NDUC |R|NDDC |
+// +-----------------------------------------------+-+-----+-+-----+
+//
+// Bottom 4-bits are Rx capabilities
+// Next   4-bits are Tx capabilities
+
+#define	FR_RB_CAPS	3
+#  define bmFR_RB_CAPS_NDDC_MASK	(0x7 << 0)   // # of digital down converters 0,1,2,4
+#  define bmFR_RB_CAPS_NDDC_SHIFT	0
+#  define bmFR_RB_CAPS_RX_HAS_HALFBAND	(0x1 << 3)
+#  define bmFR_RB_CAPS_NDUC_MASK        (0x7 << 4)   // # of digital up converters 0,1,2
+#  define bmFR_RB_CAPS_NDUC_SHIFT	4
+#  define bmFR_RB_CAPS_TX_HAS_HALFBAND	(0x1 << 7)
+
+
+#endif /* INCLUDED_FPGA_REGS_STANDARD_H */
diff --git a/firmware/fx2/include/fpga_regs_standard.v b/firmware/fx2/include/fpga_regs_standard.v
new file mode 100644
index 000000000..d09aa6116
--- /dev/null
+++ b/firmware/fx2/include/fpga_regs_standard.v
@@ -0,0 +1,256 @@
+//
+// This file is machine generated from ./fpga_regs_standard.h
+// Do not edit by hand; your edits will be overwritten.
+//
+
+// Register numbers 0 to 31 are reserved for use in fpga_regs_common.h.
+// Registers 64 to 79 are available for custom FPGA builds.
+
+
+// DDC / DUC
+
+`define FR_INTERP_RATE            7'd32	// [1,1024]
+`define FR_DECIM_RATE             7'd33	// [1,256]
+
+// DDC center freq
+
+`define FR_RX_FREQ_0              7'd34
+`define FR_RX_FREQ_1              7'd35
+`define FR_RX_FREQ_2              7'd36
+`define FR_RX_FREQ_3              7'd37
+
+// See below for DDC Starting Phase
+
+// ------------------------------------------------------------------------
+//  configure FPGA Rx mux
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------+-------+-------+-------+-------+-+-----+
+// |      must be zero     | Q3| I3| Q2| I2| Q1| I1| Q0| I0|Z| NCH |
+// +-----------------------+-------+-------+-------+-------+-+-----+
+//
+// There are a maximum of 4 digital downconverters in the the FPGA.
+// Each DDC has two 16-bit inputs, I and Q, and two 16-bit outputs, I & Q.
+//
+// DDC I inputs are specified by the two bit fields I3, I2, I1 & I0
+//
+//   0 = DDC input is from ADC 0
+//   1 = DDC input is from ADC 1
+//   2 = DDC input is from ADC 2
+//   3 = DDC input is from ADC 3
+//
+// If Z == 1, all DDC Q inputs are set to zero
+// If Z == 0, DDC Q inputs are specified by the two bit fields Q3, Q2, Q1 & Q0
+//
+// NCH specifies the number of complex channels that are sent across
+// the USB.  The legal values are 1, 2 or 4, corresponding to 2, 4 or
+// 8 16-bit values.
+
+`define FR_RX_MUX                 7'd38
+
+// ------------------------------------------------------------------------
+//  configure FPGA Tx Mux.
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------+-------+-------+-------+-------+-+-----+
+// |                       | DAC3  | DAC2  | DAC1  |  DAC0 |0| NCH |
+// +-----------------------------------------------+-------+-+-----+
+//
+// NCH specifies the number of complex channels that are sent across
+// the USB.  The legal values are 1 or 2, corresponding to 2 or 4
+// 16-bit values.
+//
+// There are two interpolators with complex inputs and outputs.
+// There are four DACs.  (We use the DUC in each AD9862.)
+//
+// Each 4-bit DACx field specifies the source for the DAC and
+// whether or not that DAC is enabled.  Each subfield is coded
+// like this: 
+//
+//    3 2 1 0
+//   +-+-----+
+//   |E|  N  |
+//   +-+-----+
+//
+// Where E is set if the DAC is enabled, and N specifies which
+// interpolator output is connected to this DAC.
+//
+//  N   which interp output
+// ---  -------------------
+//  0   chan 0 I
+//  1   chan 0 Q
+//  2   chan 1 I
+//  3   chan 1 Q
+
+`define FR_TX_MUX                 7'd39
+
+// ------------------------------------------------------------------------
+// REFCLK control
+//
+// Control whether a reference clock is sent to the daughterboards,
+// and what frequency.  The refclk is sent on d'board i/o pin 0.
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------------+-+------------+
+// |             Reserved (Must be zero)           |E|   DIVISOR  |
+// +-----------------------------------------------+-+------------+
+
+//
+// Bit 7  -- 1 turns on refclk, 0 allows IO use
+// Bits 6:0 Divider value
+
+`define FR_TX_A_REFCLK            7'd40
+`define FR_RX_A_REFCLK            7'd41
+`define FR_TX_B_REFCLK            7'd42
+`define FR_RX_B_REFCLK            7'd43
+
+
+// ------------------------------------------------------------------------
+// DDC Starting Phase
+
+`define FR_RX_PHASE_0             7'd44
+`define FR_RX_PHASE_1             7'd45
+`define FR_RX_PHASE_2             7'd46
+`define FR_RX_PHASE_3             7'd47
+
+// ------------------------------------------------------------------------
+// Tx data format control register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-------------------------------------------------------+-------+
+// |                    Reserved (Must be zero)            |  FMT  |
+// +-------------------------------------------------------+-------+
+//
+//  FMT values:
+
+`define FR_TX_FORMAT              7'd48
+
+// ------------------------------------------------------------------------
+// Rx data format control register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------+-+-+---------+-------+
+// |          Reserved (Must be zero)        |B|Q|  WIDTH  | SHIFT |
+// +-----------------------------------------+-+-+---------+-------+
+//
+//  FMT values:
+
+`define FR_RX_FORMAT              7'd49
+
+
+// The valid combinations currently are:
+//
+//   B  Q  WIDTH  SHIFT
+//   0  1    16     0
+//   0  1     8     8
+
+
+// Possible future values of WIDTH = {4, 2, 1}
+// 12 takes a bit more work, since we need to know packet alignment.
+
+// ------------------------------------------------------------------------
+// FIXME register numbers 50 to 63 are available
+
+// ------------------------------------------------------------------------
+// Registers 64 to 95 are reserved for user custom FPGA builds.
+// The standard USRP software will not touch these.
+
+`define FR_USER_0                 7'd64
+`define FR_USER_1                 7'd65
+`define FR_USER_2                 7'd66
+`define FR_USER_3                 7'd67
+`define FR_USER_4                 7'd68
+`define FR_USER_5                 7'd69
+`define FR_USER_6                 7'd70
+`define FR_USER_7                 7'd71
+`define FR_USER_8                 7'd72
+`define FR_USER_9                 7'd73
+`define FR_USER_10                7'd74
+`define FR_USER_11                7'd75
+`define FR_USER_12                7'd76
+`define FR_USER_13                7'd77
+`define FR_USER_14                7'd78
+`define FR_USER_15                7'd79
+`define FR_USER_16                7'd80
+`define FR_USER_17                7'd81
+`define FR_USER_18                7'd82
+`define FR_USER_19                7'd83
+`define FR_USER_20                7'd84
+`define FR_USER_21                7'd85
+`define FR_USER_22                7'd86
+`define FR_USER_23                7'd87
+`define FR_USER_24                7'd88
+`define FR_USER_25                7'd89
+`define FR_USER_26                7'd90
+`define FR_USER_27                7'd91
+`define FR_USER_28                7'd92
+`define FR_USER_29                7'd93
+`define FR_USER_30                7'd94
+`define FR_USER_31                7'd95
+
+//Registers needed for multi usrp master/slave configuration
+//
+//Rx Master/slave control register (FR_RX_MASTER_SLAVE = FR_USER_0)
+//
+`define FR_RX_MASTER_SLAVE        7'd64
+`define bitnoFR_RX_SYNC           0
+`define bitnoFR_RX_SYNC_MASTER    1
+`define bitnoFR_RX_SYNC_SLAVE     2
+
+
+//Caution The master settings will output values on the io lines.
+//They inheritely enable these lines as output. If you have a daughtercard which uses these lines also as output then you will burn your usrp and daughtercard.
+//If you set the slave bits then your usrp won't do anything if you don't connect a master.
+// Rx Master/slave control register
+//
+// The way this is supposed to be used is connecting a (short) 16pin flatcable from an rx daughterboard in RXA master io_rx[8..15] to slave io_rx[8..15] on RXA of slave usrp
+// This can be done with basic_rx boards or dbsrx boards
+//dbsrx: connect master-J25 to slave-J25
+//basic rx: connect J25 to slave-J25
+//CAUTION: pay attention to the lineup of your connector.
+//The red line (pin1) should be at the same side of the daughterboards on master and slave.
+//If you turnaround the cable on one end you will burn your usrp.
+
+//You cannot use a 16pin flatcable if you are using FLEX400 or FLEX2400 daughterboards, since these use a lot of the io pins.
+//You can still link them but you must use only a 2pin or 1pin cable
+//You can also use a 2-wire link. put a 2pin header on io[15],gnd of the master RXA daughterboard and connect it to io15,gnd of the slave RXA db.
+//You can use a cable like the ones found with the leds on the mainbord of a PC.
+//Make sure you don't twist the cable, otherwise you connect the sync output to ground.
+//To be save you could also just use a single wire from master io[15] to slave io[15], but this is not optimal for signal integrity.
+
+
+// Since rx_io[0] can normally be used as a refclk and is not exported on all daughterboards this line
+// still has the refclk function if you use the master/slave setup (it is not touched by the master/slave settings).
+// The master/slave circuitry will only use io pin 15 and does not touch any of the other io pins.
+`define bitnoFR_RX_SYNC_INPUT_IOPIN 15
+`define bmFR_RX_SYNC_INPUT_IOPIN  (1<<bitnoFR_RX_SYNC_INPUT_IOPIN)
+//TODO the output pin is still hardcoded in the verilog code, make it listen to the following define
+`define bitnoFR_RX_SYNC_OUTPUT_IOPIN 15
+`define bmFR_RX_SYNC_OUTPUT_IOPIN (1<<bitnoFR_RX_SYNC_OUTPUT_IOPIN)
+// =======================================================================
+// READBACK Registers
+// =======================================================================
+
+`define FR_RB_IO_RX_A_IO_TX_A     7'd1	// read back a-side i/o pins
+`define FR_RB_IO_RX_B_IO_TX_B     7'd2	// read back b-side i/o pins
+
+// ------------------------------------------------------------------------
+// FPGA Capability register
+//
+//    3                   2                   1                       
+//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+// +-----------------------------------------------+-+-----+-+-----+
+// |                    Reserved (Must be zero)    |T|NDUC |R|NDDC |
+// +-----------------------------------------------+-+-----+-+-----+
+//
+// Bottom 4-bits are Rx capabilities
+// Next   4-bits are Tx capabilities
+
+`define FR_RB_CAPS                7'd3
+
+
diff --git a/firmware/fx2/include/fx2regs.h b/firmware/fx2/include/fx2regs.h
new file mode 100644
index 000000000..2f210f567
--- /dev/null
+++ b/firmware/fx2/include/fx2regs.h
@@ -0,0 +1,716 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/*
+//-----------------------------------------------------------------------------
+//   File:      FX2regs.h
+//   Contents:   EZ-USB FX2 register declarations and bit mask definitions.
+//
+// $Archive: /USB/Target/Inc/fx2regs.h $
+// $Date$
+// $Revision$
+//
+//
+//   Copyright (c) 2000 Cypress Semiconductor, All rights reserved
+//-----------------------------------------------------------------------------
+*/
+
+
+#ifndef FX2REGS_H   /* Header Sentry */
+#define FX2REGS_H
+
+#define ALLOCATE_EXTERN		// required for "right thing to happen" with fx2regs.h
+
+/*
+//-----------------------------------------------------------------------------
+// FX2 Related Register Assignments
+//-----------------------------------------------------------------------------
+
+// The Ez-USB FX2 registers are defined here. We use FX2regs.h for register 
+// address allocation by using "#define ALLOCATE_EXTERN". 
+// When using "#define ALLOCATE_EXTERN", you get (for instance): 
+// xdata volatile BYTE OUT7BUF[64]   _at_   0x7B40;
+// Such lines are created from FX2.h by using the preprocessor. 
+// Incidently, these lines will not generate any space in the resulting hex 
+// file; they just bind the symbols to the addresses for compilation. 
+// You just need to put "#define ALLOCATE_EXTERN" in your main program file; 
+// i.e. fw.c or a stand-alone C source file. 
+// Without "#define ALLOCATE_EXTERN", you just get the external reference: 
+// extern xdata volatile BYTE OUT7BUF[64]   ;//   0x7B40;
+// This uses the concatenation operator "##" to insert a comment "//" 
+// to cut off the end of the line, "_at_   0x7B40;", which is not wanted.
+*/
+
+
+#ifdef ALLOCATE_EXTERN
+#define EXTERN
+#define _AT_(a) at a
+#else
+#define EXTERN extern
+#define _AT_ ;/ ## /
+#endif
+
+typedef unsigned char BYTE;
+typedef unsigned short WORD;
+
+EXTERN xdata _AT_(0xE400) volatile BYTE GPIF_WAVE_DATA[128];
+EXTERN xdata _AT_(0xE480) volatile BYTE RES_WAVEDATA_END  ;
+
+// General Configuration
+
+EXTERN xdata _AT_(0xE600) volatile BYTE CPUCS             ;  // Control & Status
+EXTERN xdata _AT_(0xE601) volatile BYTE IFCONFIG          ;  // Interface Configuration
+EXTERN xdata _AT_(0xE602) volatile BYTE PINFLAGSAB        ;  // FIFO FLAGA and FLAGB Assignments
+EXTERN xdata _AT_(0xE603) volatile BYTE PINFLAGSCD        ;  // FIFO FLAGC and FLAGD Assignments
+EXTERN xdata _AT_(0xE604) volatile BYTE FIFORESET         ;  // Restore FIFOS to default state
+EXTERN xdata _AT_(0xE605) volatile BYTE BREAKPT           ;  // Breakpoint
+EXTERN xdata _AT_(0xE606) volatile BYTE BPADDRH           ;  // Breakpoint Address H
+EXTERN xdata _AT_(0xE607) volatile BYTE BPADDRL           ;  // Breakpoint Address L
+EXTERN xdata _AT_(0xE608) volatile BYTE UART230           ;  // 230 Kbaud clock for T0,T1,T2
+EXTERN xdata _AT_(0xE609) volatile BYTE FIFOPINPOLAR      ;  // FIFO polarities
+EXTERN xdata _AT_(0xE60A) volatile BYTE REVID             ;  // Chip Revision
+EXTERN xdata _AT_(0xE60B) volatile BYTE REVCTL            ;  // Chip Revision Control
+
+// Endpoint Configuration
+
+EXTERN xdata _AT_(0xE610) volatile BYTE EP1OUTCFG         ;  // Endpoint 1-OUT Configuration
+EXTERN xdata _AT_(0xE611) volatile BYTE EP1INCFG          ;  // Endpoint 1-IN Configuration
+EXTERN xdata _AT_(0xE612) volatile BYTE EP2CFG            ;  // Endpoint 2 Configuration
+EXTERN xdata _AT_(0xE613) volatile BYTE EP4CFG            ;  // Endpoint 4 Configuration
+EXTERN xdata _AT_(0xE614) volatile BYTE EP6CFG            ;  // Endpoint 6 Configuration
+EXTERN xdata _AT_(0xE615) volatile BYTE EP8CFG            ;  // Endpoint 8 Configuration
+EXTERN xdata _AT_(0xE618) volatile BYTE EP2FIFOCFG        ;  // Endpoint 2 FIFO configuration
+EXTERN xdata _AT_(0xE619) volatile BYTE EP4FIFOCFG        ;  // Endpoint 4 FIFO configuration
+EXTERN xdata _AT_(0xE61A) volatile BYTE EP6FIFOCFG        ;  // Endpoint 6 FIFO configuration
+EXTERN xdata _AT_(0xE61B) volatile BYTE EP8FIFOCFG        ;  // Endpoint 8 FIFO configuration
+EXTERN xdata _AT_(0xE620) volatile BYTE EP2AUTOINLENH     ;  // Endpoint 2 Packet Length H (IN only)
+EXTERN xdata _AT_(0xE621) volatile BYTE EP2AUTOINLENL     ;  // Endpoint 2 Packet Length L (IN only)
+EXTERN xdata _AT_(0xE622) volatile BYTE EP4AUTOINLENH     ;  // Endpoint 4 Packet Length H (IN only)
+EXTERN xdata _AT_(0xE623) volatile BYTE EP4AUTOINLENL     ;  // Endpoint 4 Packet Length L (IN only)
+EXTERN xdata _AT_(0xE624) volatile BYTE EP6AUTOINLENH     ;  // Endpoint 6 Packet Length H (IN only)
+EXTERN xdata _AT_(0xE625) volatile BYTE EP6AUTOINLENL     ;  // Endpoint 6 Packet Length L (IN only)
+EXTERN xdata _AT_(0xE626) volatile BYTE EP8AUTOINLENH     ;  // Endpoint 8 Packet Length H (IN only)
+EXTERN xdata _AT_(0xE627) volatile BYTE EP8AUTOINLENL     ;  // Endpoint 8 Packet Length L (IN only)
+EXTERN xdata _AT_(0xE630) volatile BYTE EP2FIFOPFH        ;  // EP2 Programmable Flag trigger H
+EXTERN xdata _AT_(0xE631) volatile BYTE EP2FIFOPFL        ;  // EP2 Programmable Flag trigger L
+EXTERN xdata _AT_(0xE632) volatile BYTE EP4FIFOPFH        ;  // EP4 Programmable Flag trigger H
+EXTERN xdata _AT_(0xE633) volatile BYTE EP4FIFOPFL        ;  // EP4 Programmable Flag trigger L
+EXTERN xdata _AT_(0xE634) volatile BYTE EP6FIFOPFH        ;  // EP6 Programmable Flag trigger H
+EXTERN xdata _AT_(0xE635) volatile BYTE EP6FIFOPFL        ;  // EP6 Programmable Flag trigger L
+EXTERN xdata _AT_(0xE636) volatile BYTE EP8FIFOPFH        ;  // EP8 Programmable Flag trigger H
+EXTERN xdata _AT_(0xE637) volatile BYTE EP8FIFOPFL        ;  // EP8 Programmable Flag trigger L
+EXTERN xdata _AT_(0xE640) volatile BYTE EP2ISOINPKTS      ;  // EP2 (if ISO) IN Packets per frame (1-3)
+EXTERN xdata _AT_(0xE641) volatile BYTE EP4ISOINPKTS      ;  // EP4 (if ISO) IN Packets per frame (1-3)
+EXTERN xdata _AT_(0xE642) volatile BYTE EP6ISOINPKTS      ;  // EP6 (if ISO) IN Packets per frame (1-3)
+EXTERN xdata _AT_(0xE643) volatile BYTE EP8ISOINPKTS      ;  // EP8 (if ISO) IN Packets per frame (1-3)
+EXTERN xdata _AT_(0xE648) volatile BYTE INPKTEND          ;  // Force IN Packet End
+EXTERN xdata _AT_(0xE649) volatile BYTE OUTPKTEND         ;  // Force OUT Packet End
+
+// Interrupts
+
+EXTERN xdata _AT_(0xE650) volatile BYTE EP2FIFOIE         ;  // Endpoint 2 Flag Interrupt Enable
+EXTERN xdata _AT_(0xE651) volatile BYTE EP2FIFOIRQ        ;  // Endpoint 2 Flag Interrupt Request
+EXTERN xdata _AT_(0xE652) volatile BYTE EP4FIFOIE         ;  // Endpoint 4 Flag Interrupt Enable
+EXTERN xdata _AT_(0xE653) volatile BYTE EP4FIFOIRQ        ;  // Endpoint 4 Flag Interrupt Request
+EXTERN xdata _AT_(0xE654) volatile BYTE EP6FIFOIE         ;  // Endpoint 6 Flag Interrupt Enable
+EXTERN xdata _AT_(0xE655) volatile BYTE EP6FIFOIRQ        ;  // Endpoint 6 Flag Interrupt Request
+EXTERN xdata _AT_(0xE656) volatile BYTE EP8FIFOIE         ;  // Endpoint 8 Flag Interrupt Enable
+EXTERN xdata _AT_(0xE657) volatile BYTE EP8FIFOIRQ        ;  // Endpoint 8 Flag Interrupt Request
+EXTERN xdata _AT_(0xE658) volatile BYTE IBNIE             ;  // IN-BULK-NAK Interrupt Enable
+EXTERN xdata _AT_(0xE659) volatile BYTE IBNIRQ            ;  // IN-BULK-NAK interrupt Request
+EXTERN xdata _AT_(0xE65A) volatile BYTE NAKIE             ;  // Endpoint Ping NAK interrupt Enable
+EXTERN xdata _AT_(0xE65B) volatile BYTE NAKIRQ            ;  // Endpoint Ping NAK interrupt Request
+EXTERN xdata _AT_(0xE65C) volatile BYTE USBIE             ;  // USB Int Enables
+EXTERN xdata _AT_(0xE65D) volatile BYTE USBIRQ            ;  // USB Interrupt Requests
+EXTERN xdata _AT_(0xE65E) volatile BYTE EPIE              ;  // Endpoint Interrupt Enables
+EXTERN xdata _AT_(0xE65F) volatile BYTE EPIRQ             ;  // Endpoint Interrupt Requests
+EXTERN xdata _AT_(0xE660) volatile BYTE GPIFIE            ;  // GPIF Interrupt Enable
+EXTERN xdata _AT_(0xE661) volatile BYTE GPIFIRQ           ;  // GPIF Interrupt Request
+EXTERN xdata _AT_(0xE662) volatile BYTE USBERRIE          ;  // USB Error Interrupt Enables
+EXTERN xdata _AT_(0xE663) volatile BYTE USBERRIRQ         ;  // USB Error Interrupt Requests
+EXTERN xdata _AT_(0xE664) volatile BYTE ERRCNTLIM         ;  // USB Error counter and limit
+EXTERN xdata _AT_(0xE665) volatile BYTE CLRERRCNT         ;  // Clear Error Counter EC[3..0]
+EXTERN xdata _AT_(0xE666) volatile BYTE INT2IVEC          ;  // Interupt 2 (USB) Autovector
+EXTERN xdata _AT_(0xE667) volatile BYTE INT4IVEC          ;  // Interupt 4 (FIFOS & GPIF) Autovector
+EXTERN xdata _AT_(0xE668) volatile BYTE INTSETUP          ;  // Interrupt 2&4 Setup
+
+// Input/Output
+
+EXTERN xdata _AT_(0xE670) volatile BYTE PORTACFG          ;  // I/O PORTA Alternate Configuration
+EXTERN xdata _AT_(0xE671) volatile BYTE PORTCCFG          ;  // I/O PORTC Alternate Configuration
+EXTERN xdata _AT_(0xE672) volatile BYTE PORTECFG          ;  // I/O PORTE Alternate Configuration
+EXTERN xdata _AT_(0xE678) volatile BYTE I2CS              ;  // Control & Status
+EXTERN xdata _AT_(0xE679) volatile BYTE I2DAT             ;  // Data
+EXTERN xdata _AT_(0xE67A) volatile BYTE I2CTL             ;  // I2C Control
+EXTERN xdata _AT_(0xE67B) volatile BYTE XAUTODAT1         ;  // Autoptr1 MOVX access
+EXTERN xdata _AT_(0xE67C) volatile BYTE XAUTODAT2         ;  // Autoptr2 MOVX access
+
+#define EXTAUTODAT1 XAUTODAT1
+#define EXTAUTODAT2 XAUTODAT2
+
+// USB Control
+
+EXTERN xdata _AT_(0xE680) volatile BYTE USBCS             ;  // USB Control & Status
+EXTERN xdata _AT_(0xE681) volatile BYTE SUSPEND           ;  // Put chip into suspend
+EXTERN xdata _AT_(0xE682) volatile BYTE WAKEUPCS          ;  // Wakeup source and polarity
+EXTERN xdata _AT_(0xE683) volatile BYTE TOGCTL            ;  // Toggle Control
+EXTERN xdata _AT_(0xE684) volatile BYTE USBFRAMEH         ;  // USB Frame count H
+EXTERN xdata _AT_(0xE685) volatile BYTE USBFRAMEL         ;  // USB Frame count L
+EXTERN xdata _AT_(0xE686) volatile BYTE MICROFRAME        ;  // Microframe count, 0-7
+EXTERN xdata _AT_(0xE687) volatile BYTE FNADDR            ;  // USB Function address
+
+// Endpoints
+
+EXTERN xdata _AT_(0xE68A) volatile BYTE EP0BCH            ;  // Endpoint 0 Byte Count H
+EXTERN xdata _AT_(0xE68B) volatile BYTE EP0BCL            ;  // Endpoint 0 Byte Count L
+EXTERN xdata _AT_(0xE68D) volatile BYTE EP1OUTBC          ;  // Endpoint 1 OUT Byte Count
+EXTERN xdata _AT_(0xE68F) volatile BYTE EP1INBC           ;  // Endpoint 1 IN Byte Count
+EXTERN xdata _AT_(0xE690) volatile BYTE EP2BCH            ;  // Endpoint 2 Byte Count H
+EXTERN xdata _AT_(0xE691) volatile BYTE EP2BCL            ;  // Endpoint 2 Byte Count L
+EXTERN xdata _AT_(0xE694) volatile BYTE EP4BCH            ;  // Endpoint 4 Byte Count H
+EXTERN xdata _AT_(0xE695) volatile BYTE EP4BCL            ;  // Endpoint 4 Byte Count L
+EXTERN xdata _AT_(0xE698) volatile BYTE EP6BCH            ;  // Endpoint 6 Byte Count H
+EXTERN xdata _AT_(0xE699) volatile BYTE EP6BCL            ;  // Endpoint 6 Byte Count L
+EXTERN xdata _AT_(0xE69C) volatile BYTE EP8BCH            ;  // Endpoint 8 Byte Count H
+EXTERN xdata _AT_(0xE69D) volatile BYTE EP8BCL            ;  // Endpoint 8 Byte Count L
+EXTERN xdata _AT_(0xE6A0) volatile BYTE EP0CS             ;  // Endpoint  Control and Status
+EXTERN xdata _AT_(0xE6A1) volatile BYTE EP1OUTCS          ;  // Endpoint 1 OUT Control and Status
+EXTERN xdata _AT_(0xE6A2) volatile BYTE EP1INCS           ;  // Endpoint 1 IN Control and Status
+EXTERN xdata _AT_(0xE6A3) volatile BYTE EP2CS             ;  // Endpoint 2 Control and Status
+EXTERN xdata _AT_(0xE6A4) volatile BYTE EP4CS             ;  // Endpoint 4 Control and Status
+EXTERN xdata _AT_(0xE6A5) volatile BYTE EP6CS             ;  // Endpoint 6 Control and Status
+EXTERN xdata _AT_(0xE6A6) volatile BYTE EP8CS             ;  // Endpoint 8 Control and Status
+EXTERN xdata _AT_(0xE6A7) volatile BYTE EP2FIFOFLGS       ;  // Endpoint 2 Flags
+EXTERN xdata _AT_(0xE6A8) volatile BYTE EP4FIFOFLGS       ;  // Endpoint 4 Flags
+EXTERN xdata _AT_(0xE6A9) volatile BYTE EP6FIFOFLGS       ;  // Endpoint 6 Flags
+EXTERN xdata _AT_(0xE6AA) volatile BYTE EP8FIFOFLGS       ;  // Endpoint 8 Flags
+EXTERN xdata _AT_(0xE6AB) volatile BYTE EP2FIFOBCH        ;  // EP2 FIFO total byte count H
+EXTERN xdata _AT_(0xE6AC) volatile BYTE EP2FIFOBCL        ;  // EP2 FIFO total byte count L
+EXTERN xdata _AT_(0xE6AD) volatile BYTE EP4FIFOBCH        ;  // EP4 FIFO total byte count H
+EXTERN xdata _AT_(0xE6AE) volatile BYTE EP4FIFOBCL        ;  // EP4 FIFO total byte count L
+EXTERN xdata _AT_(0xE6AF) volatile BYTE EP6FIFOBCH        ;  // EP6 FIFO total byte count H
+EXTERN xdata _AT_(0xE6B0) volatile BYTE EP6FIFOBCL        ;  // EP6 FIFO total byte count L
+EXTERN xdata _AT_(0xE6B1) volatile BYTE EP8FIFOBCH        ;  // EP8 FIFO total byte count H
+EXTERN xdata _AT_(0xE6B2) volatile BYTE EP8FIFOBCL        ;  // EP8 FIFO total byte count L
+EXTERN xdata _AT_(0xE6B3) volatile BYTE SUDPTRH           ;  // Setup Data Pointer high address byte
+EXTERN xdata _AT_(0xE6B4) volatile BYTE SUDPTRL           ;  // Setup Data Pointer low address byte
+EXTERN xdata _AT_(0xE6B5) volatile BYTE SUDPTRCTL         ;  // Setup Data Pointer Auto Mode
+EXTERN xdata _AT_(0xE6B8) volatile BYTE SETUPDAT[8]       ;  // 8 bytes of SETUP data
+
+// GPIF
+
+EXTERN xdata _AT_(0xE6C0) volatile BYTE GPIFWFSELECT      ;  // Waveform Selector
+EXTERN xdata _AT_(0xE6C1) volatile BYTE GPIFIDLECS        ;  // GPIF Done, GPIF IDLE drive mode
+EXTERN xdata _AT_(0xE6C2) volatile BYTE GPIFIDLECTL       ;  // Inactive Bus, CTL states
+EXTERN xdata _AT_(0xE6C3) volatile BYTE GPIFCTLCFG        ;  // CTL OUT pin drive
+EXTERN xdata _AT_(0xE6C4) volatile BYTE GPIFADRH          ;  // GPIF Address H
+EXTERN xdata _AT_(0xE6C5) volatile BYTE GPIFADRL          ;  // GPIF Address L
+
+EXTERN xdata _AT_(0xE6CE) volatile BYTE GPIFTCB3          ;  // GPIF Transaction Count Byte 3
+EXTERN xdata _AT_(0xE6CF) volatile BYTE GPIFTCB2          ;  // GPIF Transaction Count Byte 2
+EXTERN xdata _AT_(0xE6D0) volatile BYTE GPIFTCB1          ;  // GPIF Transaction Count Byte 1
+EXTERN xdata _AT_(0xE6D1) volatile BYTE GPIFTCB0          ;  // GPIF Transaction Count Byte 0
+
+#define EP2GPIFTCH GPIFTCB1   // these are here for backwards compatibility
+#define EP2GPIFTCL GPIFTCB0   // before REVE silicon (ie. REVB and REVD)
+#define EP4GPIFTCH GPIFTCB1   // these are here for backwards compatibility
+#define EP4GPIFTCL GPIFTCB0   // before REVE silicon (ie. REVB and REVD)
+#define EP6GPIFTCH GPIFTCB1   // these are here for backwards compatibility
+#define EP6GPIFTCL GPIFTCB0   // before REVE silicon (ie. REVB and REVD)
+#define EP8GPIFTCH GPIFTCB1   // these are here for backwards compatibility
+#define EP8GPIFTCL GPIFTCB0   // before REVE silicon (ie. REVB and REVD)
+
+// EXTERN xdata volatile BYTE EP2GPIFTCH     _AT_ 0xE6D0;  // EP2 GPIF Transaction Count High
+// EXTERN xdata volatile BYTE EP2GPIFTCL     _AT_ 0xE6D1;  // EP2 GPIF Transaction Count Low
+EXTERN xdata _AT_(0xE6D2) volatile BYTE EP2GPIFFLGSEL     ;  // EP2 GPIF Flag select
+EXTERN xdata _AT_(0xE6D3) volatile BYTE EP2GPIFPFSTOP     ;  // Stop GPIF EP2 transaction on prog. flag
+EXTERN xdata _AT_(0xE6D4) volatile BYTE EP2GPIFTRIG       ;  // EP2 FIFO Trigger
+// EXTERN xdata volatile BYTE EP4GPIFTCH     _AT_ 0xE6D8;  // EP4 GPIF Transaction Count High
+// EXTERN xdata volatile BYTE EP4GPIFTCL     _AT_ 0xE6D9;  // EP4 GPIF Transactionr Count Low
+EXTERN xdata _AT_(0xE6DA) volatile BYTE EP4GPIFFLGSEL     ;  // EP4 GPIF Flag select
+EXTERN xdata _AT_(0xE6DB) volatile BYTE EP4GPIFPFSTOP     ;  // Stop GPIF EP4 transaction on prog. flag
+EXTERN xdata _AT_(0xE6DC) volatile BYTE EP4GPIFTRIG       ;  // EP4 FIFO Trigger
+// EXTERN xdata volatile BYTE EP6GPIFTCH     _AT_ 0xE6E0;  // EP6 GPIF Transaction Count High
+// EXTERN xdata volatile BYTE EP6GPIFTCL     _AT_ 0xE6E1;  // EP6 GPIF Transaction Count Low
+EXTERN xdata _AT_(0xE6E2) volatile BYTE EP6GPIFFLGSEL     ;  // EP6 GPIF Flag select
+EXTERN xdata _AT_(0xE6E3) volatile BYTE EP6GPIFPFSTOP     ;  // Stop GPIF EP6 transaction on prog. flag
+EXTERN xdata _AT_(0xE6E4) volatile BYTE EP6GPIFTRIG       ;  // EP6 FIFO Trigger
+// EXTERN xdata volatile BYTE EP8GPIFTCH     _AT_ 0xE6E8;  // EP8 GPIF Transaction Count High
+// EXTERN xdata volatile BYTE EP8GPIFTCL     _AT_ 0xE6E9;  // EP8GPIF Transaction Count Low
+EXTERN xdata _AT_(0xE6EA) volatile BYTE EP8GPIFFLGSEL     ;  // EP8 GPIF Flag select
+EXTERN xdata _AT_(0xE6EB) volatile BYTE EP8GPIFPFSTOP     ;  // Stop GPIF EP8 transaction on prog. flag
+EXTERN xdata _AT_(0xE6EC) volatile BYTE EP8GPIFTRIG       ;  // EP8 FIFO Trigger
+EXTERN xdata _AT_(0xE6F0) volatile BYTE XGPIFSGLDATH      ;  // GPIF Data H (16-bit mode only)
+EXTERN xdata _AT_(0xE6F1) volatile BYTE XGPIFSGLDATLX     ;  // Read/Write GPIF Data L & trigger transac
+EXTERN xdata _AT_(0xE6F2) volatile BYTE XGPIFSGLDATLNOX   ;  // Read GPIF Data L, no transac trigger
+EXTERN xdata _AT_(0xE6F3) volatile BYTE GPIFREADYCFG      ;  // Internal RDY,Sync/Async, RDY5CFG
+EXTERN xdata _AT_(0xE6F4) volatile BYTE GPIFREADYSTAT     ;  // RDY pin states
+EXTERN xdata _AT_(0xE6F5) volatile BYTE GPIFABORT         ;  // Abort GPIF cycles
+
+// UDMA
+
+EXTERN xdata _AT_(0xE6C6) volatile BYTE FLOWSTATE         ; //Defines GPIF flow state
+EXTERN xdata _AT_(0xE6C7) volatile BYTE FLOWLOGIC         ; //Defines flow/hold decision criteria
+EXTERN xdata _AT_(0xE6C8) volatile BYTE FLOWEQ0CTL        ; //CTL states during active flow state
+EXTERN xdata _AT_(0xE6C9) volatile BYTE FLOWEQ1CTL        ; //CTL states during hold flow state
+EXTERN xdata _AT_(0xE6CA) volatile BYTE FLOWHOLDOFF       ;
+EXTERN xdata _AT_(0xE6CB) volatile BYTE FLOWSTB           ; //CTL/RDY Signal to use as master data strobe 
+EXTERN xdata _AT_(0xE6CC) volatile BYTE FLOWSTBEDGE       ; //Defines active master strobe edge
+EXTERN xdata _AT_(0xE6CD) volatile BYTE FLOWSTBHPERIOD    ; //Half Period of output master strobe
+EXTERN xdata _AT_(0xE60C) volatile BYTE GPIFHOLDAMOUNT    ; //Data delay shift 
+EXTERN xdata _AT_(0xE67D) volatile BYTE UDMACRCH          ; //CRC Upper byte
+EXTERN xdata _AT_(0xE67E) volatile BYTE UDMACRCL          ; //CRC Lower byte
+EXTERN xdata _AT_(0xE67F) volatile BYTE UDMACRCQUAL       ; //UDMA In only, host terminated use only
+
+
+// Debug/Test
+
+EXTERN xdata _AT_(0xE6F8) volatile BYTE DBUG              ;  // Debug
+EXTERN xdata _AT_(0xE6F9) volatile BYTE TESTCFG           ;  // Test configuration
+EXTERN xdata _AT_(0xE6FA) volatile BYTE USBTEST           ;  // USB Test Modes
+EXTERN xdata _AT_(0xE6FB) volatile BYTE CT1               ;  // Chirp Test--Override
+EXTERN xdata _AT_(0xE6FC) volatile BYTE CT2               ;  // Chirp Test--FSM
+EXTERN xdata _AT_(0xE6FD) volatile BYTE CT3               ;  // Chirp Test--Control Signals
+EXTERN xdata _AT_(0xE6FE) volatile BYTE CT4               ;  // Chirp Test--Inputs
+
+// Endpoint Buffers
+
+EXTERN xdata _AT_(0xE740) volatile BYTE EP0BUF[64]        ;  // EP0 IN-OUT buffer
+EXTERN xdata _AT_(0xE780) volatile BYTE EP1OUTBUF[64]     ;  // EP1-OUT buffer
+EXTERN xdata _AT_(0xE7C0) volatile BYTE EP1INBUF[64]      ;  // EP1-IN buffer
+EXTERN xdata _AT_(0xF000) volatile BYTE EP2FIFOBUF[1024]  ;  // 512/1024-byte EP2 buffer (IN or OUT)
+EXTERN xdata _AT_(0xF400) volatile BYTE EP4FIFOBUF[1024]  ;  // 512 byte EP4 buffer (IN or OUT)
+EXTERN xdata _AT_(0xF800) volatile BYTE EP6FIFOBUF[1024]  ;  // 512/1024-byte EP6 buffer (IN or OUT)
+EXTERN xdata _AT_(0xFC00) volatile BYTE EP8FIFOBUF[1024]  ;  // 512 byte EP8 buffer (IN or OUT)
+
+#undef EXTERN
+#undef _AT_
+
+/*-----------------------------------------------------------------------------
+   Special Function Registers (SFRs)
+   The byte registers and bits defined in the following list are based
+   on the Synopsis definition of the 8051 Special Function Registers for EZ-USB. 
+    If you modify the register definitions below, please regenerate the file 
+    "ezregs.inc" which includes the same basic information for assembly inclusion.
+-----------------------------------------------------------------------------*/
+
+sfr at 0x80 IOA;
+sfr at 0x81 SP;
+sfr at 0x82 DPL;
+sfr at 0x83 DPH;
+sfr at 0x84 DPL1;
+sfr at 0x85 DPH1;
+sfr at 0x86 DPS;
+         /*  DPS  */
+         sbit at 0x86+0 SEL;
+sfr at 0x87 PCON;   /*  PCON  */
+         //sbit IDLE   = 0x87+0;
+         //sbit STOP   = 0x87+1;
+         //sbit GF0    = 0x87+2;
+         //sbit GF1    = 0x87+3;
+         //sbit SMOD0  = 0x87+7;
+sfr at 0x88 TCON;
+         /*  TCON  */
+         sbit at 0x88+0 IT0;
+         sbit at 0x88+1 IE0;
+         sbit at 0x88+2 IT1;
+         sbit at 0x88+3 IE1;
+         sbit at 0x88+4 TR0;
+         sbit at 0x88+5 TF0;
+         sbit at 0x88+6 TR1;
+         sbit at 0x88+7 TF1;
+sfr at 0x89 TMOD;
+         /*  TMOD  */
+         //sbit M00    = 0x89+0;
+         //sbit M10    = 0x89+1;
+         //sbit CT0    = 0x89+2;
+         //sbit GATE0  = 0x89+3;
+         //sbit M01    = 0x89+4;
+         //sbit M11    = 0x89+5;
+         //sbit CT1    = 0x89+6;
+         //sbit GATE1  = 0x89+7;
+sfr at 0x8A TL0;
+sfr at 0x8B TL1;
+sfr at 0x8C TH0;
+sfr at 0x8D TH1;
+sfr at 0x8E CKCON;
+         /*  CKCON  */
+         //sbit MD0    = 0x89+0;
+         //sbit MD1    = 0x89+1;
+         //sbit MD2    = 0x89+2;
+         //sbit T0M    = 0x89+3;
+         //sbit T1M    = 0x89+4;
+         //sbit T2M    = 0x89+5;
+// sfr at 0x8F SPC_FNC; // Was WRS in Reg320
+         /*  CKCON  */
+         //sbit WRS    = 0x8F+0;
+sfr at 0x90 IOB;
+sfr at 0x91 EXIF; // EXIF Bit Values differ from Reg320
+         /*  EXIF  */
+         //sbit USBINT = 0x91+4;
+         //sbit I2CINT = 0x91+5;
+         //sbit IE4    = 0x91+6;
+         //sbit IE5    = 0x91+7;
+sfr at 0x92 MPAGE;
+sfr at 0x98 SCON0;
+         /*  SCON0  */
+         sbit at 0x98+0 RI;
+         sbit at 0x98+1 TI;
+         sbit at 0x98+2 RB8;
+         sbit at 0x98+3 TB8;
+         sbit at 0x98+4 REN;
+         sbit at 0x98+5 SM2;
+         sbit at 0x98+6 SM1;
+         sbit at 0x98+7 SM0;
+sfr at 0x99 SBUF0;
+
+sfr at 0x9A APTR1H;
+sfr at 0x9B APTR1L;
+sfr at 0x9C AUTODAT1; 
+sfr at 0x9D AUTOPTRH2;
+sfr at 0x9E AUTOPTRL2; 
+sfr at 0x9F AUTODAT2;
+sfr at 0xA0 IOC;
+sfr at 0xA1 INT2CLR;
+sfr at 0xA2 INT4CLR;
+
+#define	AUTOPTRH1	APTR1H
+#define	AUTOPTRL1	APTR1L
+
+sfr at 0xA8 IE;
+         /*  IE  */
+         sbit at 0xA8+0 EX0;
+         sbit at 0xA8+1 ET0;
+         sbit at 0xA8+2 EX1;
+         sbit at 0xA8+3 ET1;
+         sbit at 0xA8+4 ES0;
+         sbit at 0xA8+5 ET2;
+         sbit at 0xA8+6 ES1;
+         sbit at 0xA8+7 EA;
+
+sfr at 0xAA EP2468STAT;
+         /* EP2468STAT */
+         //sbit EP2E   = 0xAA+0;
+         //sbit EP2F   = 0xAA+1;
+         //sbit EP4E   = 0xAA+2;
+         //sbit EP4F   = 0xAA+3;
+         //sbit EP6E   = 0xAA+4;
+         //sbit EP6F   = 0xAA+5;
+         //sbit EP8E   = 0xAA+6;
+         //sbit EP8F   = 0xAA+7;
+
+sfr at 0xAB EP24FIFOFLGS;
+sfr at 0xAC EP68FIFOFLGS;
+sfr at 0xAF AUTOPTRSETUP;
+            /* AUTOPTRSETUP */
+            // sbit EXTACC  = 0xAF+0;
+            // sbit APTR1FZ = 0xAF+1;
+            // sbit APTR2FZ = 0xAF+2;
+
+sfr at 0xB0 IOD;
+sfr at 0xB1 IOE;
+sfr at 0xB2 OEA;
+sfr at 0xB3 OEB;
+sfr at 0xB4 OEC;
+sfr at 0xB5 OED;
+sfr at 0xB6 OEE;
+
+sfr at 0xB8 IP;
+         /*  IP  */
+         sbit at 0xB8+0 PX0;
+         sbit at 0xB8+1 PT0;
+         sbit at 0xB8+2 PX1;
+         sbit at 0xB8+3 PT1;
+         sbit at 0xB8+4 PS0;
+         sbit at 0xB8+5 PT2;
+         sbit at 0xB8+6 PS1;
+
+sfr at 0xBA EP01STAT;
+sfr at 0xBB GPIFTRIG;
+                
+sfr at 0xBD GPIFSGLDATH;
+sfr at 0xBE GPIFSGLDATLX;
+sfr at 0xBF GPIFSGLDATLNOX;
+
+sfr at 0xC0 SCON1;
+         /*  SCON1  */
+         sbit at 0xC0+0 RI1;
+         sbit at 0xC0+1 TI1;
+         sbit at 0xC0+2 RB81;
+         sbit at 0xC0+3 TB81;
+         sbit at 0xC0+4 REN1;
+         sbit at 0xC0+5 SM21;
+         sbit at 0xC0+6 SM11;
+         sbit at 0xC0+7 SM01;
+sfr at 0xC1 SBUF1;
+sfr at 0xC8 T2CON;
+         /*  T2CON  */
+	 sbit at 0xC8+0 CP_RL2;
+	 sbit at 0xC8+1 C_T2;
+         sbit at 0xC8+2 TR2;
+         sbit at 0xC8+3 EXEN2;
+         sbit at 0xC8+4 TCLK;
+         sbit at 0xC8+5 RCLK;
+         sbit at 0xC8+6 EXF2;
+         sbit at 0xC8+7 TF2;
+sfr at 0xCA RCAP2L;
+sfr at 0xCB RCAP2H;
+sfr at 0xCC TL2;
+sfr at 0xCD TH2;
+sfr at 0xD0 PSW;
+         /*  PSW  */
+         sbit at 0xD0+0 P;
+         sbit at 0xD0+1 FL;
+         sbit at 0xD0+2 OV;
+         sbit at 0xD0+3 RS0;
+         sbit at 0xD0+4 RS1;
+         sbit at 0xD0+5 F0;
+         sbit at 0xD0+6 AC;
+         sbit at 0xD0+7 CY;
+sfr at 0xD8 EICON; // Was WDCON in DS80C320 EICON; Bit Values differ from Reg320
+         /*  EICON  */
+         sbit at 0xD8+3 INT6;
+         sbit at 0xD8+4 RESI;
+         sbit at 0xD8+5 ERESI;
+         sbit at 0xD8+7 SMOD1;
+sfr at 0xE0 ACC;
+sfr at 0xE8 EIE; // EIE Bit Values differ from Reg320
+                        /*  EIE  */
+         sbit at 0xE8+0 EIUSB;
+         sbit at 0xE8+1 EI2C;
+         sbit at 0xE8+2 EIEX4;
+         sbit at 0xE8+3 EIEX5;
+         sbit at 0xE8+4 EIEX6;
+sfr at 0xF0 B;
+sfr at 0xF8 EIP; // EIP Bit Values differ from Reg320
+                        /*  EIP  */
+         sbit at 0xF8+0 PUSB;
+         sbit at 0xF8+1 PI2C;
+         sbit at 0xF8+2 EIPX4;
+         sbit at 0xF8+3 EIPX5;
+         sbit at 0xF8+4 EIPX6;
+
+/*-----------------------------------------------------------------------------
+   Bit Masks
+-----------------------------------------------------------------------------*/
+
+#define bmBIT0	1
+#define bmBIT1	2
+#define bmBIT2	4
+#define bmBIT3	8
+#define bmBIT4	16
+#define bmBIT5	32
+#define bmBIT6	64
+#define bmBIT7	128
+
+/* CPU Control & Status Register (CPUCS) */
+#define bmPRTCSTB    bmBIT5
+#define bmCLKSPD     (bmBIT4 | bmBIT3)
+#define bmCLKSPD1    bmBIT4
+#define bmCLKSPD0    bmBIT3
+#define bmCLKINV     bmBIT2
+#define bmCLKOE      bmBIT1
+#define bm8051RES    bmBIT0
+/* Port Alternate Configuration Registers */
+/* Port A (PORTACFG) */
+#define bmFLAGD      bmBIT7
+#define bmINT1       bmBIT1
+#define bmINT0       bmBIT0
+/* Port C (PORTCCFG) */
+#define bmGPIFA7     bmBIT7
+#define bmGPIFA6     bmBIT6
+#define bmGPIFA5     bmBIT5
+#define bmGPIFA4     bmBIT4
+#define bmGPIFA3     bmBIT3
+#define bmGPIFA2     bmBIT2
+#define bmGPIFA1     bmBIT1
+#define bmGPIFA0     bmBIT0
+/* Port E (PORTECFG) */
+#define bmGPIFA8     bmBIT7
+#define bmT2EX       bmBIT6
+#define bmINT6       bmBIT5
+#define bmRXD1OUT    bmBIT4
+#define bmRXD0OUT    bmBIT3
+#define bmT2OUT      bmBIT2
+#define bmT1OUT      bmBIT1
+#define bmT0OUT      bmBIT0
+
+/* I2C Control & Status Register (I2CS) */
+#define bmSTART      bmBIT7
+#define bmSTOP       bmBIT6
+#define bmLASTRD     bmBIT5
+#define bmID         (bmBIT4 | bmBIT3)
+#define bmBERR       bmBIT2
+#define bmACK        bmBIT1
+#define bmDONE       bmBIT0
+/* I2C Control Register (I2CTL) */
+#define bmSTOPIE     bmBIT1
+#define bm400KHZ     bmBIT0
+/* Interrupt 2 (USB) Autovector Register (INT2IVEC) */
+#define bmIV4        bmBIT6
+#define bmIV3        bmBIT5
+#define bmIV2        bmBIT4
+#define bmIV1        bmBIT3
+#define bmIV0        bmBIT2
+/* USB Interrupt Request & Enable Registers (USBIE/USBIRQ) */
+#define bmEP0ACK     bmBIT6
+#define bmHSGRANT    bmBIT5
+#define bmURES       bmBIT4
+#define bmSUSP       bmBIT3
+#define bmSUTOK      bmBIT2
+#define bmSOF        bmBIT1
+#define bmSUDAV      bmBIT0
+/* Breakpoint register (BREAKPT) */
+#define bmBREAK      bmBIT3
+#define bmBPPULSE    bmBIT2
+#define bmBPEN       bmBIT1
+/* Interrupt 2 & 4 Setup (INTSETUP) */
+#define bmAV2EN      bmBIT3
+#define bmINT4IN     bmBIT1
+#define bmAV4EN      bmBIT0
+/* USB Control & Status Register (USBCS) */
+#define bmHSM        bmBIT7
+#define bmDISCON     bmBIT3
+#define bmNOSYNSOF   bmBIT2
+#define bmRENUM      bmBIT1
+#define bmSIGRESUME  bmBIT0
+/* Wakeup Control and Status Register (WAKEUPCS) */
+#define bmWU2        bmBIT7
+#define bmWU         bmBIT6
+#define bmWU2POL     bmBIT5
+#define bmWUPOL      bmBIT4
+#define bmDPEN       bmBIT2
+#define bmWU2EN      bmBIT1
+#define bmWUEN       bmBIT0
+/* End Point 0 Control & Status Register (EP0CS) */
+#define bmHSNAK      bmBIT7
+/* End Point 0-1 Control & Status Registers (EP0CS/EP1OUTCS/EP1INCS) */
+#define bmEPBUSY     bmBIT1
+#define bmEPSTALL    bmBIT0
+/* End Point 2-8 Control & Status Registers (EP2CS/EP4CS/EP6CS/EP8CS) */
+#define bmNPAK       (bmBIT6 | bmBIT5 | bmBIT4)
+#define bmEPFULL     bmBIT3
+#define bmEPEMPTY    bmBIT2
+/* Endpoint Status (EP2468STAT) SFR bits */
+#define bmEP8FULL    bmBIT7
+#define bmEP8EMPTY   bmBIT6
+#define bmEP6FULL    bmBIT5
+#define bmEP6EMPTY   bmBIT4
+#define bmEP4FULL    bmBIT3
+#define bmEP4EMPTY   bmBIT2
+#define bmEP2FULL    bmBIT1
+#define bmEP2EMPTY   bmBIT0
+/* SETUP Data Pointer Auto Mode (SUDPTRCTL) */
+#define bmSDPAUTO    bmBIT0
+/* Endpoint Data Toggle Control (TOGCTL) */
+#define bmQUERYTOGGLE  bmBIT7
+#define bmSETTOGGLE    bmBIT6
+#define bmRESETTOGGLE  bmBIT5
+#define bmTOGCTLEPMASK bmBIT3 | bmBIT2 | bmBIT1 | bmBIT0
+/* IBN (In Bulk Nak) enable and request bits (IBNIE/IBNIRQ) */
+#define bmEP8IBN     bmBIT5
+#define bmEP6IBN     bmBIT4
+#define bmEP4IBN     bmBIT3
+#define bmEP2IBN     bmBIT2
+#define bmEP1IBN     bmBIT1
+#define bmEP0IBN     bmBIT0
+
+/* PING-NAK enable and request bits (NAKIE/NAKIRQ) */
+#define bmEP8PING     bmBIT7
+#define bmEP6PING     bmBIT6
+#define bmEP4PING     bmBIT5
+#define bmEP2PING     bmBIT4
+#define bmEP1PING     bmBIT3
+#define bmEP0PING     bmBIT2
+#define bmIBN         bmBIT0
+
+/* Interface Configuration bits (IFCONFIG) */
+#define bmIFCLKSRC    bmBIT7		// set == INTERNAL
+#define bm3048MHZ     bmBIT6		// set == 48 MHz
+#define bmIFCLKOE     bmBIT5
+#define bmIFCLKPOL    bmBIT4
+#define bmASYNC       bmBIT3
+#define bmGSTATE      bmBIT2
+#define bmIFCFG1      bmBIT1
+#define bmIFCFG0      bmBIT0
+#define bmIFCFGMASK   (bmIFCFG0 | bmIFCFG1)
+#define bmIFGPIF      bmIFCFG1
+
+/* EP 2468 FIFO Configuration bits (EP2FIFOCFG,EP4FIFOCFG,EP6FIFOCFG,EP8FIFOCFG) */
+#define bmINFM       bmBIT6
+#define bmOEP        bmBIT5
+#define bmAUTOOUT    bmBIT4
+#define bmAUTOIN     bmBIT3
+#define bmZEROLENIN  bmBIT2
+//   must be zero    bmBIT1
+#define bmWORDWIDE   bmBIT0
+
+/*
+ * Chip Revision Control Bits (REVCTL) - used to ebable/disable revision specific features
+ */ 
+#define bmNOAUTOARM    bmBIT1	// these don't match the docs
+#define bmSKIPCOMMIT   bmBIT0	// these don't match the docs
+
+#define	bmDYN_OUT      bmBIT1	// these do...
+#define	bmENH_PKT      bmBIT0
+
+
+/* Fifo Reset bits (FIFORESET) */
+#define bmNAKALL       bmBIT7
+
+/* Endpoint Configuration (EPxCFG) */
+#define	bmVALID		bmBIT7
+#define	bmIN		bmBIT6
+#define	bmTYPE1		bmBIT5
+#define	bmTYPE0		bmBIT4
+#define	  bmISOCHRONOUS		bmTYPE0
+#define	  bmBULK		bmTYPE1
+#define	  bmINTERRUPT	       (bmTYPE1 | bmTYPE0)
+#define	bm1KBUF		bmBIT3
+#define	bmBUF1		bmBIT1
+#define	bmBUF0		bmBIT0
+#define	  bmQUADBUF		0
+#define	  bmINVALIDBUF		bmBUF0
+#define	  bmDOUBLEBUF		bmBUF1
+#define	  bmTRIPLEBUF		(bmBUF1 | bmBUF0)
+
+/* OUTPKTEND */
+#define	bmSKIP		bmBIT7	// low 4 bits specify which end point
+
+/* GPIFTRIG defs */
+#define	bmGPIF_IDLE		bmBIT7		// status bit
+
+#define	bmGPIF_EP2_START     	     0
+#define	bmGPIF_EP4_START             1
+#define	bmGPIF_EP6_START             2
+#define	bmGPIF_EP8_START             3
+#define	bmGPIF_READ		bmBIT2
+#define	bmGPIF_WRITE		     0
+
+/* EXIF bits */
+#define	bmEXIF_USBINT		bmBIT4
+#define	bmEXIF_I2CINT		bmBIT5
+#define	bmEXIF_IE4		bmBIT6
+#define	bmEXIF_IE5		bmBIT7
+
+
+#endif   /* FX2REGS_H */
diff --git a/firmware/fx2/include/fx2utils.h b/firmware/fx2/include/fx2utils.h
new file mode 100644
index 000000000..b184dec27
--- /dev/null
+++ b/firmware/fx2/include/fx2utils.h
@@ -0,0 +1,31 @@
+/* -*- c -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef _FX2UTILS_H_
+#define _FX2UTILS_H_
+
+void fx2_stall_ep0 (void);
+void fx2_reset_data_toggle (unsigned char ep);
+void fx2_renumerate (void);
+
+
+
+#endif /* _FX2UTILS_H_ */
diff --git a/firmware/fx2/include/generate_regs.py b/firmware/fx2/include/generate_regs.py
new file mode 100755
index 000000000..656cd5e81
--- /dev/null
+++ b/firmware/fx2/include/generate_regs.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+
+import os, os.path
+import re
+import sys
+
+
+# set srcdir to the directory that contains Makefile.am
+try:
+    srcdir = os.environ['srcdir']
+except KeyError, e:
+    srcdir = "."
+srcdir = srcdir + '/'
+
+def open_src (name, mode):
+    global srcdir
+    return open (os.path.join (srcdir, name), mode)
+
+
+def generate_fpga_regs (h_filename, v_filename):
+    const_width = 7                  # bit width of constants
+    
+    h_file = open_src (h_filename, 'r')
+    v_file = open (v_filename, 'w')
+    v_file.write (
+    '''//
+// This file is machine generated from %s
+// Do not edit by hand; your edits will be overwritten.
+//
+''' % (h_filename,))
+
+    pat = re.compile (r'^#define\s*(FR_\w*)\s*(\w*)(.*)$')
+    pat_bitno = re.compile (r'^#define\s*(bitno\w*)\s*(\w*)(.*)$')
+    pat_bm = re.compile (r'^#define\s*(bm\w*)\s*(\w*)(.*)$')
+    for line in h_file:
+        if re.match ('//|\s*$', line):  # comment or blank line
+            v_file.write (line)
+        mo = pat.search (line)
+        mo_bitno =pat_bitno.search (line)
+        mo_bm =pat_bm.search (line)
+        if mo:
+            v_file.write ('`define %-25s %d\'d%s%s\n' % (
+                mo.group (1), const_width, mo.group (2), mo.group (3)))
+        elif mo_bitno:
+            v_file.write ('`define %-25s %s%s\n' % (
+                mo_bitno.group (1), mo_bitno.group (2), mo_bitno.group (3)))
+        elif mo_bm:
+            v_file.write ('`define %-25s %s%s\n' % (
+                mo_bm.group (1), mo_bm.group (2), mo_bm.group (3)))
+    
+
+if __name__ == '__main__':
+    if len (sys.argv) != 3:
+        sys.stderr.write ('usage: %s file.h file.v\n' % (sys.argv[0]))
+        sys.exit (1)
+    generate_fpga_regs (sys.argv[1], sys.argv[2])
+    
diff --git a/firmware/fx2/include/i2c.h b/firmware/fx2/include/i2c.h
new file mode 100644
index 000000000..273526dad
--- /dev/null
+++ b/firmware/fx2/include/i2c.h
@@ -0,0 +1,32 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _I2C_H_
+#define _I2C_H_
+
+// returns non-zero if successful, else 0
+unsigned char i2c_read (unsigned char addr, xdata unsigned char *buf, unsigned char len);
+
+// returns non-zero if successful, else 0
+unsigned char i2c_write (unsigned char addr, xdata const unsigned char *buf, unsigned char len);
+
+#endif /* _I2C_H_ */
diff --git a/firmware/fx2/include/isr.h b/firmware/fx2/include/isr.h
new file mode 100644
index 000000000..856532890
--- /dev/null
+++ b/firmware/fx2/include/isr.h
@@ -0,0 +1,172 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _ISR_H_
+#define _ISR_H_
+
+/*
+ * ----------------------------------------------------------------
+ *	routines for managing interrupt services routines
+ * ----------------------------------------------------------------
+ */
+
+/*
+ * The FX2 has three discrete sets of interrupt vectors.
+ * The first set is the standard 8051 vector (13 8-byte entries).
+ * The second set is USB interrupt autovector (32 4-byte entries).
+ * The third set is the FIFO/GPIF autovector (14 4-byte entries).
+ *
+ * Since all the code we're running in the FX2 is ram based, we
+ * forego the typical "initialize the interrupt vectors at link time"
+ * strategy, in favor of calls at run time that install the correct
+ * pointers to functions.
+ */
+
+/*
+ * Standard Vector numbers
+ */
+
+#define	SV_INT_0		0x03
+#define	SV_TIMER_0		0x0b
+#define	SV_INT_1		0x13
+#define	SV_TIMER_1		0x1b
+#define	SV_SERIAL_0		0x23
+#define	SV_TIMER_2		0x2b
+#define	SV_RESUME		0x33
+#define	SV_SERIAL_1		0x3b
+#define	SV_INT_2		0x43		// (INT_2) points at USB autovector
+#define	SV_I2C			0x4b
+#define	SV_INT_4		0x53		// (INT_4) points at FIFO/GPIF autovector
+#define	SV_INT_5		0x5b
+#define	SV_INT_6		0x63
+
+#define	SV_MIN			SV_INT_0
+#define	SV_MAX			SV_INT_6
+
+/*
+ * USB Auto Vector numbers
+ */
+
+#define	UV_SUDAV		0x00
+#define	UV_SOF			0x04
+#define	UV_SUTOK		0x08
+#define	UV_SUSPEND		0x0c
+#define	UV_USBRESET		0x10
+#define	UV_HIGHSPEED		0x14
+#define	UV_EP0ACK		0x18
+#define	UV_SPARE_1C		0x1c
+#define	UV_EP0IN		0x20
+#define	UV_EP0OUT		0x24
+#define	UV_EP1IN		0x28
+#define	UV_EP1OUT		0x2c
+#define	UV_EP2			0x30
+#define	UV_EP4			0x34
+#define	UV_EP6			0x38
+#define	UV_EP8			0x3c
+#define	UV_IBN			0x40
+#define	UV_SPARE_44		0x44
+#define	UV_EP0PINGNAK		0x48
+#define	UV_EP1PINGNAK		0x4c
+#define	UV_EP2PINGNAK		0x50
+#define	UV_EP4PINGNAK		0x54
+#define	UV_EP6PINGNAK		0x58
+#define	UV_EP8PINGNAK		0x5c
+#define	UV_ERRLIMIT		0x60
+#define	UV_SPARE_64		0x64
+#define	UV_SPARE_68		0x68
+#define	UV_SPARE_6C		0x6c
+#define	UV_EP2ISOERR		0x70
+#define	UV_EP4ISOERR		0x74
+#define	UV_EP6ISOERR		0x78
+#define	UV_EP8ISOERR		0x7c
+
+#define	UV_MIN			UV_SUDAV
+#define	UV_MAX			UV_EP8ISOERR
+
+/*
+ * FIFO/GPIF Auto Vector numbers
+ */
+
+#define	FGV_EP2PF		0x00
+#define	FGV_EP4PF		0x04
+#define	FGV_EP6PF		0x08
+#define	FGV_EP8PF		0x0c
+#define	FGV_EP2EF		0x10
+#define	FGV_EP4EF		0x14
+#define	FGV_EP6EF		0x18
+#define	FGV_EP8EF		0x1c
+#define	FGV_EP2FF		0x20
+#define	FGV_EP4FF		0x24
+#define	FGV_EP6FF		0x28
+#define	FGV_EP8FF		0x2c
+#define	FGV_GPIFDONE		0x30
+#define	FGV_GPIFWF		0x34
+
+#define	FGV_MIN			FGV_EP2PF
+#define	FGV_MAX			FGV_GPIFWF
+
+
+/*
+ * Hook standard interrupt vector.
+ *
+ * vector_number is from the SV_<foo> list above.
+ * addr is the address of the interrupt service routine.
+ */
+void hook_sv (unsigned char vector_number, unsigned short addr);
+
+/*
+ * Hook usb interrupt vector.
+ *
+ * vector_number is from the UV_<foo> list above.
+ * addr is the address of the interrupt service routine.
+ */
+void hook_uv (unsigned char vector_number, unsigned short addr);
+
+/*
+ * Hook fifo/gpif interrupt vector.
+ *
+ * vector_number is from the FGV_<foo> list above.
+ * addr is the address of the interrupt service routine.
+ */
+void hook_fgv (unsigned char vector_number, unsigned short addr);
+
+/*
+ * One time call to enable autovectoring for both USB and FIFO/GPIF
+ */
+void setup_autovectors (void);
+
+
+/*
+ * Must be called in each usb interrupt handler
+ */
+#define	clear_usb_irq()			\
+	EXIF &= ~bmEXIF_USBINT;		\
+	INT2CLR = 0
+
+/*
+ * Must be calledin each fifo/gpif interrupt handler
+ */
+#define	clear_fifo_gpif_irq()		\
+	EXIF &= ~bmEXIF_IE4;		\
+	INT4CLR = 0
+
+#endif /* _ISR_H_ */
diff --git a/firmware/fx2/include/syncdelay.h b/firmware/fx2/include/syncdelay.h
new file mode 100644
index 000000000..0af7d099f
--- /dev/null
+++ b/firmware/fx2/include/syncdelay.h
@@ -0,0 +1,65 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef _SYNCDELAY_H_
+#define _SYNCDELAY_H_
+
+/*
+ * Magic delay required between access to certain xdata registers (TRM page 15-106).
+ * For our configuration, 48 MHz FX2 / 48 MHz IFCLK, we need three cycles.  Each
+ * NOP is a single cycle....
+ *
+ * From TRM page 15-105:
+ *
+ * Under certain conditions, some read and write access to the FX2 registers must
+ * be separated by a "synchronization delay".  The delay is necessary only under the
+ * following conditions:
+ *
+ *   - between a write to any register in the 0xE600 - 0xE6FF range and a write to one
+ *     of the registers listed below.
+ *
+ *   - between a write to one of the registers listed below and a read from any register
+ *     in the 0xE600 - 0xE6FF range.
+ *
+ *   Registers which require a synchronization delay:
+ *
+ *	FIFORESET			FIFOPINPOLAR
+ *	INPKTEND			EPxBCH:L
+ *	EPxFIFOPFH:L			EPxAUTOINLENH:L
+ *	EPxFIFOCFG			EPxGPIFFLGSEL
+ *	PINFLAGSAB			PINFLAGSCD
+ *	EPxFIFOIE			EPxFIFOIRQ
+ *	GPIFIE				GPIFIRQ
+ *	UDMACRCH:L			GPIFADRH:L
+ *	GPIFTRIG			EPxGPIFTRIG
+ *	OUTPKTEND			REVCTL
+ *	GPIFTCB3			GPIFTCB2
+ *	GPIFTCB1			GPIFTCB0
+ */
+
+/*
+ * FIXME ensure that the peep hole optimizer isn't screwing us
+ */
+#define	SYNCDELAY	_asm nop; nop; nop; _endasm
+#define	NOP		_asm nop; _endasm
+
+
+#endif /* _SYNCDELAY_H_ */
diff --git a/firmware/fx2/include/timer.h b/firmware/fx2/include/timer.h
new file mode 100644
index 000000000..3181874d5
--- /dev/null
+++ b/firmware/fx2/include/timer.h
@@ -0,0 +1,35 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _TIMER_H_
+#define _TIMER_H_
+
+/*
+ * Arrange to have isr_tick_handler called at 100 Hz
+ */
+void hook_timer_tick (unsigned short isr_tick_handler);
+
+#define clear_timer_irq()  				\
+	TF2 = 0 	/* clear overflow flag */
+
+
+#endif /* _TIMER_H_ */
diff --git a/firmware/fx2/include/usb_common.h b/firmware/fx2/include/usb_common.h
new file mode 100644
index 000000000..ae07b236c
--- /dev/null
+++ b/firmware/fx2/include/usb_common.h
@@ -0,0 +1,37 @@
+/* -*- c -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _USB_COMMON_H_
+#define _USB_COMMON_H_
+
+extern volatile bit _usb_got_SUDAV;
+
+// Provided by user application to handle VENDOR commands.
+// returns non-zero if it handled the command.
+unsigned char app_vendor_cmd (void);
+
+void usb_install_handlers (void);
+void usb_handle_setup_packet (void);
+
+#define usb_setup_packet_avail()	_usb_got_SUDAV
+
+#endif /* _USB_COMMON_H_ */
diff --git a/firmware/fx2/include/usb_descriptors.h b/firmware/fx2/include/usb_descriptors.h
new file mode 100644
index 000000000..0b8c6212f
--- /dev/null
+++ b/firmware/fx2/include/usb_descriptors.h
@@ -0,0 +1,40 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+extern xdata const char high_speed_device_descr[];
+extern xdata const char high_speed_devqual_descr[];
+extern xdata const char high_speed_config_descr[];
+
+extern xdata const char full_speed_device_descr[];
+extern xdata const char full_speed_devqual_descr[];
+extern xdata const char full_speed_config_descr[];
+
+extern xdata unsigned char nstring_descriptors;
+extern xdata char * xdata string_descriptors[];
+
+/*
+ * We patch these locations with info read from the usrp config eeprom
+ */
+extern xdata char usb_desc_hw_rev_binary_patch_location_0[];
+extern xdata char usb_desc_hw_rev_binary_patch_location_1[];
+extern xdata char usb_desc_hw_rev_ascii_patch_location_0[];
+extern xdata char usb_desc_serial_number_ascii[];
diff --git a/firmware/fx2/include/usb_requests.h b/firmware/fx2/include/usb_requests.h
new file mode 100644
index 000000000..7a543abb0
--- /dev/null
+++ b/firmware/fx2/include/usb_requests.h
@@ -0,0 +1,88 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+// Standard USB requests.
+// These are contained in end point 0 setup packets
+
+
+#ifndef _USB_REQUESTS_H_
+#define _USB_REQUESTS_H_
+
+// format of bmRequestType byte
+
+#define	bmRT_DIR_MASK		(0x1 << 7)
+#define	bmRT_DIR_IN		(1 << 7)
+#define	bmRT_DIR_OUT		(0 << 7)
+
+#define	bmRT_TYPE_MASK		(0x3 << 5)
+#define	bmRT_TYPE_STD		(0 << 5)
+#define	bmRT_TYPE_CLASS		(1 << 5)
+#define	bmRT_TYPE_VENDOR	(2 << 5)
+#define	bmRT_TYPE_RESERVED	(3 << 5)
+
+#define	bmRT_RECIP_MASK		(0x1f << 0)
+#define	bmRT_RECIP_DEVICE	(0 << 0)
+#define	bmRT_RECIP_INTERFACE	(1 << 0)
+#define	bmRT_RECIP_ENDPOINT	(2 << 0)
+#define	bmRT_RECIP_OTHER	(3 << 0)
+
+
+// standard request codes (bRequest)
+
+#define	RQ_GET_STATUS		0
+#define	RQ_CLEAR_FEATURE	1
+#define	RQ_RESERVED_2		2
+#define	RQ_SET_FEATURE		3
+#define	RQ_RESERVED_4		4
+#define	RQ_SET_ADDRESS		5
+#define	RQ_GET_DESCR		6
+#define	RQ_SET_DESCR		7
+#define	RQ_GET_CONFIG		8
+#define	RQ_SET_CONFIG		9
+#define	RQ_GET_INTERFACE       10
+#define	RQ_SET_INTERFACE       11
+#define	RQ_SYNCH_FRAME	       12
+
+// standard descriptor types
+
+#define	DT_DEVICE		1
+#define	DT_CONFIG		2
+#define	DT_STRING		3
+#define	DT_INTERFACE		4
+#define	DT_ENDPOINT		5
+#define	DT_DEVQUAL		6
+#define	DT_OTHER_SPEED		7
+#define	DT_INTERFACE_POWER	8
+
+// standard feature selectors
+
+#define	FS_ENDPOINT_HALT	0	// recip: endpoint
+#define	FS_DEV_REMOTE_WAKEUP	1	// recip: device
+#define	FS_TEST_MODE		2	// recip: device
+
+// Get Status device attributes
+
+#define	bmGSDA_SELF_POWERED	0x01
+#define	bmGSDA_REM_WAKEUP	0x02
+
+
+#endif /* _USB_REQUESTS_H_ */
diff --git a/firmware/fx2/include/usrp_commands.h b/firmware/fx2/include/usrp_commands.h
new file mode 100644
index 000000000..02778c7e3
--- /dev/null
+++ b/firmware/fx2/include/usrp_commands.h
@@ -0,0 +1,106 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003,2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _USRP_COMMANDS_H_
+#define _USRP_COMMANDS_H_
+
+#include <usrp_interfaces.h>
+#include <usrp_spi_defs.h>
+
+#define	MAX_EP0_PKTSIZE		       64	// max size of EP0 packet on FX2
+
+// ----------------------------------------------------------------
+//			Vendor bmRequestType's
+// ----------------------------------------------------------------
+
+#define	VRT_VENDOR_IN			0xC0
+#define	VRT_VENDOR_OUT			0x40
+
+// ----------------------------------------------------------------
+//			  USRP Vendor Requests
+//
+// Note that Cypress reserves [0xA0,0xAF].
+// 0xA0 is the firmware load function.
+// ----------------------------------------------------------------
+
+
+// IN commands
+
+#define	VRQ_GET_STATUS			0x80
+#define		GS_TX_UNDERRUN			0	// wIndexL	// returns 1 byte
+#define		GS_RX_OVERRUN			1	// wIndexL	// returns 1 byte
+
+#define	VRQ_I2C_READ			0x81		// wValueL: i2c address; length: how much to read
+
+#define	VRQ_SPI_READ			0x82		// wValue: optional header bytes
+							// wIndexH:	enables
+							// wIndexL:	format
+							// len: how much to read
+
+#define	VRQ_SPI_TRANSACT		0x83		// wValueH:  OUT byte 0
+							// wValueL:  OUT byte 1
+							// wIndexH:  OUT byte 2
+							// wIndexL:  OUT byte 3 
+							// wLengthH: enables 
+							// wLengthL: transaction length
+
+// OUT commands
+
+#define	VRQ_SET_LED			0x01		// wValueL off/on {0,1}; wIndexL: which {0,1}
+
+#define	VRQ_FPGA_LOAD			0x02
+#  define	FL_BEGIN			0	// wIndexL: begin fpga programming cycle.  stalls if trouble.
+#  define	FL_XFER				1	// wIndexL: xfer up to 64 bytes of data
+#  define	FL_END				2	// wIndexL: end programming cycle, check for success.
+							//          stalls endpoint if trouble.
+
+#define	VRQ_FPGA_WRITE_REG		0x03		// wIndexL: regno; data: 32-bit regval MSB first
+#define	VRQ_FPGA_SET_RESET		0x04		// wValueL: {0,1}
+#define	VRQ_FPGA_SET_TX_ENABLE		0x05		// wValueL: {0,1}
+#define	VRQ_FPGA_SET_RX_ENABLE		0x06		// wValueL: {0,1}
+// see below VRQ_FPGA_SET_{TX,RX}_RESET
+
+#define	VRQ_SET_SLEEP_BITS		0x07		// wValueH: mask; wValueL: bits.  set bits given by mask to bits
+
+#  define	SLEEP_ADC0			0x01
+#  define	SLEEP_ADC1			0x02
+#  define	SLEEP_DAC0			0x04
+#  define	SLEEP_DAC1			0x08
+
+#define	VRQ_I2C_WRITE			0x08		// wValueL: i2c address; data: data
+
+#define	VRQ_SPI_WRITE			0x09		// wValue: optional header bytes
+							// wIndexH:	enables
+							// wIndexL:	format
+							// len: how much to write
+
+#define	VRQ_FPGA_SET_TX_RESET		0x0a		// wValueL: {0, 1}
+#define	VRQ_FPGA_SET_RX_RESET		0x0b		// wValueL: {0, 1}
+
+
+// -------------------------------------------------------------------
+// we store the hashes at fixed addresses in the FX2 internal memory
+
+#define	  USRP_HASH_SLOT_0_ADDR			0xe1e0
+#define	  USRP_HASH_SLOT_1_ADDR			0xe1f0
+
+
+
+#endif /* _USRP_COMMANDS_H_ */
diff --git a/firmware/fx2/include/usrp_config.h b/firmware/fx2/include/usrp_config.h
new file mode 100644
index 000000000..e77f8e4c5
--- /dev/null
+++ b/firmware/fx2/include/usrp_config.h
@@ -0,0 +1,44 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+/*
+ * configuration stuff for debugging
+ */
+
+/*
+ * Define to 0 for normal use of port A, i.e., FPGA control bus.
+ * Define to 1 to write trace to port A for scoping with logic analyzer.
+ */
+#define	UC_TRACE_USING_PORT_A			0
+
+
+/*
+ * Define to 0 for normal use of low 3 bits of port E, i.e., A/D, D/A SLEEP bits.
+ * Define to 1 to enable by default driving the GPIF state to the
+ * low three bits of port E.
+ */
+#define UC_START_WITH_GSTATE_OUTPUT_ENABLED	0
+
+
+/*
+ * Define to 1 for normal use (the board really has an FPGA on it).
+ * Define to 0 for debug use on board without FPGA.
+ */
+#define UC_BOARD_HAS_FPGA			1
diff --git a/firmware/fx2/include/usrp_i2c_addr.h b/firmware/fx2/include/usrp_i2c_addr.h
new file mode 100644
index 000000000..0a4f3ea59
--- /dev/null
+++ b/firmware/fx2/include/usrp_i2c_addr.h
@@ -0,0 +1,78 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDED_USRP_I2C_ADDR_H
+#define INCLUDED_USRP_I2C_ADDR_H
+
+// I2C addresses
+
+#define I2C_DEV_EEPROM	0x50		// 24LC02[45]:  7-bits 1010xxx
+
+#define	I2C_ADDR_BOOT	(I2C_DEV_EEPROM	| 0x0)
+#define	I2C_ADDR_TX_A	(I2C_DEV_EEPROM | 0x4)
+#define	I2C_ADDR_RX_A	(I2C_DEV_EEPROM | 0x5)
+#define	I2C_ADDR_TX_B	(I2C_DEV_EEPROM	| 0x6)
+#define	I2C_ADDR_RX_B	(I2C_DEV_EEPROM | 0x7)
+
+
+// format of FX2 BOOT EEPROM
+//	00: 0xC0	code for ``Read IDs from EEPROM''
+//	01: 0xFE	USB Vendor ID (LSB)
+//	02: 0xFF	USB Vendor ID (MSB)
+//	03: 0x02	USB Product ID (LSB)
+//	04: 0x00	USB Product ID (MSB)
+//	05: 0x01	USB Device ID (LSB)	// rev1
+//	06: 0x00	USB Device ID (MSB)	// 0 = unconfig'd (no firmware)
+//	07: 0x00	option byte
+
+
+// format of daughterboard EEPROM
+//	00: 0xDB	code for ``I'm a daughterboard''
+//	01:   ..	Daughterboard ID (LSB)
+//	02:   ..	Daughterboard ID (MSB)
+//	03:   ..	io bits  7-0 direction (bit set if it's an output from m'board)
+//	04:   ..	io bits 15-8 direction (bit set if it's an output from m'board)
+//	05:   ..	ADC0 DC offset correction (LSB)
+//	06:   ..	ADC0 DC offset correction (MSB)
+//	07:   ..	ADC1 DC offset correction (LSB)
+//	08:   ..	ADC1 DC offset correction (MSB)
+// 	...
+//	1f:   ..	negative of the sum of bytes [0x00, 0x1e]
+
+#define	DB_EEPROM_MAGIC		0x00
+#define	  DB_EEPROM_MAGIC_VALUE			0xDB
+#define	DB_EEPROM_ID_LSB		0x01
+#define	DB_EEPROM_ID_MSB		0x02
+#define	DB_EEPROM_OE_LSB		0x03
+#define	DB_EEPROM_OE_MSB		0x04
+#define	DB_EEPROM_OFFSET_0_LSB		0x05	// offset correction for ADC or DAC 0
+#define	DB_EEPROM_OFFSET_0_MSB		0x06
+#define	DB_EEPROM_OFFSET_1_LSB		0x07	// offset correction for ADC or DAC 1
+#define	DB_EEPROM_OFFSET_1_MSB		0x08
+#define	DB_EEPROM_CHKSUM		0x1f
+
+#define	DB_EEPROM_CLEN			0x20	// length of common portion of eeprom
+
+#define	DB_EEPROM_CUSTOM_BASE		DB_EEPROM_CLEN	// first avail offset for
+							//   daughterboard specific use
+
+#endif /* INCLUDED_USRP_I2C_ADDR_H */
+
diff --git a/firmware/fx2/include/usrp_ids.h b/firmware/fx2/include/usrp_ids.h
new file mode 100644
index 000000000..46a069434
--- /dev/null
+++ b/firmware/fx2/include/usrp_ids.h
@@ -0,0 +1,68 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2006,2007 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/*
+ * USB Vendor and Product IDs that we use
+ *
+ * (keep in sync with usb_descriptors.a51)
+ */
+
+#ifndef _USRP_IDS_H_
+#define _USRP_IDS_H_
+
+#define	USB_VID_CYPRESS			0x04b4
+#define	USB_PID_CYPRESS_FX2		0x8613
+
+
+#define	USB_VID_FSF			0xfffe	  // Free Software Folks
+#define	USB_PID_FSF_EXP_0		0x0000	  // Experimental 0
+#define	USB_PID_FSF_EXP_1		0x0001	  // Experimental 1
+#define	USB_PID_FSF_USRP		0x0002	  // Universal Software Radio Peripheral
+#define	USB_PID_FSF_USRP_reserved	0x0003	  // Universal Software Radio Peripheral
+#define	USB_PID_FSF_SSRP		0x0004	  // Simple Software Radio Peripheral
+#define	USB_PID_FSF_SSRP_reserved	0x0005	  // Simple Software Radio Peripheral
+#define USB_PID_FSF_HPSDR               0x0006    // High Performance Software Defined Radio (Internal Boot)
+#define USB_PID_FSF_HPSDR_HA    	0x0007    // High Performance Software Defined Radio (Host Assisted Boot)
+#define USB_PID_FSF_QS1R	    	0x0008    // QS1R HF receiver
+#define USB_PID_FSF_EZDOP	    	0x0009    // ezdop <jcorgan@aeinet.com>
+#define USB_PID_FSF_BDALE_0		0x000a	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_1		0x000b	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_2		0x000c	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_3		0x000d	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_4		0x000e	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_5		0x000f	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_6		0x0010	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_7		0x0011	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_8		0x0012	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_BDALE_9		0x0013	  // Bdale Garbee <bdale@gag.com>
+#define USB_PID_FSF_HPSDR_HERMES	0x0014	  // HPSDR Hermes
+#define USB_PID_FSF_THINKRF		0x0015	  // Catalin Patulea <catalin.patulea@thinkrf.com>
+#define USB_PID_FSF_MSA			0x0016	  // Hans de Bok <hdbok@dionaea.demon.nl> Scotty's Modular Spectrum Analyzer
+
+#define USB_PID_FSF_LBNL_UXO            0x0018    // http://recycle.lbl.gov/~ldoolitt/uxo/
+
+
+#define	USB_DID_USRP_0			0x0000	  // unconfigured rev 0 USRP
+#define	USB_DID_USRP_1			0x0001	  // unconfigured rev 1 USRP
+#define	USB_DID_USRP_2			0x0002	  // unconfigured rev 2 USRP
+
+#endif /* _USRP_IDS_H_ */
diff --git a/firmware/fx2/include/usrp_interfaces.h b/firmware/fx2/include/usrp_interfaces.h
new file mode 100644
index 000000000..8666e0490
--- /dev/null
+++ b/firmware/fx2/include/usrp_interfaces.h
@@ -0,0 +1,47 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef _USRP_INTERFACES_H_
+#define _USRP_INTERFACES_H_
+
+/*
+ * We've now split the USRP into 3 separate interfaces.
+ *
+ * Interface 0 contains only ep0 and is used for command and status.
+ * Interface 1 is the Tx path and it uses ep2 OUT BULK.
+ * Interface 2 is the Rx path and it uses ep6 IN BULK.
+ */
+ 
+#define	USRP_CMD_INTERFACE		0
+#define	USRP_CMD_ALTINTERFACE		0
+#define	USRP_CMD_ENDPOINT		0
+
+#define	USRP_TX_INTERFACE		1
+#define	USRP_TX_ALTINTERFACE		0
+#define	USRP_TX_ENDPOINT		2	// streaming data from host to FPGA
+
+#define	USRP_RX_INTERFACE		2
+#define	USRP_RX_ALTINTERFACE		0
+#define	USRP_RX_ENDPOINT		6	// streaming data from FPGA to host
+
+
+#endif /* _USRP_INTERFACES_H_ */
diff --git a/firmware/fx2/include/usrp_spi_defs.h b/firmware/fx2/include/usrp_spi_defs.h
new file mode 100644
index 000000000..963463ef2
--- /dev/null
+++ b/firmware/fx2/include/usrp_spi_defs.h
@@ -0,0 +1,86 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_USRP_SPI_DEFS_H
+#define INCLUDED_USRP_SPI_DEFS_H
+
+/*
+ * defines for the VRQ_SPI_READ and VRQ_SPI_WRITE commands
+ *
+ * SPI == "Serial Port Interface".  SPI is a 3 wire bus plus a
+ * separate enable for each peripheral.  The common lines are SCLK,
+ * SDI and SDO.  The FX2 always drives SCLK and SDI, the clock and
+ * data lines from the FX2 to the peripheral.  When enabled, a
+ * peripheral may drive SDO, the data line from the peripheral to the
+ * FX2.
+ *
+ * The SPI_READ and SPI_WRITE commands are formatted identically.
+ * Each specifies which peripherals to enable, whether the bits should
+ * be transmistted Most Significant Bit first or Least Significant Bit
+ * first, the number of bytes in the optional header, and the number
+ * of bytes to read or write in the body.
+ *
+ * The body is limited to 64 bytes.  The optional header may contain
+ * 0, 1 or 2 bytes.  For an SPI_WRITE, the header bytes are
+ * transmitted to the peripheral followed by the the body bytes.  For
+ * an SPI_READ, the header bytes are transmitted to the peripheral,
+ * then len bytes are read back from the peripheral.
+ */
+
+/*
+ * SPI_FMT_* goes in wIndexL
+ */
+#define SPI_FMT_xSB_MASK	(1 << 7)
+#  define	SPI_FMT_LSB	(1 << 7)	// least signficant bit first
+#  define	SPI_FMT_MSB	(0 << 7)	// most significant bit first
+#define	SPI_FMT_HDR_MASK	(3 << 5)
+#  define	SPI_FMT_HDR_0	(0 << 5)	// 0 header bytes
+#  define	SPI_FMT_HDR_1	(1 << 5)	// 1 header byte
+#  define	SPI_FMT_HDR_2	(2 << 5)	// 2 header bytes
+
+/*
+ * SPI_ENABLE_*  goes in wIndexH
+ *
+ * For the software interface, the enables are active high.
+ * For reads, it's an error to have more than one enable set.
+ *
+ * [FWIW, the hardware implements them as active low.  Don't change the
+ * definitions of these.  They are related to usrp_rev1_regs.h]
+ */
+#define	SPI_ENABLE_FPGA		0x01	// select FPGA
+#define	SPI_ENABLE_CODEC_A	0x02	// select AD9862 A
+#define	SPI_ENABLE_CODEC_B	0x04	// select AD9862 B
+#define	SPI_ENABLE_reserved	0x08
+#define	SPI_ENABLE_TX_A		0x10	// select d'board TX A
+#define	SPI_ENABLE_RX_A		0x20	// select d'board RX A
+#define	SPI_ENABLE_TX_B		0x40	// select d'board TX B
+#define	SPI_ENABLE_RX_B		0x80	// select d'board RX B
+
+/*
+ * If there's one header byte, it goes in wValueL.
+ *
+ * If there are two header bytes, they go in wValueH | wValueL.
+ * The transmit order of the bytes (and bits within them) is 
+ * determined by SPI_FMT_*SB
+ */
+ 
+#endif /* INCLUDED_USRP_SPI_DEFS_H */
diff --git a/firmware/fx2/lib/.gitignore b/firmware/fx2/lib/.gitignore
new file mode 100644
index 000000000..04f253234
--- /dev/null
+++ b/firmware/fx2/lib/.gitignore
@@ -0,0 +1,18 @@
+/*.ihx
+/*.lnk
+/*.lst
+/*.map
+/*.mem
+/*.rel
+/*.rst
+/*.sym
+/blink_leds.asm
+/usrp_common.asm
+/command_loop.asm
+/fpga.asm
+/*.asm
+/usrp_gpif.c
+/usrp_gpif_inline.h
+/*.lib
+/Makefile
+/Makefile.in
diff --git a/firmware/fx2/lib/Makefile.am b/firmware/fx2/lib/Makefile.am
new file mode 100644
index 000000000..f9e1b2317
--- /dev/null
+++ b/firmware/fx2/lib/Makefile.am
@@ -0,0 +1,79 @@
+#
+# Copyright 2003 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+EXTRA_DIST = 		\
+	delay.c		\
+	fx2utils.c	\
+	i2c.c		\
+	isr.c		\
+	timer.c		\
+	usb_common.c
+
+
+
+DEFINES=
+FW_INCLUDES=-I$(top_srcdir)/include
+
+# with EA = 0, the FX2 implements a portion of the 8051 "external memory"
+# on chip.  This memory is mapped like this:
+#
+# The bottom 8K of memory (0x0000 - 0x1fff) is used for both data and
+# code accesses.  There's also 512 bytes for data only from 0xe000 - 0xe1ff.
+#
+# We tell the linker to start the xdata segment at 0x1800, 6K up from
+# the bottom.
+
+LINKOPTS = --code-loc 0x0000 --code-size 0x1800 --xram-loc 0x1800 --xram-size 0x0800
+
+LIBRARY = libfx2.lib
+
+LIBOBJS = 		\
+	delay.rel	\
+	fx2utils.rel	\
+	i2c.rel		\
+	isr.rel		\
+	timer.rel	\
+	usb_common.rel
+
+
+
+all: libfx2.lib
+
+.c.rel:
+	$(XCC) $(FW_INCLUDES) $(DEFINES) -c $< -o $@
+
+$(LIBRARY): $(LIBOBJS)
+	-rm -f $(LIBRARY)
+	touch $(LIBRARY)
+	for obj in $(LIBOBJS); do basename $$obj .rel >> $(LIBRARY) ; done
+
+
+CLEANFILES = \
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib
+
+DISTCLEANFILES = \
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib
+
+install: all
+
+
+# dependencies
+
diff --git a/firmware/fx2/lib/delay.c b/firmware/fx2/lib/delay.c
new file mode 100644
index 000000000..13cf0eec8
--- /dev/null
+++ b/firmware/fx2/lib/delay.c
@@ -0,0 +1,76 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/*
+ * Delay approximately 1 microsecond (including overhead in udelay).
+ */
+static void
+udelay1 (void) _naked
+{
+  _asm				; lcall that got us here took 4 bus cycles
+	ret			; 4 bus cycles
+  _endasm;
+}
+
+/*
+ * delay for approximately usecs microseconds
+ */
+void
+udelay (unsigned char usecs)
+{
+  do {
+    udelay1 ();
+  } while (--usecs != 0);
+}
+
+
+/*
+ * Delay approximately 1 millisecond.
+ * We're running at 48 MHz, so we need 48,000 clock cycles.
+ *
+ * Note however, that each bus cycle takes 4 clock cycles (not obvious,
+ * but explains the factor of 4 problem below).
+ */
+static void
+mdelay1 (void) _naked
+{
+  _asm
+	mov	dptr,#(-1200 & 0xffff)
+002$:	
+	inc	dptr		; 3 bus cycles
+	mov	a, dpl		; 2 bus cycles
+	orl	a, dph		; 2 bus cycles
+	jnz	002$		; 3 bus cycles
+
+	ret
+  _endasm;
+}
+
+void
+mdelay (unsigned int msecs)
+{
+  do {
+    mdelay1 ();
+  } while (--msecs != 0);
+}
+
+	
diff --git a/firmware/fx2/lib/fx2utils.c b/firmware/fx2/lib/fx2utils.c
new file mode 100644
index 000000000..64ffcc896
--- /dev/null
+++ b/firmware/fx2/lib/fx2utils.c
@@ -0,0 +1,54 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "fx2utils.h"
+#include "fx2regs.h"
+#include "delay.h"
+
+void
+fx2_stall_ep0 (void)
+{
+  EP0CS |= bmEPSTALL;
+}
+
+void
+fx2_reset_data_toggle (unsigned char ep)
+{
+  TOGCTL = ((ep & 0x80) >> 3 | (ep & 0x0f));
+  TOGCTL |= bmRESETTOGGLE;
+}
+
+void
+fx2_renumerate (void)
+{
+  USBCS |= bmDISCON | bmRENUM;
+
+  // mdelay (1500);		// FIXME why 1.5 seconds?
+  mdelay (250);			// FIXME why 1.5 seconds?
+  
+  USBIRQ = 0xff;		// clear any pending USB irqs...
+  EPIRQ =  0xff;		//   they're from before the renumeration
+
+  EXIF &= ~bmEXIF_USBINT;
+
+  USBCS &= ~bmDISCON;		// reconnect USB
+}
diff --git a/firmware/fx2/lib/i2c-compiler-bug.c b/firmware/fx2/lib/i2c-compiler-bug.c
new file mode 100644
index 000000000..360b779bc
--- /dev/null
+++ b/firmware/fx2/lib/i2c-compiler-bug.c
@@ -0,0 +1,129 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "i2c.h"
+#include "fx2regs.h"
+#include <string.h>
+
+
+// issue a stop bus cycle and wait for completion
+
+
+// returns non-zero if successful, else 0
+unsigned char
+i2c_read (unsigned char addr, xdata unsigned char *buf, unsigned char len)
+{
+  volatile unsigned char	junk;
+  
+  if (len == 0)			// reading zero bytes always works
+    return 1;
+  
+  // memset (buf, 0, len);		// FIXME, remove
+
+  while (I2CS & bmSTOP)		// wait for stop to clear
+    ;
+
+
+  I2CS = bmSTART;
+  I2DAT = (addr << 1) | 1;	// write address and direction (1's the read bit)
+
+  while ((I2CS & bmDONE) == 0)
+    ;
+
+  if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+    goto fail;
+
+  if (len == 1)
+    I2CS |= bmLASTRD;		
+
+  junk = I2DAT;			// trigger the first read cycle
+
+#if 1
+  while (len != 1){
+    while ((I2CS & bmDONE) == 0)
+      ;
+
+    if (I2CS & bmBERR)
+      goto fail;
+
+    len--;
+    if (len == 1)
+      I2CS |= bmLASTRD;
+    
+    *buf++ = I2DAT;		// get data, trigger another read
+  }
+#endif
+
+  // wait for final byte
+  
+  while ((I2CS & bmDONE) == 0)
+    ;
+  
+  if (I2CS & bmBERR)
+    goto fail;
+
+  I2CS |= bmSTOP;
+  *buf = I2DAT;
+
+  return 1;
+
+ fail:
+  I2CS |= bmSTOP;
+  return 0;
+}
+
+
+
+// returns non-zero if successful, else 0
+unsigned char
+i2c_write (unsigned char addr, xdata const unsigned char *buf, unsigned char len)
+{
+  while (I2CS & bmSTOP)		// wait for stop to clear
+    ;
+
+  I2CS = bmSTART;
+  I2DAT = (addr << 1) | 0;	// write address and direction (0's the write bit)
+
+  while ((I2CS & bmDONE) == 0)
+    ;
+
+  if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+    goto fail;
+
+  while (len > 0){
+    I2DAT = *buf++;
+    len--;
+
+    while ((I2CS & bmDONE) == 0)
+      ;
+
+    if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+      goto fail;
+  }
+
+  I2CS |= bmSTOP;
+  return 1;
+
+ fail:
+  I2CS |= bmSTOP;
+  return 0;
+}
diff --git a/firmware/fx2/lib/i2c.c b/firmware/fx2/lib/i2c.c
new file mode 100644
index 000000000..0f238b5cf
--- /dev/null
+++ b/firmware/fx2/lib/i2c.c
@@ -0,0 +1,123 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "i2c.h"
+#include "fx2regs.h"
+#include <string.h>
+
+
+// issue a stop bus cycle and wait for completion
+
+
+// returns non-zero if successful, else 0
+unsigned char
+i2c_read (unsigned char addr, xdata unsigned char *buf, unsigned char len)
+{
+  volatile unsigned char	junk;
+  
+  if (len == 0)			// reading zero bytes always works
+    return 1;
+  
+  while (I2CS & bmSTOP)		// wait for stop to clear
+    ;
+
+  I2CS = bmSTART;
+  I2DAT = (addr << 1) | 1;	// write address and direction (1's the read bit)
+
+  while ((I2CS & bmDONE) == 0)
+    ;
+
+  if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+    goto fail;
+
+  if (len == 1)
+    I2CS |= bmLASTRD;		
+
+  junk = I2DAT;			// trigger the first read cycle
+
+  while (--len != 0){
+    while ((I2CS & bmDONE) == 0)
+      ;
+
+    if (I2CS & bmBERR)
+      goto fail;
+
+    if (len == 1)
+      I2CS |= bmLASTRD;
+    
+    *buf++ = I2DAT;		// get data, trigger another read
+  }
+
+  // wait for final byte
+  
+  while ((I2CS & bmDONE) == 0)
+    ;
+  
+  if (I2CS & bmBERR)
+    goto fail;
+
+  I2CS |= bmSTOP;
+  *buf = I2DAT;
+
+  return 1;
+
+ fail:
+  I2CS |= bmSTOP;
+  return 0;
+}
+
+
+
+// returns non-zero if successful, else 0
+unsigned char
+i2c_write (unsigned char addr, xdata const unsigned char *buf, unsigned char len)
+{
+  while (I2CS & bmSTOP)		// wait for stop to clear
+    ;
+
+  I2CS = bmSTART;
+  I2DAT = (addr << 1) | 0;	// write address and direction (0's the write bit)
+
+  while ((I2CS & bmDONE) == 0)
+    ;
+
+  if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+    goto fail;
+
+  while (len > 0){
+    I2DAT = *buf++;
+    len--;
+
+    while ((I2CS & bmDONE) == 0)
+      ;
+
+    if ((I2CS & bmBERR) || (I2CS & bmACK) == 0)	// no device answered...
+      goto fail;
+  }
+
+  I2CS |= bmSTOP;
+  return 1;
+
+ fail:
+  I2CS |= bmSTOP;
+  return 0;
+}
diff --git a/firmware/fx2/lib/isr.c b/firmware/fx2/lib/isr.c
new file mode 100644
index 000000000..05412daf5
--- /dev/null
+++ b/firmware/fx2/lib/isr.c
@@ -0,0 +1,167 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "isr.h"
+#include "fx2regs.h"
+#include "syncdelay.h"
+
+extern xdata unsigned char _standard_interrupt_vector[];
+extern xdata unsigned char _usb_autovector[];
+extern xdata unsigned char _fifo_gpif_autovector[];
+
+#define LJMP_OPCODE	0x02
+
+/*
+ * Hook standard interrupt vector.
+ *
+ * vector_number is from the SV_<foo> list.
+ * addr is the address of the interrupt service routine.
+ */
+void 
+hook_sv (unsigned char vector_number, unsigned short addr)
+{
+  bit	t;
+  
+  // sanity checks
+
+  if (vector_number < SV_MIN || vector_number > SV_MAX)
+    return;
+
+  if ((vector_number & 0x0f) != 0x03 && (vector_number & 0x0f) != 0x0b)
+    return;
+
+  t = EA;
+  EA = 0;
+  _standard_interrupt_vector[vector_number] = LJMP_OPCODE;
+  _standard_interrupt_vector[vector_number + 1] = addr >> 8;
+  _standard_interrupt_vector[vector_number + 2] = addr & 0xff;
+  EA = t;
+}
+
+/*
+ * Hook usb interrupt vector.
+ *
+ * vector_number is from the UV_<foo> list.
+ * addr is the address of the interrupt service routine.
+ */
+void 
+hook_uv (unsigned char vector_number, unsigned short addr)
+{
+  bit	t;
+  
+  // sanity checks
+
+  if (vector_number < UV_MIN || vector_number > UV_MAX)
+    return;
+
+  if ((vector_number & 0x3) != 0)
+    return;
+
+  t = EA;
+  EA = 0;
+  _usb_autovector[vector_number] = LJMP_OPCODE;
+  _usb_autovector[vector_number + 1] = addr >> 8;
+  _usb_autovector[vector_number + 2] = addr & 0xff;
+  EA = t;
+}
+
+/*
+ * Hook fifo/gpif interrupt vector.
+ *
+ * vector_number is from the FGV_<foo> list.
+ * addr is the address of the interrupt service routine.
+ */
+void 
+hook_fgv (unsigned char vector_number, unsigned short addr)
+{
+  bit	t;
+  
+  // sanity checks
+
+  if (vector_number < FGV_MIN || vector_number > FGV_MAX)
+    return;
+
+  if ((vector_number & 0x3) != 0)
+    return;
+
+  t = EA;
+  EA = 0;
+  _fifo_gpif_autovector[vector_number] = LJMP_OPCODE;
+  _fifo_gpif_autovector[vector_number + 1] = addr >> 8;
+  _fifo_gpif_autovector[vector_number + 2] = addr & 0xff;
+  EA = t;
+}
+
+/*
+ * One time call to enable autovectoring for both USB and FIFO/GPIF.
+ *
+ * This disables all USB and FIFO/GPIF interrupts and clears
+ * any pending interrupts too.  It leaves the master USB and FIFO/GPIF
+ * interrupts enabled.
+ */
+void
+setup_autovectors (void)
+{
+  // disable master usb and fifo/gpif interrupt enables
+  EIUSB = 0;
+  EIEX4 = 0;
+
+  hook_sv (SV_INT_2, (unsigned short) _usb_autovector);
+  hook_sv (SV_INT_4, (unsigned short) _fifo_gpif_autovector);
+
+  // disable all fifo interrupt enables
+  SYNCDELAY;
+  EP2FIFOIE = 0;	SYNCDELAY;
+  EP4FIFOIE = 0;	SYNCDELAY;
+  EP6FIFOIE = 0;	SYNCDELAY;
+  EP8FIFOIE = 0;	SYNCDELAY;
+
+  // clear all pending fifo irqs	
+  EP2FIFOIRQ = 0xff;	SYNCDELAY;
+  EP4FIFOIRQ = 0xff;	SYNCDELAY;
+  EP6FIFOIRQ = 0xff;	SYNCDELAY;
+  EP8FIFOIRQ = 0xff;	SYNCDELAY;
+
+  IBNIE  = 0;
+  IBNIRQ = 0xff;
+  NAKIE  = 0;
+  NAKIRQ = 0xff;
+  USBIE  = 0;
+  USBIRQ = 0xff;
+  EPIE   = 0;
+  EPIRQ  = 0xff;
+  SYNCDELAY;	GPIFIE = 0;		
+  SYNCDELAY;	GPIFIRQ = 0xff;
+  USBERRIE = 0;
+  USBERRIRQ = 0xff;
+  CLRERRCNT = 0;
+  
+  INTSETUP = bmAV2EN | bmAV4EN | bmINT4IN;
+
+  // clear master irq's for usb and fifo/gpif
+  EXIF &= ~bmEXIF_USBINT;
+  EXIF &= ~bmEXIF_IE4;
+  
+  // enable master usb and fifo/gpif interrrupts
+  EIUSB = 1;
+  EIEX4 = 1;
+}
diff --git a/firmware/fx2/lib/timer.c b/firmware/fx2/lib/timer.c
new file mode 100644
index 000000000..97e2f7cf9
--- /dev/null
+++ b/firmware/fx2/lib/timer.c
@@ -0,0 +1,49 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "timer.h"
+#include "fx2regs.h"
+#include "isr.h"
+
+/*
+ * Arrange to have isr_tick_handler called at 100 Hz.
+ *
+ * The cpu clock is running at 48e6.  The input to the timer
+ * is 48e6 / 12 = 4e6.
+ *
+ * We arrange to have the timer overflow every 40000 clocks == 100 Hz
+ */
+
+#define	RELOAD_VALUE	((unsigned short) -40000)
+
+void 
+hook_timer_tick (unsigned short isr_tick_handler)
+{
+  ET2 = 0;			// disable timer 2 interrupts
+  hook_sv (SV_TIMER_2, isr_tick_handler);
+  
+  RCAP2H = RELOAD_VALUE >> 8;	// setup the auto reload value
+  RCAP2L = RELOAD_VALUE;
+
+  T2CON = 0x04;			// interrupt on overflow; reload; run
+  ET2 = 1;			// enable timer 2 interrupts
+}
diff --git a/firmware/fx2/lib/usb_common.c b/firmware/fx2/lib/usb_common.c
new file mode 100644
index 000000000..3b0547b2f
--- /dev/null
+++ b/firmware/fx2/lib/usb_common.c
@@ -0,0 +1,386 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "usb_common.h"
+#include "fx2regs.h"
+#include "syncdelay.h"
+#include "fx2utils.h"
+#include "isr.h"
+#include "usb_descriptors.h"
+#include "usb_requests.h"
+
+extern xdata char str0[];
+extern xdata char str1[];
+extern xdata char str2[];
+extern xdata char str3[];
+extern xdata char str4[];
+extern xdata char str5[];
+
+
+#define	bRequestType	SETUPDAT[0]
+#define	bRequest	SETUPDAT[1]
+#define	wValueL		SETUPDAT[2]
+#define	wValueH		SETUPDAT[3]
+#define	wIndexL		SETUPDAT[4]
+#define	wIndexH		SETUPDAT[5]
+#define	wLengthL	SETUPDAT[6]
+#define	wLengthH	SETUPDAT[7]
+
+#define MSB(x)	(((unsigned short) x) >> 8)
+#define LSB(x)	(((unsigned short) x) & 0xff)
+
+volatile bit _usb_got_SUDAV;
+
+unsigned char	_usb_config = 0;
+unsigned char	_usb_alt_setting = 0;	// FIXME really 1/interface
+
+xdata unsigned char *current_device_descr;
+xdata unsigned char *current_devqual_descr;
+xdata unsigned char *current_config_descr;
+xdata unsigned char *other_config_descr;
+
+static void
+setup_descriptors (void)
+{
+  if (USBCS & bmHSM){		// high speed mode
+    current_device_descr  = high_speed_device_descr;
+    current_devqual_descr = high_speed_devqual_descr;
+    current_config_descr  = high_speed_config_descr;
+    other_config_descr    = full_speed_config_descr;
+  }
+  else {
+    current_device_descr  = full_speed_device_descr;
+    current_devqual_descr = full_speed_devqual_descr;
+    current_config_descr  = full_speed_config_descr;
+    other_config_descr    = high_speed_config_descr;
+  }
+
+  // whack the type fields
+  // FIXME, may not be required.
+  // current_config_descr[1] = DT_CONFIG;
+  // other_config_descr[1]   = DT_OTHER_SPEED;
+}
+
+static void
+isr_SUDAV (void) interrupt
+{
+  clear_usb_irq ();
+  _usb_got_SUDAV = 1;
+}
+
+static void
+isr_USBRESET (void) interrupt
+{
+  clear_usb_irq ();
+  setup_descriptors ();
+}
+
+static void
+isr_HIGHSPEED (void) interrupt
+{
+  clear_usb_irq ();
+  setup_descriptors ();
+}
+
+void
+usb_install_handlers (void)
+{
+  setup_descriptors ();	    // ensure that they're set before use
+
+  hook_uv (UV_SUDAV,     (unsigned short) isr_SUDAV);
+  hook_uv (UV_USBRESET,  (unsigned short) isr_USBRESET);
+  hook_uv (UV_HIGHSPEED, (unsigned short) isr_HIGHSPEED);
+
+  USBIE = bmSUDAV | bmURES | bmHSGRANT;
+}
+
+// On the FX2 the only plausible endpoints are 0, 1, 2, 4, 6, 8
+// This doesn't check to see that they're enabled
+
+unsigned char
+plausible_endpoint (unsigned char ep)
+{
+  ep &= ~0x80;	// ignore direction bit
+
+  if (ep > 8)
+    return 0;
+
+  if (ep == 1)
+    return 1;
+
+  return (ep & 0x1) == 0;	// must be even
+}
+
+// return pointer to control and status register for endpoint.
+// only called with plausible_endpoints
+
+xdata volatile unsigned char *
+epcs (unsigned char ep)
+{
+  if (ep == 0x01)		// ep1 has different in and out CS regs
+    return EP1OUTCS;
+
+  if (ep == 0x81)
+    return EP1INCS;
+
+  ep &= ~0x80;			// ignore direction bit
+
+  if (ep == 0x00)		// ep0
+    return EP0CS;
+
+  return EP2CS + (ep >> 1);	// 2, 4, 6, 8 are consecutive
+}
+
+void
+usb_handle_setup_packet (void)
+{
+  _usb_got_SUDAV = 0;
+
+  // handle the standard requests...
+
+  switch (bRequestType & bmRT_TYPE_MASK){
+
+  case bmRT_TYPE_CLASS:
+  case bmRT_TYPE_RESERVED:
+    fx2_stall_ep0 ();		// we don't handle these.  indicate error
+    break;
+    
+  case bmRT_TYPE_VENDOR:
+    // call the application code.
+    // If it handles the command it returns non-zero
+
+    if (!app_vendor_cmd ())	
+      fx2_stall_ep0 ();
+    break;
+
+  case bmRT_TYPE_STD:
+    // these are the standard requests...
+
+    if ((bRequestType & bmRT_DIR_MASK) == bmRT_DIR_IN){
+
+      ////////////////////////////////////
+      //    handle the IN requests
+      ////////////////////////////////////
+
+      switch (bRequest){
+
+      case RQ_GET_CONFIG:
+	EP0BUF[0] = _usb_config;	// FIXME app should handle
+	EP0BCH = 0;
+	EP0BCL = 1;
+	break;
+	
+      // --------------------------------
+
+      case RQ_GET_INTERFACE:
+	EP0BUF[0] = _usb_alt_setting;	// FIXME app should handle
+	EP0BCH = 0;
+	EP0BCL = 1;
+	break;
+
+      // --------------------------------
+
+      case RQ_GET_DESCR:
+	switch (wValueH){
+
+	case DT_DEVICE:
+	  SUDPTRH = MSB (current_device_descr);
+	  SUDPTRL = LSB (current_device_descr);
+	  break;
+	  
+	case DT_DEVQUAL:
+	  SUDPTRH = MSB (current_devqual_descr);
+	  SUDPTRL = LSB (current_devqual_descr);
+	  break;
+
+	case DT_CONFIG:
+	  if (0 && wValueL != 1)	// FIXME only a single configuration
+	    fx2_stall_ep0 ();
+	  else {
+	    SUDPTRH = MSB (current_config_descr);
+	    SUDPTRL = LSB (current_config_descr);
+	  }
+	  break;
+
+	case DT_OTHER_SPEED:
+	  if (0 && wValueL != 1)	// FIXME only a single configuration
+	    fx2_stall_ep0 ();
+	  else {
+	    SUDPTRH = MSB (other_config_descr);
+	    SUDPTRL = LSB (other_config_descr);
+	  }
+	  break;
+
+	case DT_STRING:
+	  if (wValueL >= nstring_descriptors)
+	    fx2_stall_ep0 ();
+	  else {
+	    xdata char *p = string_descriptors[wValueL];
+	    SUDPTRH = MSB (p);
+	    SUDPTRL = LSB (p);
+	  }
+	  break;
+
+	default:
+	  fx2_stall_ep0 ();	// invalid request
+	  break;
+	}
+	break;
+	
+      // --------------------------------
+
+      case RQ_GET_STATUS:
+	switch (bRequestType & bmRT_RECIP_MASK){
+	case bmRT_RECIP_DEVICE:
+	  EP0BUF[0] = bmGSDA_SELF_POWERED;	// FIXME app should handle
+	  EP0BUF[1] = 0;
+	  EP0BCH = 0;
+	  EP0BCL = 2;
+	  break;
+
+	case bmRT_RECIP_INTERFACE:
+	  EP0BUF[0] = 0;
+	  EP0BUF[1] = 0;
+	  EP0BCH = 0;
+	  EP0BCL = 2;
+	  break;
+
+	case bmRT_RECIP_ENDPOINT:
+	  if (plausible_endpoint (wIndexL)){
+	    EP0BUF[0] = *epcs (wIndexL) & bmEPSTALL;
+	    EP0BUF[1] = 0;
+	    EP0BCH = 0;
+	    EP0BCL = 2;
+	  }
+	  else
+	    fx2_stall_ep0 ();
+	  break;
+
+	default:
+	  fx2_stall_ep0 ();
+	  break;
+	}
+	break;
+
+      // --------------------------------
+
+      case RQ_SYNCH_FRAME:	// not implemented
+      default:
+	fx2_stall_ep0 ();
+	break;
+      }
+    }
+
+    else {
+
+      ////////////////////////////////////
+      //    handle the OUT requests
+      ////////////////////////////////////
+
+      switch (bRequest){
+
+      case RQ_SET_CONFIG:
+	_usb_config = wValueL;		// FIXME app should handle
+	break;
+
+      case RQ_SET_INTERFACE:
+	_usb_alt_setting = wValueL;	// FIXME app should handle
+	break;
+
+      // --------------------------------
+
+      case RQ_CLEAR_FEATURE:
+	switch (bRequestType & bmRT_RECIP_MASK){
+
+	case bmRT_RECIP_DEVICE:
+	  switch (wValueL){
+	  case FS_DEV_REMOTE_WAKEUP:
+	  default:
+	    fx2_stall_ep0 ();
+	  }
+	  break;
+
+	case bmRT_RECIP_ENDPOINT:
+	  if (wValueL == FS_ENDPOINT_HALT && plausible_endpoint (wIndexL)){
+	    *epcs (wIndexL) &= ~bmEPSTALL;
+	    fx2_reset_data_toggle (wIndexL);
+	  }
+	  else
+	    fx2_stall_ep0 ();
+	  break;
+
+	default:
+	  fx2_stall_ep0 ();
+	  break;
+	}
+	break;
+
+      // --------------------------------
+
+      case RQ_SET_FEATURE:
+	switch (bRequestType & bmRT_RECIP_MASK){
+
+	case bmRT_RECIP_DEVICE:
+	  switch (wValueL){
+	  case FS_TEST_MODE:
+	    // hardware handles this after we complete SETUP phase handshake
+	    break;
+
+	  case FS_DEV_REMOTE_WAKEUP:
+	  default:
+	    fx2_stall_ep0 ();
+	    break;
+	  }
+	}
+	break;
+
+      case bmRT_RECIP_ENDPOINT:
+	switch (wValueL){
+	case FS_ENDPOINT_HALT:
+	  if (plausible_endpoint (wIndexL))
+	    *epcs (wIndexL) |= bmEPSTALL;
+	  else
+	    fx2_stall_ep0 ();
+	  break;
+
+	default:
+	  fx2_stall_ep0 ();
+	  break;
+	}
+	break;
+
+      // --------------------------------
+
+      case RQ_SET_ADDRESS:	// handled by fx2 hardware
+      case RQ_SET_DESCR:	// not implemented
+      default:
+	fx2_stall_ep0 ();
+      }
+
+    }
+    break;
+
+  }	// bmRT_TYPE_MASK
+
+  // ack handshake phase of device request
+  EP0CS |= bmHSNAK;
+}
diff --git a/firmware/fx2/src/.gitignore b/firmware/fx2/src/.gitignore
new file mode 100644
index 000000000..d46c52c00
--- /dev/null
+++ b/firmware/fx2/src/.gitignore
@@ -0,0 +1,17 @@
+/*.ihx
+/*.lnk
+/*.lst
+/*.map
+/*.mem
+/*.rel
+/*.rst
+/*.sym
+/blink_leds.asm
+/usrp_common.asm
+/command_loop.asm
+/fpga.asm
+/*.asm
+/usrp_gpif.c
+/usrp_gpif_inline.h
+/Makefile
+/Makefile.in
diff --git a/firmware/fx2/src/Makefile.am b/firmware/fx2/src/Makefile.am
new file mode 100644
index 000000000..5dcff2c85
--- /dev/null
+++ b/firmware/fx2/src/Makefile.am
@@ -0,0 +1,22 @@
+#
+# Copyright 2004 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+SUBDIRS = common usrp1
diff --git a/firmware/fx2/src/common/.gitignore b/firmware/fx2/src/common/.gitignore
new file mode 100644
index 000000000..d46c52c00
--- /dev/null
+++ b/firmware/fx2/src/common/.gitignore
@@ -0,0 +1,17 @@
+/*.ihx
+/*.lnk
+/*.lst
+/*.map
+/*.mem
+/*.rel
+/*.rst
+/*.sym
+/blink_leds.asm
+/usrp_common.asm
+/command_loop.asm
+/fpga.asm
+/*.asm
+/usrp_gpif.c
+/usrp_gpif_inline.h
+/Makefile
+/Makefile.in
diff --git a/firmware/fx2/src/common/Makefile.am b/firmware/fx2/src/common/Makefile.am
new file mode 100644
index 000000000..95232324d
--- /dev/null
+++ b/firmware/fx2/src/common/Makefile.am
@@ -0,0 +1,50 @@
+#
+# Copyright 2004 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+EXTRA_DIST = 			\
+	_startup.a51		\
+	blink_leds.c		\
+	check_mdelay.c		\
+	check_udelay.c		\
+	edit-gpif		\
+	fpga.h			\
+	fpga_load.h		\
+	fpga_load.c		\
+	gpif.c			\
+	gpif.gpf		\
+	init_gpif.c		\
+	usrp_common.c		\
+	usrp_globals.h		\
+	vectors.a51		\
+	build_eeprom.py		
+
+all: usrp_gpif.c
+
+usrp_gpif.c usrp_gpif_inline.h : gpif.c
+	srcdir=$(srcdir) $(PYTHON) $(srcdir)/edit-gpif $(srcdir)/gpif.c usrp_gpif.c usrp_gpif_inline.h
+
+CLEANFILES = \
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib \
+	usrp_gpif.c usrp_gpif_inline.h
+
+DISTCLEANFILES = \
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib \
+	usrp_gpif.c usrp_gpif_inline.h 
diff --git a/firmware/fx2/src/common/_startup.a51 b/firmware/fx2/src/common/_startup.a51
new file mode 100644
index 000000000..30a907857
--- /dev/null
+++ b/firmware/fx2/src/common/_startup.a51
@@ -0,0 +1,80 @@
+;;; -*- asm -*-
+;;;
+;;; Copyright 2003,2004 Free Software Foundation, Inc.
+;;; 
+;;; This file is part of GNU Radio
+;;; 
+;;; GNU Radio is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3, or (at your option)
+;;; any later version.
+;;; 
+;;; GNU Radio is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;; 
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Radio; see the file COPYING.  If not, write to
+;;; the Free Software Foundation, Inc., 51 Franklin Street,
+;;; Boston, MA 02110-1301, USA.
+
+    
+;;; The default external memory initialization provided by sdcc is not
+;;; appropriate to the FX2.  This is derived from the sdcc code, but uses 
+;;; the FX2 specific _MPAGE sfr.
+
+
+	;; .area XISEG   (XDATA)  ; the initialized external data area
+	;; .area XINIT   (CODE)	  ; the code space consts to init XISEG
+	.area XSEG    (XDATA)	  ; zero initialized xdata
+	.area USBDESCSEG (XDATA)  ; usb descriptors
+
+	
+	.area CSEG    (CODE)
+
+	;; sfr that sets upper address byte of MOVX using @r0 or @r1
+	_MPAGE	=	0x0092
+
+__sdcc_external_startup::
+	;; This system is now compiled with the --no-xinit-opt 
+	;; which means that any initialized XDATA is handled
+	;; inline by code in the GSINIT segs emitted for each file.
+	;; 
+	;; We zero XSEG and all of the internal ram to ensure 
+	;; a known good state for uninitialized variables.
+
+;	_mcs51_genRAMCLEAR() start
+	mov	r0,#l_XSEG
+	mov	a,r0
+	orl	a,#(l_XSEG >> 8)
+	jz	00002$
+	mov	r1,#((l_XSEG + 255) >> 8)
+	mov	dptr,#s_XSEG
+	clr     a
+	
+00001$:	movx	@dptr,a
+	inc	dptr
+	djnz	r0,00001$
+	djnz	r1,00001$
+	
+	;; We're about to clear internal memory.  This will overwrite
+	;; the stack which contains our return address.
+	;; Pop our return address into DPH, DPL
+00002$:	pop	dph
+	pop	dpl
+	
+	;; R0 and A contain 0.  This loop will execute 256 times.
+	;; 
+	;; FWIW the first iteration writes direct address 0x00,
+	;; which is the location of r0.  We get lucky, we're 
+	;; writing the correct value (0)
+	
+00003$:	mov	@r0,a
+	djnz	r0,00003$
+
+	push	dpl		; restore our return address
+	push	dph
+
+	mov	dpl,#0		; indicate that data init is still required
+	ret
diff --git a/firmware/fx2/src/common/_startup.a51.brittle b/firmware/fx2/src/common/_startup.a51.brittle
new file mode 100644
index 000000000..2996275cf
--- /dev/null
+++ b/firmware/fx2/src/common/_startup.a51.brittle
@@ -0,0 +1,78 @@
+;;; -*- asm -*-
+;;;
+;;; Copyright 2003 Free Software Foundation, Inc.
+;;; 
+;;; This file is part of GNU Radio
+;;; 
+;;; GNU Radio is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3, or (at your option)
+;;; any later version.
+;;; 
+;;; GNU Radio is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;; 
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Radio; see the file COPYING.  If not, write to
+;;; the Free Software Foundation, Inc., 51 Franklin Street,
+;;; Boston, MA 02110-1301, USA.
+
+    
+;;; The default external memory initialization provided by sdcc is not
+;;; appropriate to the FX2.  This is derived from the sdcc code, but uses 
+;;; the FX2 specific _MPAGE sfr.
+
+
+	.area XISEG   (XDATA)	; the initialized external data area
+	.area XINIT   (CODE)	; the code space consts to init XISEG
+	.area XSEG    (XDATA)	; zero initialized xdata
+	.area USBDESCSEG (XDATA); usb descriptors
+
+	
+	;; BIG TIME KLUDGE!
+	;; Look at usrp_main.rst and count the bytes from our
+	;; "normal return location" to the first instruction following
+	;; the comment:	"_mcs51_getRAMCLEAR () start"
+	
+	INSTRUCTION_BYTES_TO_SKIP = 0x29	 ; valid for sdcc 2.4.0 
+	
+
+	.area CSEG    (CODE)
+
+	;; sfr that sets upper address byte of MOVX using @r0 or @r1
+	_MPAGE	=	0x0092
+
+__sdcc_external_startup::
+;	_mcs51_genXINIT() start
+	mov	r1,#l_XINIT
+	mov	a,r1
+	orl	a,#(l_XINIT >> 8)
+	jz	00003$
+	mov	r2,#((l_XINIT+255) >> 8)
+	mov	dptr,#s_XINIT
+	mov	r0,#s_XISEG
+	mov	_MPAGE,#(s_XISEG >> 8)
+00001$:	clr	a
+	movc	a,@a+dptr
+	movx	@r0,a
+	inc	dptr
+	inc	r0
+	cjne	r0,#0,00002$
+	inc	_MPAGE
+00002$:	djnz	r1,00001$
+	djnz	r2,00001$
+	mov	_MPAGE,#0xFF
+00003$:
+
+	;; Danger! Total KLUDGE!
+	;; We pop the return address, add a magic number to it
+	;; then jump to that address.  Believe it or not, this
+	;; looks like the least kludgy way to handle this,
+	;; short of patching the compiler...
+
+	pop	dph
+	pop	dpl
+	mov	a,#INSTRUCTION_BYTES_TO_SKIP
+	jmp	@a+dptr
diff --git a/firmware/fx2/src/common/blink_leds.c b/firmware/fx2/src/common/blink_leds.c
new file mode 100644
index 000000000..255c69733
--- /dev/null
+++ b/firmware/fx2/src/common/blink_leds.c
@@ -0,0 +1,36 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+
+void
+main (void)
+{
+  unsigned short	counter = 0;
+
+  init_usrp ();
+
+  while (1){
+    unsigned char counter_high = counter >> 8;
+    set_led_0 (counter_high & 0x40);
+    set_led_1 (counter_high & 0x80);
+    counter++;
+  }
+}
diff --git a/firmware/fx2/src/common/build_eeprom.py b/firmware/fx2/src/common/build_eeprom.py
new file mode 100755
index 000000000..ae62587db
--- /dev/null
+++ b/firmware/fx2/src/common/build_eeprom.py
@@ -0,0 +1,107 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+import re
+import sys
+import os, os.path
+from optparse import OptionParser
+
+# USB Vendor and Product ID's
+
+VID = 0xfffe                            # Free Software Folks
+PID = 0x0002                            # Universal Software Radio Peripheral
+    
+def msb (x):
+    return (x >> 8) & 0xff
+
+def lsb (x):
+    return x & 0xff
+
+def build_eeprom_image (filename, rev):
+    """Build a ``C2 Load'' EEPROM image.
+
+    For details on this format, see section 3.4.3 of
+    the EZ-USB FX2 Technical Reference Manual
+    """
+    # get the code we want to run
+    f = open(filename, 'rb')
+    bytes = f.read()
+
+    devid = rev
+    start_addr = 0 #prove me wrong
+
+    rom_header = [
+        0xC2,                           # boot from EEPROM
+        lsb (VID),
+        msb (VID),
+        lsb (PID),
+        msb (PID),
+        lsb (devid),
+        msb (devid),
+        0                               # configuration byte
+        ]
+    
+    # 4 byte header that indicates where to load
+    # the immediately follow code bytes.
+    code_header = [
+        msb (len (bytes)),
+        lsb (len (bytes)),
+        msb (start_addr),
+        lsb (start_addr)
+        ]
+
+    # writes 0 to CPUCS reg (brings FX2 out of reset)
+    trailer = [
+        0x80,
+        0x01,
+        0xe6,
+        0x00,
+        0x00
+        ]
+
+    image = rom_header + code_header + [ord(c) for c in bytes] + trailer
+
+    assert (len (image) <= 256)
+    return image 
+
+if __name__ == '__main__':
+    usage = "usage: %prog -r REV [options] bootfile.bin outfile.bin"
+    parser = OptionParser (usage=usage)
+    parser.add_option ("-r", "--rev", type="int", default=-1,
+                       help="Specify USRP revision number REV (2 or 4)")
+    (options, args) = parser.parse_args ()
+    if len (args) != 2:
+        parser.print_help ()
+        sys.exit (1)
+    if options.rev < 0:
+        sys.stderr.write (
+            "You must specify the USRP revision number (2 or 4) with -r REV\n")
+        sys.exit (1)
+
+    infile = args[0]
+    outfile = args[1]
+
+    image = "".join(chr(c) for c in build_eeprom_image(infile, options.rev))
+
+    f = open(outfile, 'wb')
+    f.write(str(image))
+    f.close()  
diff --git a/firmware/fx2/src/common/check_mdelay.c b/firmware/fx2/src/common/check_mdelay.c
new file mode 100644
index 000000000..de1af47f6
--- /dev/null
+++ b/firmware/fx2/src/common/check_mdelay.c
@@ -0,0 +1,37 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+#include "delay.h"
+
+void
+main (void)
+{
+  init_usrp ();
+
+  // CPUCS = 0;		// 12 MHz
+  // CPUCS = bmCLKSPD0;	// 24 MHz
+  CPUCS = bmCLKSPD1;	// 48 MHz
+  
+  while (1){
+    USRP_LED_REG ^= bmLED0;
+    mdelay (10);
+  }
+}
diff --git a/firmware/fx2/src/common/check_udelay.c b/firmware/fx2/src/common/check_udelay.c
new file mode 100644
index 000000000..46885a067
--- /dev/null
+++ b/firmware/fx2/src/common/check_udelay.c
@@ -0,0 +1,37 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+#include "delay.h"
+
+void
+main (void)
+{
+  init_usrp ();
+
+  // CPUCS = 0;		// 12 MHz
+  // CPUCS = bmCLKSPD0;	// 24 MHz
+  CPUCS = bmCLKSPD1;	// 48 MHz
+  
+  while (1){
+    USRP_LED_REG ^= bmLED0;
+    udelay (250);
+  }
+}
diff --git a/firmware/fx2/src/common/edit-gpif b/firmware/fx2/src/common/edit-gpif
new file mode 100755
index 000000000..5367b75a5
--- /dev/null
+++ b/firmware/fx2/src/common/edit-gpif
@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+# -*- Python -*-
+#
+# Copyright 2003 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+
+# Edit the gpif.c file generated by the Cypress GPIF Designer Tool and
+# produce usrp_gpif.c, and usrp_gpif_inline.h, files suitable for our
+# uses.
+
+import re
+import string
+import sys
+
+def check_flow_state (line, flow_state_dict):
+    mo = re.match (r'/\* Wave (\d) FlowStates \*/ (.*),', line)
+    if mo:
+        wave = int (mo.group (1))
+        data = mo.group (2)
+        split = data.split (',', 8)
+        v = map (lambda x : int (x, 16), split)
+        # print "%s, %s" % (wave, data)
+        # print "split: ", split
+        # print "v    : ", v
+        flow_state_dict[wave] = v
+
+
+def delta (xseq, yseq):
+    # set subtraction
+    z = []
+    for x in xseq:
+        if x not in yseq:
+            z.append (x)
+    return z
+    
+
+def write_define (output, name, pairs):
+    output.write ('#define %s()\t\\\n' % name)
+    output.write ('do {\t\t\t\t\t\\\n')
+    for reg, val in pairs:
+        output.write ('%14s = 0x%02x;\t\t\t\\\n' % (reg, val))
+    output.write ('} while (0)\n\n')
+    
+def write_inlines (output, dict):
+    regs = ['FLOWSTATE', 'FLOWLOGIC', 'FLOWEQ0CTL', 'FLOWEQ1CTL', 'FLOWHOLDOFF',
+            'FLOWSTB', 'FLOWSTBEDGE', 'FLOWSTBHPERIOD', 'GPIFHOLDAMOUNT']
+
+    READ_FLOW_STATE = 2
+    WRITE_FLOW_STATE = 3
+
+    read_info = zip (regs, dict[READ_FLOW_STATE])
+    write_info = zip (regs, dict[WRITE_FLOW_STATE])
+    
+    output.write ('''/*
+ * Machine generated by "edit-gpif".  Do not edit by hand.
+ */
+
+''')
+    write_define (output, 'setup_flowstate_common', read_info)
+    write_define (output, 'setup_flowstate_read', delta (read_info, write_info))
+    write_define (output, 'setup_flowstate_write', delta (write_info, read_info))
+    
+
+def edit_gpif (input_name, output_name, inline_name):
+    input = open (input_name, 'r')
+    output = open (output_name, 'w')
+    inline = open (inline_name, 'w')
+    flow_state_dict = {}
+
+    output.write ('''/*
+ * Machine generated by "edit-gpif".  Do not edit by hand.
+ */
+
+''')
+    
+    while 1:
+        line = input.readline ()
+        line = string.replace (line, '\r','')
+        line = re.sub (r' *$', r'', line)
+
+        check_flow_state (line, flow_state_dict)
+
+        line = re.sub (r'#include', r'// #include', line)
+        line = re.sub (r'xdata ', r'', line)
+        if re.search (r'GpifInit', line):
+            break
+        
+        output.write (line)
+
+    output.close ()
+    write_inlines (inline, flow_state_dict)
+    inline.close ()
+
+
+# gpif.c usrp_gpif.c usrp_gpif_inline.h
+edit_gpif (sys.argv[1], sys.argv[2], sys.argv[3])
diff --git a/firmware/fx2/src/common/fpga.h b/firmware/fx2/src/common/fpga.h
new file mode 100644
index 000000000..6cd5de8e2
--- /dev/null
+++ b/firmware/fx2/src/common/fpga.h
@@ -0,0 +1,31 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDED_FPGA_H
+#define INCLUDED_FPGA_H
+
+#include "fpga_load.h"
+
+#if defined(HAVE_USRP2)
+#include "fpga_rev2.h"
+#endif
+
+#endif /* INCLUDED_FPGA_H */
diff --git a/firmware/fx2/src/common/fpga_load.c b/firmware/fx2/src/common/fpga_load.c
new file mode 100644
index 000000000..c3ae9e707
--- /dev/null
+++ b/firmware/fx2/src/common/fpga_load.c
@@ -0,0 +1,193 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+#include "fpga_load.h"
+#include "delay.h"
+
+/*
+ * setup altera FPGA serial load (PS).
+ *
+ * On entry:
+ *	don't care
+ *
+ * On exit:
+ *	ALTERA_DCLK    = 0
+ *	ALTERA_NCONFIG = 1
+ *	ALTERA_NSTATUS = 1 (input)
+ */
+unsigned char
+fpga_load_begin (void)
+{
+  USRP_ALTERA_CONFIG &= ~bmALTERA_BITS;		// clear all bits (NCONFIG low)
+  udelay (40);					// wait 40 us
+  USRP_ALTERA_CONFIG |= bmALTERA_NCONFIG;	// set NCONFIG high
+
+  if (UC_BOARD_HAS_FPGA){
+    // FIXME should really cap this loop with a counter so we
+    //   don't hang forever on a hardware failure.
+    while ((USRP_ALTERA_CONFIG & bmALTERA_NSTATUS) == 0) // wait for NSTATUS to go high
+      ;
+  }
+
+  // ready to xfer now
+
+  return 1;
+}
+
+/*
+ * clock out the low bit of bits.
+ *
+ * On entry:
+ *	ALTERA_DCLK    = 0
+ *	ALTERA_NCONFIG = 1
+ *	ALTERA_NSTATUS = 1 (input)
+ *
+ * On exit:
+ *	ALTERA_DCLK    = 0
+ *	ALTERA_NCONFIG = 1
+ *	ALTERA_NSTATUS = 1 (input)
+ */
+
+
+#if 0
+
+static void
+clock_out_config_byte (unsigned char bits)
+{
+  unsigned char i;
+
+  // clock out configuration byte, least significant bit first
+
+  for (i = 0; i < 8; i++){
+
+    USRP_ALTERA_CONFIG = ((USRP_ALTERA_CONFIG & ~bmALTERA_DATA0) | ((bits & 1) ? bmALTERA_DATA0 : 0));
+    USRP_ALTERA_CONFIG |= bmALTERA_DCLK;		/* set DCLK to 1 */
+    USRP_ALTERA_CONFIG &= ~bmALTERA_DCLK;		/* set DCLK to 0 */
+
+    bits = bits >> 1;
+  }
+}
+	
+#else
+
+static void 
+clock_out_config_byte (unsigned char bits) _naked
+{
+    _asm
+	mov	a, dpl
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	rrc	a
+	mov	_bitALTERA_DATA0,c
+	setb	_bitALTERA_DCLK
+	clr	_bitALTERA_DCLK
+	
+	ret	
+
+    _endasm;
+}
+
+#endif
+
+static void
+clock_out_bytes (unsigned char bytecount,
+		 unsigned char xdata *p)
+{
+  while (bytecount-- > 0)
+    clock_out_config_byte (*p++);
+}
+
+/*
+ * Transfer block of bytes from packet to FPGA serial configuration port
+ *
+ * On entry:
+ *	ALTERA_DCLK    = 0
+ *	ALTERA_NCONFIG = 1
+ *	ALTERA_NSTATUS = 1 (input)
+ *
+ * On exit:
+ *	ALTERA_DCLK    = 0
+ *	ALTERA_NCONFIG = 1
+ *	ALTERA_NSTATUS = 1 (input)
+ */
+unsigned char
+fpga_load_xfer (xdata unsigned char *p, unsigned char bytecount)
+{
+  clock_out_bytes (bytecount, p);
+  return 1;
+}
+
+/*
+ * check for successful load...
+ */
+unsigned char
+fpga_load_end (void)
+{
+  unsigned char status = USRP_ALTERA_CONFIG;
+
+  if (!UC_BOARD_HAS_FPGA)			// always true if we don't have FPGA
+    return 1;
+
+  if ((status & bmALTERA_NSTATUS) == 0)		// failed to program
+    return 0;
+
+  if ((status & bmALTERA_CONF_DONE) == bmALTERA_CONF_DONE)
+    return 1;					// everything's cool
+
+  // I don't think this should happen.  It indicates that
+  // programming is still in progress.
+
+  return 0;
+}
diff --git a/firmware/fx2/src/common/fpga_load.h b/firmware/fx2/src/common/fpga_load.h
new file mode 100644
index 000000000..7c36a04c8
--- /dev/null
+++ b/firmware/fx2/src/common/fpga_load.h
@@ -0,0 +1,28 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#ifndef INCLUDED_FPGA_LOAD_H
+#define INCLUDED_FPGA_LOAD_H
+
+unsigned char fpga_load_begin (void);
+unsigned char fpga_load_xfer (xdata unsigned char *p, unsigned char len);
+unsigned char fpga_load_end (void);
+
+#endif /* INCLUDED_FPGA_LOAD_H */
diff --git a/firmware/fx2/src/common/gpif.c b/firmware/fx2/src/common/gpif.c
new file mode 100755
index 000000000..489e6e81a
--- /dev/null
+++ b/firmware/fx2/src/common/gpif.c
@@ -0,0 +1,292 @@
+// This program configures the General Programmable Interface (GPIF) for FX2.     
+// Please do not modify sections of text which are marked as "DO NOT EDIT ...". 
+//                                                                                
+// DO NOT EDIT ...                  
+// GPIF Initialization              
+// Interface Timing      Async        
+// Internal Ready Init   IntRdy=1     
+// CTL Out Tristate-able Binary       
+// SingleWrite WF Select     1     
+// SingleRead WF Select      0     
+// FifoWrite WF Select       3     
+// FifoRead WF Select        2     
+// Data Bus Idle Drive   Tristate     
+// END DO NOT EDIT                  
+                                    
+// DO NOT EDIT ...       
+// GPIF Wave Names       
+// Wave 0   = singlerd     
+// Wave 1   = singlewr     
+// Wave 2   = FIFORd       
+// Wave 3   = FIFOWr       
+                         
+// GPIF Ctrl Outputs   Level   
+// CTL 0    = WEN#     CMOS        
+// CTL 1    = REN#     CMOS        
+// CTL 2    = OE#      CMOS        
+// CTL 3    = CLRST    CMOS        
+// CTL 4    = unused   CMOS        
+// CTL 5    = BOGUS    CMOS        
+                               
+// GPIF Rdy Inputs         
+// RDY0     = EF#            
+// RDY1     = FF#            
+// RDY2     = unused         
+// RDY3     = unused         
+// RDY4     = unused         
+// RDY5     = TCXpire        
+// FIFOFlag = FIFOFlag       
+// IntReady = IntReady       
+// END DO NOT EDIT         
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 0: singlerd                                                                
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   NO Data   NO Data   NO Data   NO Data   NO Data   NO Data            
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    Wait 1    Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A                                                                                
+//   LFunc                                                                                 
+//   Term B                                                                                
+// Branch1                                                                                 
+// Branch0                                                                                 
+// Re-Exec                                                                                 
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 1: singlewr                                                                
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode Activate  Activate  Activate  Activate  Activate  Activate  Activate           
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A           EF#                                                                  
+//   LFunc            AND                                                                  
+//   Term B           EF#                                                                  
+// Branch1            ThenIdle                                                             
+// Branch0            ElseIdle                                                             
+// Re-Exec            No                                                                   
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         1         1         1         1         1         1         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 2: FIFORd                                                                  
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   Activate  NO Data   NO Data   NO Data   NO Data   NO Data            
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    IF        Wait 1    Wait 1    Wait 1             
+//   Term A           TCXpire             TCXpire                                          
+//   LFunc            AND                 AND                                              
+//   Term B           TCXpire             TCXpire                                          
+// Branch1            Then 2              ThenIdle                                         
+// Branch0            Else 1              ElseIdle                                         
+// Re-Exec            No                  No                                               
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          1         1         1         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 3: FIFOWr                                                                  
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   Activate  Activate  Activate  Activate  Activate  Activate           
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A           TCXpire                                                              
+//   LFunc            AND                                                                  
+//   Term B           TCXpire                                                              
+// Branch1            ThenIdle                                                             
+// Branch0            Else 1                                                               
+// Re-Exec            No                                                                   
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+                                              
+// GPIF Program Code                          
+                                              
+// DO NOT EDIT ...                            
+#include "fx2.h"                            
+#include "fx2regs.h"                        
+#include "fx2sdly.h"     // SYNCDELAY macro 
+// END DO NOT EDIT                            
+                                              
+// DO NOT EDIT ...                     
+const char xdata WaveData[128] =     
+{                                      
+// Wave 0 
+/* LenBr */ 0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+// Wave 1 
+/* LenBr */ 0x01,     0x3F,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x22,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
+/* Output*/ 0x00,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x00,
+/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+// Wave 2 
+/* LenBr */ 0x01,     0x11,     0x01,     0x3F,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x03,     0x00,     0x01,     0x00,     0x00,     0x00,     0x00,
+/* Output*/ 0x04,     0x04,     0x04,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x2D,     0x00,     0x2D,     0x00,     0x00,     0x00,     0x3F,
+// Wave 3 
+/* LenBr */ 0x01,     0x39,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
+/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x2D,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+};                     
+// END DO NOT EDIT     
+                       
+// DO NOT EDIT ...                     
+const char xdata FlowStates[36] =   
+{                                      
+/* Wave 0 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+/* Wave 1 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+/* Wave 2 FlowStates */ 0x81,0x2D,0x26,0x00,0x04,0x04,0x03,0x02,0x00,
+/* Wave 3 FlowStates */ 0x81,0x2D,0x21,0x00,0x04,0x04,0x03,0x02,0x00,
+};                     
+// END DO NOT EDIT     
+                       
+// DO NOT EDIT ...                                               
+const char xdata InitData[7] =                                   
+{                                                                
+/* Regs  */ 0xA0,0x00,0x00,0x00,0xEE,0x4E,0x00     
+};                                                               
+// END DO NOT EDIT                                               
+                                                                 
+// TO DO: You may add additional code below.
+
+void GpifInit( void )
+{
+  BYTE i;
+ 
+  // Registers which require a synchronization delay, see section 15.14
+  // FIFORESET        FIFOPINPOLAR
+  // INPKTEND         OUTPKTEND
+  // EPxBCH:L         REVCTL
+  // GPIFTCB3         GPIFTCB2
+  // GPIFTCB1         GPIFTCB0
+  // EPxFIFOPFH:L     EPxAUTOINLENH:L
+  // EPxFIFOCFG       EPxGPIFFLGSEL
+  // PINFLAGSxx       EPxFIFOIRQ
+  // EPxFIFOIE        GPIFIRQ
+  // GPIFIE           GPIFADRH:L
+  // UDMACRCH:L       EPxGPIFTRIG
+  // GPIFTRIG
+  
+  // Note: The pre-REVE EPxGPIFTCH/L register are affected, as well...
+  //      ...these have been replaced by GPIFTC[B3:B0] registers
+ 
+  // 8051 doesn't have access to waveform memories 'til
+  // the part is in GPIF mode.
+ 
+  IFCONFIG = 0xEE;
+  // IFCLKSRC=1   , FIFOs executes on internal clk source
+  // xMHz=1       , 48MHz internal clk rate
+  // IFCLKOE=0    , Don't drive IFCLK pin signal at 48MHz
+  // IFCLKPOL=0   , Don't invert IFCLK pin signal from internal clk
+  // ASYNC=1      , master samples asynchronous
+  // GSTATE=1     , Drive GPIF states out on PORTE[2:0], debug WF
+  // IFCFG[1:0]=10, FX2 in GPIF master mode
+ 
+  GPIFABORT = 0xFF;  // abort any waveforms pending
+ 
+  GPIFREADYCFG = InitData[ 0 ];
+  GPIFCTLCFG = InitData[ 1 ];
+  GPIFIDLECS = InitData[ 2 ];
+  GPIFIDLECTL = InitData[ 3 ];
+  GPIFWFSELECT = InitData[ 5 ];
+  GPIFREADYSTAT = InitData[ 6 ];
+ 
+  // use dual autopointer feature... 
+  AUTOPTRSETUP = 0x07;          // inc both pointers, 
+                                // ...warning: this introduces pdata hole(s)
+                                // ...at E67B (XAUTODAT1) and E67C (XAUTODAT2)
+  
+  // source
+  AUTOPTRH1 = MSB( &WaveData );
+  AUTOPTRL1 = LSB( &WaveData );
+  
+  // destination
+  AUTOPTRH2 = 0xE4;
+  AUTOPTRL2 = 0x00;
+ 
+  // transfer
+  for ( i = 0x00; i < 128; i++ )
+  {
+    EXTAUTODAT2 = EXTAUTODAT1;
+  }
+ 
+// Configure GPIF Address pins, output initial value,
+  PORTCCFG = 0xFF;    // [7:0] as alt. func. GPIFADR[7:0]
+  OEC = 0xFF;         // and as outputs
+  PORTECFG |= 0x80;   // [8] as alt. func. GPIFADR[8]
+  OEE |= 0x80;        // and as output
+ 
+// ...OR... tri-state GPIFADR[8:0] pins
+//  PORTCCFG = 0x00;  // [7:0] as port I/O
+//  OEC = 0x00;       // and as inputs
+//  PORTECFG &= 0x7F; // [8] as port I/O
+//  OEE &= 0x7F;      // and as input
+ 
+// GPIF address pins update when GPIFADRH/L written
+  SYNCDELAY;                    // 
+  GPIFADRH = 0x00;    // bits[7:1] always 0
+  SYNCDELAY;                    // 
+  GPIFADRL = 0x00;    // point to PERIPHERAL address 0x0000
+ 
+// Configure GPIF FlowStates registers for Wave 0 of WaveData
+  FLOWSTATE = FlowStates[ 0 ];
+  FLOWLOGIC = FlowStates[ 1 ];
+  FLOWEQ0CTL = FlowStates[ 2 ];
+  FLOWEQ1CTL = FlowStates[ 3 ];
+  FLOWHOLDOFF = FlowStates[ 4 ];
+  FLOWSTB = FlowStates[ 5 ];
+  FLOWSTBEDGE = FlowStates[ 6 ];
+  FLOWSTBHPERIOD = FlowStates[ 7 ];
+}
+ 
diff --git a/firmware/fx2/src/common/gpif.gpf b/firmware/fx2/src/common/gpif.gpf
new file mode 100755
index 000000000..a954ac193
--- /dev/null
+++ b/firmware/fx2/src/common/gpif.gpf
diff --git a/firmware/fx2/src/common/init_gpif.c b/firmware/fx2/src/common/init_gpif.c
new file mode 100644
index 000000000..edde919be
--- /dev/null
+++ b/firmware/fx2/src/common/init_gpif.c
@@ -0,0 +1,59 @@
+/*
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+
+// These are the tables generated by the Cypress GPIF Designer
+
+extern const char WaveData[128];
+extern const char FlowStates[36];
+extern const char InitData[7];
+
+// The tool is kind of screwed up, in that it doesn't configure some
+// of the ports correctly.  We just use their tables and handle the
+// initialization ourselves.  They also declare that their static
+// initialized data is in xdata, which screws us too.
+
+void
+init_gpif (void)
+{
+  // we've already setup IFCONFIG before calling this...
+
+  GPIFABORT = 0xFF;  // abort any waveforms pending
+  SYNCDELAY;
+ 
+  GPIFREADYCFG = InitData[ 0 ];
+  GPIFCTLCFG = InitData[ 1 ];
+  GPIFIDLECS = InitData[ 2 ];
+  GPIFIDLECTL = InitData[ 3 ];
+  // Hmmm, what's InitData[ 4 ] ...
+  GPIFWFSELECT = InitData[ 5 ];
+  // GPIFREADYSTAT = InitData[ 6 ];	// I think this register is read only...
+ 
+  {
+    BYTE i;
+    
+    for (i = 0; i < 128; i++){
+      GPIF_WAVE_DATA[i] = WaveData[i];
+    }
+  }
+ 
+  FLOWSTATE = 0;		/* ensure it's off */
+}
diff --git a/firmware/fx2/src/common/usrp_common.c b/firmware/fx2/src/common/usrp_common.c
new file mode 100644
index 000000000..0998653c2
--- /dev/null
+++ b/firmware/fx2/src/common/usrp_common.c
@@ -0,0 +1,109 @@
+/*
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+/* 
+ * common code for USRP
+ */
+
+#include "usrp_common.h"
+
+void init_board (void);
+
+void
+init_usrp (void)
+{
+  CPUCS = bmCLKSPD1;	// CPU runs @ 48 MHz
+  CKCON = 0;		// MOVX takes 2 cycles
+
+  // IFCLK is generated internally and runs at 48 MHz; GPIF "master mode"
+
+  IFCONFIG = bmIFCLKSRC | bm3048MHZ | bmIFCLKOE | bmIFCLKPOL | bmIFGPIF;
+  SYNCDELAY;
+
+  // configure IO ports (B and D are used by GPIF)
+
+  IOA = bmPORT_A_INITIAL;	// Port A initial state
+  OEA = bmPORT_A_OUTPUTS;	// Port A direction register
+
+  IOC = bmPORT_C_INITIAL;	// Port C initial state
+  OEC = bmPORT_C_OUTPUTS;	// Port C direction register
+
+  IOE = bmPORT_E_INITIAL;	// Port E initial state
+  OEE = bmPORT_E_OUTPUTS;	// Port E direction register
+
+
+  // REVCTL = bmDYN_OUT | bmENH_PKT;			// highly recommended by docs
+  // SYNCDELAY;
+  
+  // configure end points
+
+  EP1OUTCFG = bmVALID | bmBULK;				SYNCDELAY;
+  EP1INCFG  = bmVALID | bmBULK | bmIN;			SYNCDELAY;
+
+  EP2CFG    = bmVALID | bmBULK | bmQUADBUF;		SYNCDELAY;	// 512 quad bulk OUT
+  EP4CFG    = 0;					SYNCDELAY;	// disabled
+  EP6CFG    = bmVALID | bmBULK | bmQUADBUF | bmIN;	SYNCDELAY;	// 512 quad bulk IN
+  EP8CFG    = 0;					SYNCDELAY;	// disabled
+
+  // reset FIFOs
+
+  FIFORESET = bmNAKALL;					SYNCDELAY;
+  FIFORESET = 2;					SYNCDELAY;
+  // FIFORESET = 4;					SYNCDELAY;
+  FIFORESET = 6;					SYNCDELAY;
+  // FIFORESET = 8;					SYNCDELAY;
+  FIFORESET = 0;					SYNCDELAY;
+  
+  // configure end point FIFOs
+
+  // let core see 0 to 1 transistion of autoout bit
+
+  EP2FIFOCFG =             bmWORDWIDE;			SYNCDELAY;
+  EP2FIFOCFG = bmAUTOOUT | bmWORDWIDE;			SYNCDELAY;
+  EP6FIFOCFG = bmAUTOIN  | bmWORDWIDE;			SYNCDELAY;
+
+
+  // prime the pump 
+
+#if 0
+  EP2BCL  = 0x80;		SYNCDELAY;
+  EP2BCL  = 0x80;		SYNCDELAY;
+  EP2BCL  = 0x80;		SYNCDELAY;
+  EP2BCL  = 0x80;		SYNCDELAY;
+#endif
+
+  EP0BCH = 0;			SYNCDELAY;
+
+  // arm EP1OUT so we can receive "out" packets (TRM pg 8-8)
+
+  EP1OUTBC = 0;			SYNCDELAY;
+
+  EP2GPIFFLGSEL = 0x01;		SYNCDELAY; // For EP2OUT, GPIF uses EF flag
+  EP6GPIFFLGSEL = 0x02;		SYNCDELAY; // For EP6IN,  GPIF uses FF flag
+
+  // set autoin length for EP6
+  // FIXME should be f(enumeration)
+
+  EP6AUTOINLENH = (512) >> 8;	SYNCDELAY;  // this is the length for high speed
+  EP6AUTOINLENL = (512) & 0xff; SYNCDELAY;
+
+  init_board ();
+}
+
diff --git a/firmware/fx2/src/common/usrp_globals.h b/firmware/fx2/src/common/usrp_globals.h
new file mode 100644
index 000000000..445e9e6b4
--- /dev/null
+++ b/firmware/fx2/src/common/usrp_globals.h
@@ -0,0 +1,32 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef _USRP_GLOBALS_H_
+#define _USRP_GLOBALS_H_
+
+extern unsigned char g_tx_enable;
+extern unsigned char g_rx_enable;
+extern unsigned char g_fpga_reset;
+extern unsigned char g_rx_overrun;
+extern unsigned char g_tx_underrun;
+
+
+#endif /* _USRP_GLOBALS_H_ */
diff --git a/firmware/fx2/src/common/vectors.a51 b/firmware/fx2/src/common/vectors.a51
new file mode 100644
index 000000000..e9382ab84
--- /dev/null
+++ b/firmware/fx2/src/common/vectors.a51
@@ -0,0 +1,180 @@
+;;; -*- asm -*-
+;;;
+;;; Copyright 2003 Free Software Foundation, Inc.
+;;; 
+;;; This file is part of GNU Radio
+;;; 
+;;; GNU Radio is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3, or (at your option)
+;;; any later version.
+;;; 
+;;; GNU Radio is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;; 
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Radio; see the file COPYING.  If not, write to
+;;; the Free Software Foundation, Inc., 51 Franklin Street,
+;;; Boston, MA 02110-1301, USA.
+;;; 
+
+;;; Interrupt vectors.
+
+;;; N.B. This object module must come first in the list of modules
+
+	.module vectors
+
+;;; ----------------------------------------------------------------
+;;;		  standard FX2 interrupt vectors
+;;; ----------------------------------------------------------------
+
+	.area CSEG (CODE)
+	.area GSINIT (CODE)
+	.area CSEG (CODE)
+__standard_interrupt_vector::
+__reset_vector::
+	ljmp	s_GSINIT
+	
+	;; 13 8-byte entries.  We point them all at __isr_nop
+	ljmp	__isr_nop	; 3 bytes
+	.ds	5		; + 5 = 8 bytes for vector slot
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+	ljmp	__isr_nop
+	.ds	5
+
+__isr_nop::
+	reti
+
+;;; ----------------------------------------------------------------
+;;; the FIFO/GPIF autovector.  14 4-byte entries.
+;;; must start on a 128 byte boundary.
+;;; ----------------------------------------------------------------
+	
+	. = __reset_vector + 0x0080
+		
+__fifo_gpif_autovector::
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+	ljmp	__isr_nop
+	nop	
+
+	
+;;; ----------------------------------------------------------------
+;;; the USB autovector.  32 4-byte entries.
+;;; must start on a 256 byte boundary.
+;;; ----------------------------------------------------------------
+
+	. = __reset_vector + 0x0100
+	
+__usb_autovector::
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
+	ljmp	__isr_nop
+	nop
diff --git a/firmware/fx2/src/usrp1/.gitignore b/firmware/fx2/src/usrp1/.gitignore
new file mode 100644
index 000000000..54a9e9415
--- /dev/null
+++ b/firmware/fx2/src/usrp1/.gitignore
@@ -0,0 +1,20 @@
+/*.ihx
+/*.lnk
+/*.lst
+/*.map
+/*.mem
+/*.rel
+/*.rst
+/*.sym
+/blink_leds.asm
+/usrp_common.asm
+/command_loop.asm
+/fpga.asm
+/*.asm
+/Makefile
+/Makefile.in
+/usrp_gpif.c
+/usrp_gpif_inline.h
+/Makefile.in
+/burn-usrp2-eeprom
+/burn-usrp4-eeprom
diff --git a/firmware/fx2/src/usrp1/Makefile.am b/firmware/fx2/src/usrp1/Makefile.am
new file mode 100644
index 000000000..a964f9198
--- /dev/null
+++ b/firmware/fx2/src/usrp1/Makefile.am
@@ -0,0 +1,141 @@
+#
+# Copyright 2003,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+#firmwaredir = $(prefix)/share/uhd/images
+#firmware_DATA = usrp1_fw.ihx
+
+#eepromdir = $(firmwaredir)
+#eepromfile = eeprom_boot.ihx
+#eeprom_DATA = usrp1_eeprom.bin
+
+EXTRA_DIST =			\
+	edit-gpif		\
+	_startup.a51		\
+	blink_leds.c		\
+	board_specific.c	\
+	check_mdelay.c		\
+	check_udelay.c		\
+	eeprom_boot.a51		\
+	eeprom_init.c		\
+	eeprom_io.c		\
+	eeprom_io.h		\
+	fpga_load.c		\
+	fpga_rev2.c		\
+	fpga_rev2.h		\
+	gpif.c			\
+	init_gpif.c		\
+	spi.c			\
+	spi.h			\
+	usb_descriptors.a51	\
+	usrp_common.c		\
+	usrp_common.h		\
+	usrp_gpif.c		\
+	usrp_main.c		\
+	usrp_rev2_regs.h	\
+	vectors.a51		
+
+
+DEFINES=-DHAVE_USRP2
+FW_INCLUDES=-I$(top_srcdir)/include \
+         -I$(top_srcdir)/src/usrp1 \
+	 -I$(top_srcdir)/src/common \
+	 -I$(top_builddir)/src/common
+
+# with EA = 0, the FX2 implements a portion of the 8051 "external memory"
+# on chip.  This memory is mapped like this:
+#
+# The bottom 8K of memory (0x0000 - 0x1fff) is used for both data and
+# code accesses.  There's also 512 bytes for data only from 0xe000 - 0xe1ff.
+#
+# We tell the linker to start the xdata segment at 0x1800, 6K up from
+# the bottom.
+
+MEMOPTS = --code-loc 0x0000 --code-size 0x1800 --xram-loc 0x1800 --xram-size 0x0800 \
+ -Wl '-b USBDESCSEG = 0xE000'
+
+LIBOPTS = -L ../../lib libfx2.lib
+LIBDEP = ../../lib/libfx2.lib
+
+LINKOPTS = $(MEMOPTS) $(LIBOPTS)
+
+EXECUTABLES = 			\
+	std.ihx			\
+	blink_leds.ihx 		\
+	check_mdelay.ihx	\
+	check_udelay.ihx	\
+	eeprom_boot.ihx		
+
+STARTUP = _startup.rel
+
+.c.rel:
+	$(XCC) $(FW_INCLUDES) $(DEFINES) \
+		-c -o $@ `test -f '$<' || echo '$(srcdir)/'`$<
+
+.a51.rel:
+	test -f `basename '$<'` || $(LN_S) '$<' .
+	test -f ../common/`basename '$<'` -o \
+		\! -f `dirname '$<'`/../common/`basename '$<'` \
+		|| $(LN_S) `dirname '$<'`/../common/`basename '$<'` ../common/`basename '$<'`
+	$(XAS) `basename '$<'`
+
+
+EEPROM_BOOT_OBJS = eeprom_boot.rel eeprom_init.rel $(STARTUP)
+
+eeprom_boot.ihx: $(EEPROM_BOOT_OBJS) $(LIBDEP)
+	$(XCC) $(LINKOPTS) -o $@ $(EEPROM_BOOT_OBJS)
+
+usrp1_eeprom.bin: eeprom_boot.bin
+	$(PYTHON) ../common/build_eeprom.py -r4 $< $@
+
+eeprom_boot.bin: eeprom_boot.ihx
+	objcopy -I ihex -O binary $< $@
+
+USRP_OBJS = \
+	vectors.rel 						\
+	usrp_main.rel usrp_common.rel board_specific.rel	\
+	fpga_load.rel fpga_rev2.rel init_gpif.rel usrp_gpif.rel \
+	usb_descriptors.rel spi.rel eeprom_io.rel $(STARTUP)
+
+std.ihx: $(USRP_OBJS) $(LIBDEP)
+	$(XCC) $(LINKOPTS) -o $@ $(USRP_OBJS)
+
+CLEANFILES = 		\
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib	*.bin \
+	usrp_gpif.c usrp_gpif_inline.h
+
+DISTCLEANFILES = 	\
+	*.ihx *.lnk *.lst *.map *.mem *.rel *.rst *.sym *.asm *.lib *.bin
+
+# build gpif stuff
+
+all: usrp_gpif.c std.ihx usrp1_eeprom.bin
+
+usrp_gpif.c usrp_gpif_inline.h : gpif.c
+	srcdir=$(srcdir) $(PYTHON) $(srcdir)/edit-gpif $(srcdir)/gpif.c usrp_gpif.c usrp_gpif_inline.h
+
+# dependencies
+
+usrp_main.rel: usrp_gpif_inline.h
+
+#usrp_main.rel: fpga.h usrp_common.h ../../include/usrp_commands.h usrp_gpif_inline.h  ../../include/usrp_config.h usrp_rev2_regs.h ../../include/fx2regs.h
+#usrp_common.rel: usrp_common.h ../../include/usrp_commands.h ../../include/usrp_config.h usrp_rev2_regs.h ../../include/fx2regs.h
+#fpga.rel: usrp_common.h ../../include/usrp_commands.h fpga.h ../../include/usrp_config.h usrp_rev2_regs.h ../../include/fx2regs.h
+#init_gpif.rel: usrp_common.h ../../include/usrp_config.h usrp_rev2_regs.h ../../include/fx2regs.h
diff --git a/firmware/fx2/src/usrp1/_startup.a51 b/firmware/fx2/src/usrp1/_startup.a51
new file mode 100644
index 000000000..4f5309922
--- /dev/null
+++ b/firmware/fx2/src/usrp1/_startup.a51
@@ -0,0 +1 @@
+	.include "../common/_startup.a51"
diff --git a/firmware/fx2/src/usrp1/blink_leds.c b/firmware/fx2/src/usrp1/blink_leds.c
new file mode 100644
index 000000000..c633d5d48
--- /dev/null
+++ b/firmware/fx2/src/usrp1/blink_leds.c
@@ -0,0 +1 @@
+#include "../common/blink_leds.c"
diff --git a/firmware/fx2/src/usrp1/board_specific.c b/firmware/fx2/src/usrp1/board_specific.c
new file mode 100644
index 000000000..ef0081d84
--- /dev/null
+++ b/firmware/fx2/src/usrp1/board_specific.c
@@ -0,0 +1,113 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "usrp_common.h"
+#include "spi.h"
+
+void
+set_led_0 (unsigned char on)
+{
+  if (!on)			// active low
+    USRP_PC |= bmPC_LED0;
+  else
+    USRP_PC &= ~bmPC_LED0;
+}
+
+void 
+set_led_1 (unsigned char on)
+{
+  if (!on)			// active low
+    USRP_PC |= bmPC_LED1;
+  else
+    USRP_PC &= ~bmPC_LED1;
+}
+
+void
+toggle_led_0 (void)
+{
+  USRP_PC ^= bmPC_LED0;
+}
+
+void
+toggle_led_1 (void)
+{
+  USRP_PC ^= bmPC_LED1;
+}
+
+void
+la_trace_init (void)
+{
+}
+
+void
+set_sleep_bits (unsigned char bits, unsigned char mask)
+{
+  // NOP on usrp1
+}
+
+static xdata unsigned char xbuf[1];
+
+void
+write_9862 (unsigned char which, unsigned char regno, unsigned char value)
+{
+  xbuf[0] = value;
+  
+  spi_write (0, regno & 0x3f,
+	     which == 0 ? SPI_ENABLE_CODEC_A : SPI_ENABLE_CODEC_B,
+	     SPI_FMT_MSB | SPI_FMT_HDR_1,
+	     xbuf, 1);
+}
+
+void
+write_both_9862s (unsigned char regno, unsigned char value)
+{
+  xbuf[0] = value;
+  
+  spi_write (0, regno & 0x3f,
+	     SPI_ENABLE_CODEC_A | SPI_ENABLE_CODEC_B,
+	     SPI_FMT_MSB | SPI_FMT_HDR_1,
+	     xbuf, 1);
+}
+
+#define REG_RX_PWR_DN		 1
+#define	REG_TX_PWR_DN		 8
+#define	REG_TX_MODULATOR	20
+
+static void
+power_down_9862s (void)
+{
+  write_both_9862s (REG_RX_PWR_DN,    0x01);
+  write_both_9862s (REG_TX_PWR_DN,    0x0f);	// pwr dn digital and analog_both
+  write_both_9862s (REG_TX_MODULATOR, 0x00);	// coarse & fine modulators disabled
+}
+
+void
+init_board (void)
+{
+  la_trace_init ();
+  init_spi ();
+
+  USRP_PC &= ~bmPC_nRESET;	// active low reset
+  USRP_PC |= bmPC_nRESET;
+
+  power_down_9862s ();
+}
diff --git a/firmware/fx2/src/usrp1/check_mdelay.c b/firmware/fx2/src/usrp1/check_mdelay.c
new file mode 100644
index 000000000..ea4ccdb14
--- /dev/null
+++ b/firmware/fx2/src/usrp1/check_mdelay.c
@@ -0,0 +1 @@
+#include "../common/check_mdelay.c"
diff --git a/firmware/fx2/src/usrp1/check_udelay.c b/firmware/fx2/src/usrp1/check_udelay.c
new file mode 100644
index 000000000..d01622e5e
--- /dev/null
+++ b/firmware/fx2/src/usrp1/check_udelay.c
@@ -0,0 +1 @@
+#include "../common/check_udelay.c"
diff --git a/firmware/fx2/src/usrp1/edit-gpif b/firmware/fx2/src/usrp1/edit-gpif
new file mode 100755
index 000000000..5367b75a5
--- /dev/null
+++ b/firmware/fx2/src/usrp1/edit-gpif
@@ -0,0 +1,114 @@
+#!/usr/bin/env python
+# -*- Python -*-
+#
+# Copyright 2003 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+
+# Edit the gpif.c file generated by the Cypress GPIF Designer Tool and
+# produce usrp_gpif.c, and usrp_gpif_inline.h, files suitable for our
+# uses.
+
+import re
+import string
+import sys
+
+def check_flow_state (line, flow_state_dict):
+    mo = re.match (r'/\* Wave (\d) FlowStates \*/ (.*),', line)
+    if mo:
+        wave = int (mo.group (1))
+        data = mo.group (2)
+        split = data.split (',', 8)
+        v = map (lambda x : int (x, 16), split)
+        # print "%s, %s" % (wave, data)
+        # print "split: ", split
+        # print "v    : ", v
+        flow_state_dict[wave] = v
+
+
+def delta (xseq, yseq):
+    # set subtraction
+    z = []
+    for x in xseq:
+        if x not in yseq:
+            z.append (x)
+    return z
+    
+
+def write_define (output, name, pairs):
+    output.write ('#define %s()\t\\\n' % name)
+    output.write ('do {\t\t\t\t\t\\\n')
+    for reg, val in pairs:
+        output.write ('%14s = 0x%02x;\t\t\t\\\n' % (reg, val))
+    output.write ('} while (0)\n\n')
+    
+def write_inlines (output, dict):
+    regs = ['FLOWSTATE', 'FLOWLOGIC', 'FLOWEQ0CTL', 'FLOWEQ1CTL', 'FLOWHOLDOFF',
+            'FLOWSTB', 'FLOWSTBEDGE', 'FLOWSTBHPERIOD', 'GPIFHOLDAMOUNT']
+
+    READ_FLOW_STATE = 2
+    WRITE_FLOW_STATE = 3
+
+    read_info = zip (regs, dict[READ_FLOW_STATE])
+    write_info = zip (regs, dict[WRITE_FLOW_STATE])
+    
+    output.write ('''/*
+ * Machine generated by "edit-gpif".  Do not edit by hand.
+ */
+
+''')
+    write_define (output, 'setup_flowstate_common', read_info)
+    write_define (output, 'setup_flowstate_read', delta (read_info, write_info))
+    write_define (output, 'setup_flowstate_write', delta (write_info, read_info))
+    
+
+def edit_gpif (input_name, output_name, inline_name):
+    input = open (input_name, 'r')
+    output = open (output_name, 'w')
+    inline = open (inline_name, 'w')
+    flow_state_dict = {}
+
+    output.write ('''/*
+ * Machine generated by "edit-gpif".  Do not edit by hand.
+ */
+
+''')
+    
+    while 1:
+        line = input.readline ()
+        line = string.replace (line, '\r','')
+        line = re.sub (r' *$', r'', line)
+
+        check_flow_state (line, flow_state_dict)
+
+        line = re.sub (r'#include', r'// #include', line)
+        line = re.sub (r'xdata ', r'', line)
+        if re.search (r'GpifInit', line):
+            break
+        
+        output.write (line)
+
+    output.close ()
+    write_inlines (inline, flow_state_dict)
+    inline.close ()
+
+
+# gpif.c usrp_gpif.c usrp_gpif_inline.h
+edit_gpif (sys.argv[1], sys.argv[2], sys.argv[3])
diff --git a/firmware/fx2/src/usrp1/eeprom_boot.a51 b/firmware/fx2/src/usrp1/eeprom_boot.a51
new file mode 100644
index 000000000..65e452668
--- /dev/null
+++ b/firmware/fx2/src/usrp1/eeprom_boot.a51
@@ -0,0 +1,573 @@
+;--------------------------------------------------------
+; Hand tweaked minimal eeprom boot code
+;--------------------------------------------------------
+	.module eeprom_boot
+	.optsdcc -mmcs51 --model-small
+	
+;--------------------------------------------------------
+; Public variables in this module
+;--------------------------------------------------------
+	.globl _eeprom_init
+	.globl _EP8FIFOBUF
+	.globl _EP6FIFOBUF
+	.globl _EP4FIFOBUF
+	.globl _EP2FIFOBUF
+	.globl _EP1INBUF
+	.globl _EP1OUTBUF
+	.globl _EP0BUF
+	.globl _CT4
+	.globl _CT3
+	.globl _CT2
+	.globl _CT1
+	.globl _USBTEST
+	.globl _TESTCFG
+	.globl _DBUG
+	.globl _UDMACRCQUAL
+	.globl _UDMACRCL
+	.globl _UDMACRCH
+	.globl _GPIFHOLDAMOUNT
+	.globl _FLOWSTBHPERIOD
+	.globl _FLOWSTBEDGE
+	.globl _FLOWSTB
+	.globl _FLOWHOLDOFF
+	.globl _FLOWEQ1CTL
+	.globl _FLOWEQ0CTL
+	.globl _FLOWLOGIC
+	.globl _FLOWSTATE
+	.globl _GPIFABORT
+	.globl _GPIFREADYSTAT
+	.globl _GPIFREADYCFG
+	.globl _XGPIFSGLDATLNOX
+	.globl _XGPIFSGLDATLX
+	.globl _XGPIFSGLDATH
+	.globl _EP8GPIFTRIG
+	.globl _EP8GPIFPFSTOP
+	.globl _EP8GPIFFLGSEL
+	.globl _EP6GPIFTRIG
+	.globl _EP6GPIFPFSTOP
+	.globl _EP6GPIFFLGSEL
+	.globl _EP4GPIFTRIG
+	.globl _EP4GPIFPFSTOP
+	.globl _EP4GPIFFLGSEL
+	.globl _EP2GPIFTRIG
+	.globl _EP2GPIFPFSTOP
+	.globl _EP2GPIFFLGSEL
+	.globl _GPIFTCB0
+	.globl _GPIFTCB1
+	.globl _GPIFTCB2
+	.globl _GPIFTCB3
+	.globl _GPIFADRL
+	.globl _GPIFADRH
+	.globl _GPIFCTLCFG
+	.globl _GPIFIDLECTL
+	.globl _GPIFIDLECS
+	.globl _GPIFWFSELECT
+	.globl _SETUPDAT
+	.globl _SUDPTRCTL
+	.globl _SUDPTRL
+	.globl _SUDPTRH
+	.globl _EP8FIFOBCL
+	.globl _EP8FIFOBCH
+	.globl _EP6FIFOBCL
+	.globl _EP6FIFOBCH
+	.globl _EP4FIFOBCL
+	.globl _EP4FIFOBCH
+	.globl _EP2FIFOBCL
+	.globl _EP2FIFOBCH
+	.globl _EP8FIFOFLGS
+	.globl _EP6FIFOFLGS
+	.globl _EP4FIFOFLGS
+	.globl _EP2FIFOFLGS
+	.globl _EP8CS
+	.globl _EP6CS
+	.globl _EP4CS
+	.globl _EP2CS
+	.globl _EP1INCS
+	.globl _EP1OUTCS
+	.globl _EP0CS
+	.globl _EP8BCL
+	.globl _EP8BCH
+	.globl _EP6BCL
+	.globl _EP6BCH
+	.globl _EP4BCL
+	.globl _EP4BCH
+	.globl _EP2BCL
+	.globl _EP2BCH
+	.globl _EP1INBC
+	.globl _EP1OUTBC
+	.globl _EP0BCL
+	.globl _EP0BCH
+	.globl _FNADDR
+	.globl _MICROFRAME
+	.globl _USBFRAMEL
+	.globl _USBFRAMEH
+	.globl _TOGCTL
+	.globl _WAKEUPCS
+	.globl _SUSPEND
+	.globl _USBCS
+	.globl _XAUTODAT2
+	.globl _XAUTODAT1
+	.globl _I2CTL
+	.globl _I2DAT
+	.globl _I2CS
+	.globl _PORTECFG
+	.globl _PORTCCFG
+	.globl _PORTACFG
+	.globl _INTSETUP
+	.globl _INT4IVEC
+	.globl _INT2IVEC
+	.globl _CLRERRCNT
+	.globl _ERRCNTLIM
+	.globl _USBERRIRQ
+	.globl _USBERRIE
+	.globl _GPIFIRQ
+	.globl _GPIFIE
+	.globl _EPIRQ
+	.globl _EPIE
+	.globl _USBIRQ
+	.globl _USBIE
+	.globl _NAKIRQ
+	.globl _NAKIE
+	.globl _IBNIRQ
+	.globl _IBNIE
+	.globl _EP8FIFOIRQ
+	.globl _EP8FIFOIE
+	.globl _EP6FIFOIRQ
+	.globl _EP6FIFOIE
+	.globl _EP4FIFOIRQ
+	.globl _EP4FIFOIE
+	.globl _EP2FIFOIRQ
+	.globl _EP2FIFOIE
+	.globl _OUTPKTEND
+	.globl _INPKTEND
+	.globl _EP8ISOINPKTS
+	.globl _EP6ISOINPKTS
+	.globl _EP4ISOINPKTS
+	.globl _EP2ISOINPKTS
+	.globl _EP8FIFOPFL
+	.globl _EP8FIFOPFH
+	.globl _EP6FIFOPFL
+	.globl _EP6FIFOPFH
+	.globl _EP4FIFOPFL
+	.globl _EP4FIFOPFH
+	.globl _EP2FIFOPFL
+	.globl _EP2FIFOPFH
+	.globl _EP8AUTOINLENL
+	.globl _EP8AUTOINLENH
+	.globl _EP6AUTOINLENL
+	.globl _EP6AUTOINLENH
+	.globl _EP4AUTOINLENL
+	.globl _EP4AUTOINLENH
+	.globl _EP2AUTOINLENL
+	.globl _EP2AUTOINLENH
+	.globl _EP8FIFOCFG
+	.globl _EP6FIFOCFG
+	.globl _EP4FIFOCFG
+	.globl _EP2FIFOCFG
+	.globl _EP8CFG
+	.globl _EP6CFG
+	.globl _EP4CFG
+	.globl _EP2CFG
+	.globl _EP1INCFG
+	.globl _EP1OUTCFG
+	.globl _REVCTL
+	.globl _REVID
+	.globl _FIFOPINPOLAR
+	.globl _UART230
+	.globl _BPADDRL
+	.globl _BPADDRH
+	.globl _BREAKPT
+	.globl _FIFORESET
+	.globl _PINFLAGSCD
+	.globl _PINFLAGSAB
+	.globl _IFCONFIG
+	.globl _CPUCS
+	.globl _RES_WAVEDATA_END
+	.globl _GPIF_WAVE_DATA
+;--------------------------------------------------------
+; special function registers
+;--------------------------------------------------------
+_IOA	=	0x0080
+_SP	=	0x0081
+_DPL	=	0x0082
+_DPH	=	0x0083
+_DPL1	=	0x0084
+_DPH1	=	0x0085
+_DPS	=	0x0086
+_PCON	=	0x0087
+_TCON	=	0x0088
+_TMOD	=	0x0089
+_TL0	=	0x008a
+_TL1	=	0x008b
+_TH0	=	0x008c
+_TH1	=	0x008d
+_CKCON	=	0x008e
+_IOB	=	0x0090
+_EXIF	=	0x0091
+_MPAGE	=	0x0092
+_SCON0	=	0x0098
+_SBUF0	=	0x0099
+_APTR1H	=	0x009a
+_APTR1L	=	0x009b
+_AUTODAT1	=	0x009c
+_AUTOPTRH2	=	0x009d
+_AUTOPTRL2	=	0x009e
+_AUTODAT2	=	0x009f
+_IOC	=	0x00a0
+_INT2CLR	=	0x00a1
+_INT4CLR	=	0x00a2
+_IE	=	0x00a8
+_EP2468STAT	=	0x00aa
+_EP24FIFOFLGS	=	0x00ab
+_EP68FIFOFLGS	=	0x00ac
+_AUTOPTRSETUP	=	0x00af
+_IOD	=	0x00b0
+_IOE	=	0x00b1
+_OEA	=	0x00b2
+_OEB	=	0x00b3
+_OEC	=	0x00b4
+_OED	=	0x00b5
+_OEE	=	0x00b6
+_IP	=	0x00b8
+_EP01STAT	=	0x00ba
+_GPIFTRIG	=	0x00bb
+_GPIFSGLDATH	=	0x00bd
+_GPIFSGLDATLX	=	0x00be
+_GPIFSGLDATLNOX	=	0x00bf
+_SCON1	=	0x00c0
+_SBUF1	=	0x00c1
+_T2CON	=	0x00c8
+_RCAP2L	=	0x00ca
+_RCAP2H	=	0x00cb
+_TL2	=	0x00cc
+_TH2	=	0x00cd
+_PSW	=	0x00d0
+_EICON	=	0x00d8
+_ACC	=	0x00e0
+_EIE	=	0x00e8
+_B	=	0x00f0
+_EIP	=	0x00f8
+;--------------------------------------------------------
+; special function bits 
+;--------------------------------------------------------
+_SEL	=	0x0086
+_IT0	=	0x0088
+_IE0	=	0x0089
+_IT1	=	0x008a
+_IE1	=	0x008b
+_TR0	=	0x008c
+_TF0	=	0x008d
+_TR1	=	0x008e
+_TF1	=	0x008f
+_RI	=	0x0098
+_TI	=	0x0099
+_RB8	=	0x009a
+_TB8	=	0x009b
+_REN	=	0x009c
+_SM2	=	0x009d
+_SM1	=	0x009e
+_SM0	=	0x009f
+_EX0	=	0x00a8
+_ET0	=	0x00a9
+_EX1	=	0x00aa
+_ET1	=	0x00ab
+_ES0	=	0x00ac
+_ET2	=	0x00ad
+_ES1	=	0x00ae
+_EA	=	0x00af
+_PX0	=	0x00b8
+_PT0	=	0x00b9
+_PX1	=	0x00ba
+_PT1	=	0x00bb
+_PS0	=	0x00bc
+_PT2	=	0x00bd
+_PS1	=	0x00be
+_RI1	=	0x00c0
+_TI1	=	0x00c1
+_RB81	=	0x00c2
+_TB81	=	0x00c3
+_REN1	=	0x00c4
+_SM21	=	0x00c5
+_SM11	=	0x00c6
+_SM01	=	0x00c7
+_CP_RL2	=	0x00c8
+_C_T2	=	0x00c9
+_TR2	=	0x00ca
+_EXEN2	=	0x00cb
+_TCLK	=	0x00cc
+_RCLK	=	0x00cd
+_EXF2	=	0x00ce
+_TF2	=	0x00cf
+_P	=	0x00d0
+_FL	=	0x00d1
+_OV	=	0x00d2
+_RS0	=	0x00d3
+_RS1	=	0x00d4
+_F0	=	0x00d5
+_AC	=	0x00d6
+_CY	=	0x00d7
+_INT6	=	0x00db
+_RESI	=	0x00dc
+_ERESI	=	0x00dd
+_SMOD1	=	0x00df
+_EIUSB	=	0x00e8
+_EI2C	=	0x00e9
+_EIEX4	=	0x00ea
+_EIEX5	=	0x00eb
+_EIEX6	=	0x00ec
+_PUSB	=	0x00f8
+_PI2C	=	0x00f9
+_EIPX4	=	0x00fa
+_EIPX5	=	0x00fb
+_EIPX6	=	0x00fc
+_bitS_CLK	=	0x0080
+_bitS_OUT	=	0x0081
+_bitS_IN	=	0x0082
+_bitALTERA_DATA0	=	0x00a1
+_bitALTERA_DCLK	=	0x00a3
+;--------------------------------------------------------
+; overlayable register banks 
+;--------------------------------------------------------
+	.area REG_BANK_0	(REL,OVR,DATA)
+	.ds 8
+;--------------------------------------------------------
+; internal ram data
+;--------------------------------------------------------
+	.area DSEG    (DATA)
+;--------------------------------------------------------
+; overlayable items in internal ram 
+;--------------------------------------------------------
+	.area OSEG    (OVR,DATA)
+;--------------------------------------------------------
+; Stack segment in internal ram 
+;--------------------------------------------------------
+	.area	SSEG	(DATA)
+__start__stack:
+	.ds	1
+
+;--------------------------------------------------------
+; indirectly addressable internal ram data
+;--------------------------------------------------------
+	.area ISEG    (DATA)
+;--------------------------------------------------------
+; bit data
+;--------------------------------------------------------
+	.area BSEG    (BIT)
+;--------------------------------------------------------
+; external ram data
+;--------------------------------------------------------
+	.area XSEG    (XDATA)
+_GPIF_WAVE_DATA	=	0xe400
+_RES_WAVEDATA_END	=	0xe480
+_CPUCS	=	0xe600
+_IFCONFIG	=	0xe601
+_PINFLAGSAB	=	0xe602
+_PINFLAGSCD	=	0xe603
+_FIFORESET	=	0xe604
+_BREAKPT	=	0xe605
+_BPADDRH	=	0xe606
+_BPADDRL	=	0xe607
+_UART230	=	0xe608
+_FIFOPINPOLAR	=	0xe609
+_REVID	=	0xe60a
+_REVCTL	=	0xe60b
+_EP1OUTCFG	=	0xe610
+_EP1INCFG	=	0xe611
+_EP2CFG	=	0xe612
+_EP4CFG	=	0xe613
+_EP6CFG	=	0xe614
+_EP8CFG	=	0xe615
+_EP2FIFOCFG	=	0xe618
+_EP4FIFOCFG	=	0xe619
+_EP6FIFOCFG	=	0xe61a
+_EP8FIFOCFG	=	0xe61b
+_EP2AUTOINLENH	=	0xe620
+_EP2AUTOINLENL	=	0xe621
+_EP4AUTOINLENH	=	0xe622
+_EP4AUTOINLENL	=	0xe623
+_EP6AUTOINLENH	=	0xe624
+_EP6AUTOINLENL	=	0xe625
+_EP8AUTOINLENH	=	0xe626
+_EP8AUTOINLENL	=	0xe627
+_EP2FIFOPFH	=	0xe630
+_EP2FIFOPFL	=	0xe631
+_EP4FIFOPFH	=	0xe632
+_EP4FIFOPFL	=	0xe633
+_EP6FIFOPFH	=	0xe634
+_EP6FIFOPFL	=	0xe635
+_EP8FIFOPFH	=	0xe636
+_EP8FIFOPFL	=	0xe637
+_EP2ISOINPKTS	=	0xe640
+_EP4ISOINPKTS	=	0xe641
+_EP6ISOINPKTS	=	0xe642
+_EP8ISOINPKTS	=	0xe643
+_INPKTEND	=	0xe648
+_OUTPKTEND	=	0xe649
+_EP2FIFOIE	=	0xe650
+_EP2FIFOIRQ	=	0xe651
+_EP4FIFOIE	=	0xe652
+_EP4FIFOIRQ	=	0xe653
+_EP6FIFOIE	=	0xe654
+_EP6FIFOIRQ	=	0xe655
+_EP8FIFOIE	=	0xe656
+_EP8FIFOIRQ	=	0xe657
+_IBNIE	=	0xe658
+_IBNIRQ	=	0xe659
+_NAKIE	=	0xe65a
+_NAKIRQ	=	0xe65b
+_USBIE	=	0xe65c
+_USBIRQ	=	0xe65d
+_EPIE	=	0xe65e
+_EPIRQ	=	0xe65f
+_GPIFIE	=	0xe660
+_GPIFIRQ	=	0xe661
+_USBERRIE	=	0xe662
+_USBERRIRQ	=	0xe663
+_ERRCNTLIM	=	0xe664
+_CLRERRCNT	=	0xe665
+_INT2IVEC	=	0xe666
+_INT4IVEC	=	0xe667
+_INTSETUP	=	0xe668
+_PORTACFG	=	0xe670
+_PORTCCFG	=	0xe671
+_PORTECFG	=	0xe672
+_I2CS	=	0xe678
+_I2DAT	=	0xe679
+_I2CTL	=	0xe67a
+_XAUTODAT1	=	0xe67b
+_XAUTODAT2	=	0xe67c
+_USBCS	=	0xe680
+_SUSPEND	=	0xe681
+_WAKEUPCS	=	0xe682
+_TOGCTL	=	0xe683
+_USBFRAMEH	=	0xe684
+_USBFRAMEL	=	0xe685
+_MICROFRAME	=	0xe686
+_FNADDR	=	0xe687
+_EP0BCH	=	0xe68a
+_EP0BCL	=	0xe68b
+_EP1OUTBC	=	0xe68d
+_EP1INBC	=	0xe68f
+_EP2BCH	=	0xe690
+_EP2BCL	=	0xe691
+_EP4BCH	=	0xe694
+_EP4BCL	=	0xe695
+_EP6BCH	=	0xe698
+_EP6BCL	=	0xe699
+_EP8BCH	=	0xe69c
+_EP8BCL	=	0xe69d
+_EP0CS	=	0xe6a0
+_EP1OUTCS	=	0xe6a1
+_EP1INCS	=	0xe6a2
+_EP2CS	=	0xe6a3
+_EP4CS	=	0xe6a4
+_EP6CS	=	0xe6a5
+_EP8CS	=	0xe6a6
+_EP2FIFOFLGS	=	0xe6a7
+_EP4FIFOFLGS	=	0xe6a8
+_EP6FIFOFLGS	=	0xe6a9
+_EP8FIFOFLGS	=	0xe6aa
+_EP2FIFOBCH	=	0xe6ab
+_EP2FIFOBCL	=	0xe6ac
+_EP4FIFOBCH	=	0xe6ad
+_EP4FIFOBCL	=	0xe6ae
+_EP6FIFOBCH	=	0xe6af
+_EP6FIFOBCL	=	0xe6b0
+_EP8FIFOBCH	=	0xe6b1
+_EP8FIFOBCL	=	0xe6b2
+_SUDPTRH	=	0xe6b3
+_SUDPTRL	=	0xe6b4
+_SUDPTRCTL	=	0xe6b5
+_SETUPDAT	=	0xe6b8
+_GPIFWFSELECT	=	0xe6c0
+_GPIFIDLECS	=	0xe6c1
+_GPIFIDLECTL	=	0xe6c2
+_GPIFCTLCFG	=	0xe6c3
+_GPIFADRH	=	0xe6c4
+_GPIFADRL	=	0xe6c5
+_GPIFTCB3	=	0xe6ce
+_GPIFTCB2	=	0xe6cf
+_GPIFTCB1	=	0xe6d0
+_GPIFTCB0	=	0xe6d1
+_EP2GPIFFLGSEL	=	0xe6d2
+_EP2GPIFPFSTOP	=	0xe6d3
+_EP2GPIFTRIG	=	0xe6d4
+_EP4GPIFFLGSEL	=	0xe6da
+_EP4GPIFPFSTOP	=	0xe6db
+_EP4GPIFTRIG	=	0xe6dc
+_EP6GPIFFLGSEL	=	0xe6e2
+_EP6GPIFPFSTOP	=	0xe6e3
+_EP6GPIFTRIG	=	0xe6e4
+_EP8GPIFFLGSEL	=	0xe6ea
+_EP8GPIFPFSTOP	=	0xe6eb
+_EP8GPIFTRIG	=	0xe6ec
+_XGPIFSGLDATH	=	0xe6f0
+_XGPIFSGLDATLX	=	0xe6f1
+_XGPIFSGLDATLNOX	=	0xe6f2
+_GPIFREADYCFG	=	0xe6f3
+_GPIFREADYSTAT	=	0xe6f4
+_GPIFABORT	=	0xe6f5
+_FLOWSTATE	=	0xe6c6
+_FLOWLOGIC	=	0xe6c7
+_FLOWEQ0CTL	=	0xe6c8
+_FLOWEQ1CTL	=	0xe6c9
+_FLOWHOLDOFF	=	0xe6ca
+_FLOWSTB	=	0xe6cb
+_FLOWSTBEDGE	=	0xe6cc
+_FLOWSTBHPERIOD	=	0xe6cd
+_GPIFHOLDAMOUNT	=	0xe60c
+_UDMACRCH	=	0xe67d
+_UDMACRCL	=	0xe67e
+_UDMACRCQUAL	=	0xe67f
+_DBUG	=	0xe6f8
+_TESTCFG	=	0xe6f9
+_USBTEST	=	0xe6fa
+_CT1	=	0xe6fb
+_CT2	=	0xe6fc
+_CT3	=	0xe6fd
+_CT4	=	0xe6fe
+_EP0BUF	=	0xe740
+_EP1OUTBUF	=	0xe780
+_EP1INBUF	=	0xe7c0
+_EP2FIFOBUF	=	0xf000
+_EP4FIFOBUF	=	0xf400
+_EP6FIFOBUF	=	0xf800
+_EP8FIFOBUF	=	0xfc00
+;--------------------------------------------------------
+; external initialized ram data
+;--------------------------------------------------------
+;--------------------------------------------------------
+; interrupt vector 
+;--------------------------------------------------------
+	.area CSEG    (CODE)
+__interrupt_vect:
+	ljmp	__sdcc_gsinit_startup
+;--------------------------------------------------------
+; global & static initialisations
+;--------------------------------------------------------
+	.area GSINIT  (CODE)
+	.area GSFINAL (CODE)
+	.area GSINIT  (CODE)
+__sdcc_gsinit_startup:
+	mov	sp,#__start__stack - 1
+	lcall	__sdcc_external_startup
+	mov	a,dpl
+	jz	__sdcc_init_data
+	ljmp	__sdcc_program_startup
+__sdcc_init_data:
+	.area GSFINAL (CODE)
+	ljmp	__sdcc_program_startup
+;--------------------------------------------------------
+; Home
+;--------------------------------------------------------
+	.area HOME    (CODE)
+	.area CSEG    (CODE)
+;--------------------------------------------------------
+; code
+;--------------------------------------------------------
+	.area CSEG    (CODE)
+__sdcc_program_startup:
+	lcall	_eeprom_init
+;	return from _eeprom_init will spin here
+	sjmp .
+	.area CSEG    (CODE)
diff --git a/firmware/fx2/src/usrp1/eeprom_init.c b/firmware/fx2/src/usrp1/eeprom_init.c
new file mode 100644
index 000000000..a6f6cbe2d
--- /dev/null
+++ b/firmware/fx2/src/usrp1/eeprom_init.c
@@ -0,0 +1,116 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "usrp_common.h"
+#include "usrp_commands.h"
+#include "spi.h"
+
+/*
+ * the host side fpga loader code pushes an MD5 hash of the bitstream
+ * into hash1.
+ */
+#define	  USRP_HASH_SIZE      16
+xdata at USRP_HASH_SLOT_0_ADDR unsigned char hash0[USRP_HASH_SIZE];
+
+
+#define enable_codecs() USRP_PA &= ~(bmPA_SEN_CODEC_A | bmPA_SEN_CODEC_B)
+#define disable_all()	USRP_PA |=  (bmPA_SEN_CODEC_A | bmPA_SEN_CODEC_B)
+
+static void
+write_byte_msb (unsigned char v);
+
+void
+write_both_9862s (unsigned char header_lo, unsigned char v)
+{
+  enable_codecs ();
+
+  write_byte_msb (header_lo);
+  write_byte_msb (v);
+
+  disable_all ();
+}
+
+// ----------------------------------------------------------------
+
+static void
+write_byte_msb (unsigned char v)
+{
+  unsigned char n = 8;
+  do {
+    v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+    bitS_OUT = v & 0x1;
+    bitS_CLK = 1;
+    bitS_CLK = 0;
+  } while (--n != 0);
+}
+
+// ----------------------------------------------------------------
+
+#define REG_RX_PWR_DN		 1
+#define	REG_TX_PWR_DN		 8
+#define	REG_TX_MODULATOR	20
+
+void eeprom_init (void)
+{
+  unsigned short counter;
+  unsigned char	 i;
+
+  // configure IO ports (B and D are used by GPIF)
+
+  IOA = bmPORT_A_INITIAL;	// Port A initial state
+  OEA = bmPORT_A_OUTPUTS;	// Port A direction register
+
+  IOC = bmPORT_C_INITIAL;	// Port C initial state
+  OEC = bmPORT_C_OUTPUTS;	// Port C direction register
+
+  IOE = bmPORT_E_INITIAL;	// Port E initial state
+  OEE = bmPORT_E_OUTPUTS;	// Port E direction register
+
+  EP0BCH = 0;			SYNCDELAY;
+
+  // USBCS &= ~bmRENUM;		// chip firmware handles commands
+  USBCS = 0;			// chip firmware handles commands
+
+  USRP_PC &= ~bmPC_nRESET;	// active low reset
+  USRP_PC |=  bmPC_nRESET;
+
+  // init_spi ();
+  bitS_OUT = 0;			/* idle state has CLK = 0 */
+
+  write_both_9862s (REG_RX_PWR_DN,    0x01);
+  write_both_9862s (REG_TX_PWR_DN,    0x0f);	// pwr dn digital and analog_both
+  write_both_9862s (REG_TX_MODULATOR, 0x00);	// coarse & fine modulators disabled
+
+  // zero firmware hash slot
+  i = 0;
+  do {
+    hash0[i] = 0;
+    i++;
+  } while (i != USRP_HASH_SIZE);
+
+  counter = 0;
+  while (1){
+    counter++;
+    if (counter & 0x8000)
+      IOC ^= bmPC_LED0;
+  }
+}
diff --git a/firmware/fx2/src/usrp1/eeprom_io.c b/firmware/fx2/src/usrp1/eeprom_io.c
new file mode 100644
index 000000000..9eeb53636
--- /dev/null
+++ b/firmware/fx2/src/usrp1/eeprom_io.c
@@ -0,0 +1,65 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "eeprom_io.h"
+#include "i2c.h"
+#include "delay.h"
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_read (unsigned char i2c_addr, unsigned char eeprom_offset,
+	     xdata unsigned char *buf, unsigned char len)
+{
+  // We setup a random read by first doing a "zero byte write".
+  // Writes carry an address.  Reads use an implicit address.
+
+  static xdata unsigned char cmd[1];
+  cmd[0] = eeprom_offset;
+  if (!i2c_write(i2c_addr, cmd, 1))
+    return 0;
+
+  return i2c_read(i2c_addr, buf, len);
+}
+
+
+#if 0
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_write (unsigned char i2c_addr, unsigned char eeprom_offset,
+	      const xdata unsigned char *buf, unsigned char len)
+{
+  static xdata unsigned char cmd[2];
+  unsigned char ok;
+
+  while (len-- > 0){
+    cmd[0] = eeprom_offset++;
+    cmd[1] = *buf++;
+    ok = i2c_write(i2c_addr, cmd, 2);
+    mdelay(10);		// delay 10ms worst case write time
+    if (!ok)
+      return 0;
+  }
+  return 1;
+}
+
+#endif
diff --git a/firmware/fx2/src/usrp1/eeprom_io.h b/firmware/fx2/src/usrp1/eeprom_io.h
new file mode 100644
index 000000000..558017b12
--- /dev/null
+++ b/firmware/fx2/src/usrp1/eeprom_io.h
@@ -0,0 +1,38 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_EEPROM_IO_H
+#define INCLUDED_EEPROM_IO_H
+
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_read (unsigned char i2c_addr, unsigned char eeprom_offset,
+	     xdata unsigned char *buf, unsigned char len);
+
+// returns non-zero if successful, else 0
+unsigned char
+eeprom_write (unsigned char i2c_addr, unsigned char eeprom_offset,
+	      const xdata unsigned char *buf, unsigned char len);
+
+
+#endif /* INCLUDED_EEPROM_IO_H */
diff --git a/firmware/fx2/src/usrp1/fpga_load.c b/firmware/fx2/src/usrp1/fpga_load.c
new file mode 100644
index 000000000..b0256e925
--- /dev/null
+++ b/firmware/fx2/src/usrp1/fpga_load.c
@@ -0,0 +1 @@
+#include "../common/fpga_load.c"
diff --git a/firmware/fx2/src/usrp1/fpga_rev2.c b/firmware/fx2/src/usrp1/fpga_rev2.c
new file mode 100644
index 000000000..cca961dc4
--- /dev/null
+++ b/firmware/fx2/src/usrp1/fpga_rev2.c
@@ -0,0 +1,122 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "fpga.h"
+#include "fpga_regs_common.h"
+#include "usrp_common.h"
+#include "usrp_globals.h"
+#include "spi.h"
+
+unsigned char g_tx_reset = 0;
+unsigned char g_rx_reset = 0;
+
+void
+fpga_write_reg (unsigned char regno, const xdata unsigned char *regval)
+{
+  spi_write (0, 0x00 | (regno & 0x7f),
+	     SPI_ENABLE_FPGA,
+	     SPI_FMT_MSB | SPI_FMT_HDR_1,
+	     regval, 4);
+}
+
+
+static xdata unsigned char regval[4] = {0, 0, 0, 0};
+
+static void
+write_fpga_master_ctrl (void)
+{
+  unsigned char v = 0;
+  if (g_tx_enable)
+    v |= bmFR_MC_ENABLE_TX;
+  if (g_rx_enable)
+    v |= bmFR_MC_ENABLE_RX;
+  if (g_tx_reset)
+    v |= bmFR_MC_RESET_TX;
+  if (g_rx_reset)
+    v |= bmFR_MC_RESET_RX;
+  regval[3] = v;
+
+  fpga_write_reg (FR_MASTER_CTRL, regval);
+}
+
+// Resets both AD9862's and the FPGA serial bus interface.
+
+void
+fpga_set_reset (unsigned char on)
+{
+  on &= 0x1;
+
+  if (on){
+    USRP_PC &= ~bmPC_nRESET;		// active low
+    g_tx_enable = 0;
+    g_rx_enable = 0;
+    g_tx_reset = 0;
+    g_rx_reset = 0;
+  }
+  else
+    USRP_PC |= bmPC_nRESET;
+}
+
+void
+fpga_set_tx_enable (unsigned char on)
+{
+  on &= 0x1;
+  g_tx_enable = on;
+
+  write_fpga_master_ctrl ();
+
+  if (on){
+    g_tx_underrun = 0;
+    fpga_clear_flags ();
+  }
+}
+
+void
+fpga_set_rx_enable (unsigned char on)
+{
+  on &= 0x1;
+  g_rx_enable = on;
+  
+  write_fpga_master_ctrl ();
+  if (on){
+    g_rx_overrun = 0;
+    fpga_clear_flags ();
+  }
+}
+
+void
+fpga_set_tx_reset (unsigned char on)
+{
+  on &= 0x1;
+  g_tx_reset = on;
+
+  write_fpga_master_ctrl ();
+}
+
+void
+fpga_set_rx_reset (unsigned char on)
+{
+  on &= 0x1;
+  g_rx_reset = on;
+  
+  write_fpga_master_ctrl ();
+}
diff --git a/firmware/fx2/src/usrp1/fpga_rev2.h b/firmware/fx2/src/usrp1/fpga_rev2.h
new file mode 100644
index 000000000..54ec3f9fa
--- /dev/null
+++ b/firmware/fx2/src/usrp1/fpga_rev2.h
@@ -0,0 +1,58 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003,2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#ifndef INCLUDED_FPGA_REV1_H
+#define INCLUDED_FPGA_REV1_H
+
+void fpga_set_reset (unsigned char v);
+void fpga_set_tx_enable (unsigned char v);
+void fpga_set_rx_enable (unsigned char v);
+void fpga_set_tx_reset (unsigned char v);
+void fpga_set_rx_reset (unsigned char v);
+
+unsigned char fpga_has_room_for_packet (void);
+unsigned char fpga_has_packet_avail (void);
+
+#if (UC_BOARD_HAS_FPGA)
+/*
+ * return TRUE iff FPGA internal fifo has room for 512 bytes.
+ */
+#define fpga_has_room_for_packet()	(GPIFREADYSTAT & bmFPGA_HAS_SPACE)
+
+/*
+ * return TRUE iff FPGA internal fifo has at least 512 bytes available.
+ */
+#define fpga_has_packet_avail()		(GPIFREADYSTAT & bmFPGA_PKT_AVAIL)
+
+#else	/* no FPGA on board.  fake it. */
+
+#define fpga_has_room_for_packet()	TRUE
+#define	fpga_has_packet_avail()		TRUE
+
+#endif
+
+#define	fpga_clear_flags()				\
+	do {						\
+	  USRP_PE |= bmPE_FPGA_CLR_STATUS;		\
+	  USRP_PE &= ~bmPE_FPGA_CLR_STATUS;		\
+        } while (0)
+
+
+#endif /* INCLUDED_FPGA_REV1_H */
diff --git a/firmware/fx2/src/usrp1/gpif.c b/firmware/fx2/src/usrp1/gpif.c
new file mode 100644
index 000000000..f6745a43b
--- /dev/null
+++ b/firmware/fx2/src/usrp1/gpif.c
@@ -0,0 +1,292 @@
+// This program configures the General Programmable Interface (GPIF) for FX2.     
+// Please do not modify sections of text which are marked as "DO NOT EDIT ...". 
+//                                                                                
+// DO NOT EDIT ...                  
+// GPIF Initialization              
+// Interface Timing      Async        
+// Internal Ready Init   IntRdy=1     
+// CTL Out Tristate-able Binary       
+// SingleWrite WF Select     1     
+// SingleRead WF Select      0     
+// FifoWrite WF Select       3     
+// FifoRead WF Select        2     
+// Data Bus Idle Drive   Tristate     
+// END DO NOT EDIT                  
+                                    
+// DO NOT EDIT ...       
+// GPIF Wave Names       
+// Wave 0   = singlerd     
+// Wave 1   = singlewr     
+// Wave 2   = FIFORd       
+// Wave 3   = FIFOWr       
+                         
+// GPIF Ctrl Outputs   Level   
+// CTL 0    = WEN#     CMOS        
+// CTL 1    = REN#     CMOS        
+// CTL 2    = OE#      CMOS        
+// CTL 3    = CLRST    CMOS        
+// CTL 4    = unused   CMOS        
+// CTL 5    = BOGUS    CMOS        
+                               
+// GPIF Rdy Inputs         
+// RDY0     = EF#            
+// RDY1     = FF#            
+// RDY2     = unused         
+// RDY3     = unused         
+// RDY4     = unused         
+// RDY5     = TCXpire        
+// FIFOFlag = FIFOFlag       
+// IntReady = IntReady       
+// END DO NOT EDIT         
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 0: singlerd                                                                
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   NO Data   NO Data   NO Data   NO Data   NO Data   NO Data            
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    Wait 1    Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A                                                                                
+//   LFunc                                                                                 
+//   Term B                                                                                
+// Branch1                                                                                 
+// Branch0                                                                                 
+// Re-Exec                                                                                 
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 1: singlewr                                                                
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode Activate  Activate  Activate  Activate  Activate  Activate  Activate           
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A           EF#                                                                  
+//   LFunc            AND                                                                  
+//   Term B           EF#                                                                  
+// Branch1            ThenIdle                                                             
+// Branch0            ElseIdle                                                             
+// Re-Exec            No                                                                   
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         1         1         1         1         1         1         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 2: FIFORd                                                                  
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   Activate  NO Data   NO Data   NO Data   NO Data   NO Data            
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    IF        Wait 1    Wait 1    Wait 1             
+//   Term A           TCXpire             TCXpire                                          
+//   LFunc            AND                 AND                                              
+//   Term B           TCXpire             TCXpire                                          
+// Branch1            Then 2              ThenIdle                                         
+// Branch0            Else 1              ElseIdle                                         
+// Re-Exec            No                  No                                               
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         1         0         0         0         0         0         0         0    
+// OE#          1         1         1         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+// DO NOT EDIT ...                                                                         
+//                                                                                         
+// GPIF Waveform 3: FIFOWr                                                                  
+//                                                                                         
+// Interval     0         1         2         3         4         5         6     Idle (7) 
+//          _________ _________ _________ _________ _________ _________ _________ _________
+//                                                                                         
+// AddrMode Same Val  Same Val  Same Val  Same Val  Same Val  Same Val  Same Val           
+// DataMode NO Data   Activate  Activate  Activate  Activate  Activate  Activate           
+// NextData SameData  SameData  SameData  SameData  SameData  SameData  SameData           
+// Int Trig No Int    No Int    No Int    No Int    No Int    No Int    No Int             
+// IF/Wait  Wait 1    IF        Wait 1    Wait 1    Wait 1    Wait 1    Wait 1             
+//   Term A           TCXpire                                                              
+//   LFunc            AND                                                                  
+//   Term B           TCXpire                                                              
+// Branch1            ThenIdle                                                             
+// Branch0            Else 1                                                               
+// Re-Exec            No                                                                   
+// Sngl/CRC Default   Default   Default   Default   Default   Default   Default            
+// WEN#         0         0         0         0         0         0         0         0    
+// REN#         0         0         0         0         0         0         0         0    
+// OE#          0         0         0         0         0         0         0         0    
+// CLRST        0         0         0         0         0         0         0         0    
+// unused       0         0         0         0         0         0         0         0    
+// BOGUS        0         0         0         0         0         0         0         0    
+//                     
+// END DO NOT EDIT     
+                                              
+// GPIF Program Code                          
+                                              
+// DO NOT EDIT ...                            
+#include "fx2.h"                            
+#include "fx2regs.h"                        
+#include "fx2sdly.h"     // SYNCDELAY macro 
+// END DO NOT EDIT                            
+                                              
+// DO NOT EDIT ...                     
+const char xdata WaveData[128] =     
+{                                      
+// Wave 0 
+/* LenBr */ 0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+// Wave 1 
+/* LenBr */ 0x01,     0x3F,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x22,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
+/* Output*/ 0x00,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x00,
+/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+// Wave 2 
+/* LenBr */ 0x01,     0x11,     0x01,     0x3F,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x03,     0x00,     0x01,     0x00,     0x00,     0x00,     0x00,
+/* Output*/ 0x06,     0x04,     0x04,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x2D,     0x00,     0x2D,     0x00,     0x00,     0x00,     0x3F,
+// Wave 3 
+/* LenBr */ 0x01,     0x39,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
+/* Opcode*/ 0x00,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
+/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
+/* LFun  */ 0x00,     0x2D,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
+};                     
+// END DO NOT EDIT     
+                       
+// DO NOT EDIT ...                     
+const char xdata FlowStates[36] =   
+{                                      
+/* Wave 0 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+/* Wave 1 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+/* Wave 2 FlowStates */ 0x81,0x2D,0x26,0x00,0x04,0x04,0x03,0x02,0x00,
+/* Wave 3 FlowStates */ 0x81,0x2D,0x21,0x00,0x04,0x04,0x03,0x02,0x00,
+};                     
+// END DO NOT EDIT     
+                       
+// DO NOT EDIT ...                                               
+const char xdata InitData[7] =                                   
+{                                                                
+/* Regs  */ 0xA0,0x00,0x00,0x00,0xEE,0x4E,0x00     
+};                                                               
+// END DO NOT EDIT                                               
+                                                                 
+// TO DO: You may add additional code below.
+
+void GpifInit( void )
+{
+  BYTE i;
+ 
+  // Registers which require a synchronization delay, see section 15.14
+  // FIFORESET        FIFOPINPOLAR
+  // INPKTEND         OUTPKTEND
+  // EPxBCH:L         REVCTL
+  // GPIFTCB3         GPIFTCB2
+  // GPIFTCB1         GPIFTCB0
+  // EPxFIFOPFH:L     EPxAUTOINLENH:L
+  // EPxFIFOCFG       EPxGPIFFLGSEL
+  // PINFLAGSxx       EPxFIFOIRQ
+  // EPxFIFOIE        GPIFIRQ
+  // GPIFIE           GPIFADRH:L
+  // UDMACRCH:L       EPxGPIFTRIG
+  // GPIFTRIG
+  
+  // Note: The pre-REVE EPxGPIFTCH/L register are affected, as well...
+  //      ...these have been replaced by GPIFTC[B3:B0] registers
+ 
+  // 8051 doesn't have access to waveform memories 'til
+  // the part is in GPIF mode.
+ 
+  IFCONFIG = 0xEE;
+  // IFCLKSRC=1   , FIFOs executes on internal clk source
+  // xMHz=1       , 48MHz internal clk rate
+  // IFCLKOE=0    , Don't drive IFCLK pin signal at 48MHz
+  // IFCLKPOL=0   , Don't invert IFCLK pin signal from internal clk
+  // ASYNC=1      , master samples asynchronous
+  // GSTATE=1     , Drive GPIF states out on PORTE[2:0], debug WF
+  // IFCFG[1:0]=10, FX2 in GPIF master mode
+ 
+  GPIFABORT = 0xFF;  // abort any waveforms pending
+ 
+  GPIFREADYCFG = InitData[ 0 ];
+  GPIFCTLCFG = InitData[ 1 ];
+  GPIFIDLECS = InitData[ 2 ];
+  GPIFIDLECTL = InitData[ 3 ];
+  GPIFWFSELECT = InitData[ 5 ];
+  GPIFREADYSTAT = InitData[ 6 ];
+ 
+  // use dual autopointer feature... 
+  AUTOPTRSETUP = 0x07;          // inc both pointers, 
+                                // ...warning: this introduces pdata hole(s)
+                                // ...at E67B (XAUTODAT1) and E67C (XAUTODAT2)
+  
+  // source
+  AUTOPTRH1 = MSB( &WaveData );
+  AUTOPTRL1 = LSB( &WaveData );
+  
+  // destination
+  AUTOPTRH2 = 0xE4;
+  AUTOPTRL2 = 0x00;
+ 
+  // transfer
+  for ( i = 0x00; i < 128; i++ )
+  {
+    EXTAUTODAT2 = EXTAUTODAT1;
+  }
+ 
+// Configure GPIF Address pins, output initial value,
+  PORTCCFG = 0xFF;    // [7:0] as alt. func. GPIFADR[7:0]
+  OEC = 0xFF;         // and as outputs
+  PORTECFG |= 0x80;   // [8] as alt. func. GPIFADR[8]
+  OEE |= 0x80;        // and as output
+ 
+// ...OR... tri-state GPIFADR[8:0] pins
+//  PORTCCFG = 0x00;  // [7:0] as port I/O
+//  OEC = 0x00;       // and as inputs
+//  PORTECFG &= 0x7F; // [8] as port I/O
+//  OEE &= 0x7F;      // and as input
+ 
+// GPIF address pins update when GPIFADRH/L written
+  SYNCDELAY;                    // 
+  GPIFADRH = 0x00;    // bits[7:1] always 0
+  SYNCDELAY;                    // 
+  GPIFADRL = 0x00;    // point to PERIPHERAL address 0x0000
+ 
+// Configure GPIF FlowStates registers for Wave 0 of WaveData
+  FLOWSTATE = FlowStates[ 0 ];
+  FLOWLOGIC = FlowStates[ 1 ];
+  FLOWEQ0CTL = FlowStates[ 2 ];
+  FLOWEQ1CTL = FlowStates[ 3 ];
+  FLOWHOLDOFF = FlowStates[ 4 ];
+  FLOWSTB = FlowStates[ 5 ];
+  FLOWSTBEDGE = FlowStates[ 6 ];
+  FLOWSTBHPERIOD = FlowStates[ 7 ];
+}
+ 
diff --git a/firmware/fx2/src/usrp1/gpif.gpf b/firmware/fx2/src/usrp1/gpif.gpf
new file mode 100755
index 000000000..854e25399
--- /dev/null
+++ b/firmware/fx2/src/usrp1/gpif.gpf
diff --git a/firmware/fx2/src/usrp1/init_gpif.c b/firmware/fx2/src/usrp1/init_gpif.c
new file mode 100644
index 000000000..0f5944b3b
--- /dev/null
+++ b/firmware/fx2/src/usrp1/init_gpif.c
@@ -0,0 +1 @@
+#include "../common/init_gpif.c"
diff --git a/firmware/fx2/src/usrp1/spi.c b/firmware/fx2/src/usrp1/spi.c
new file mode 100644
index 000000000..0aaffea5d
--- /dev/null
+++ b/firmware/fx2/src/usrp1/spi.c
@@ -0,0 +1,472 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "spi.h"
+#include "usrp_rev2_regs.h"
+
+static void
+setup_enables (unsigned char enables)
+{
+  // Software eanbles are active high.
+  // Hardware enables are active low.
+
+  // Uhh, the CODECs are active low, but the FPGA is active high...
+  enables ^= SPI_ENABLE_FPGA;
+
+  // KLUDGE: This code is fragile, but reasonably fast...
+  // low three bits of enables go into port A
+  USRP_PA = USRP_PA | (0x7 << 3);	// disable FPGA, CODEC_A, CODEC_B
+  USRP_PA ^= (enables & 0x7) << 3;	// enable specified devs
+
+  // high four bits of enables go into port E
+  USRP_PE = USRP_PE | (0xf << 4);	// disable TX_A, RX_A, TX_B, RX_B
+  USRP_PE ^= (enables & 0xf0);		// enable specified devs
+}
+
+#define disable_all()	setup_enables (0)
+
+void
+init_spi (void)
+{
+  disable_all ();		/* disable all devs	  */
+  bitS_OUT = 0;			/* idle state has CLK = 0 */
+}
+
+#if 0
+static unsigned char
+count_bits8 (unsigned char v)
+{
+  static unsigned char count4[16] = {
+    0,	// 0
+    1,	// 1
+    1,	// 2
+    2,	// 3
+    1,	// 4
+    2,	// 5
+    2,	// 6
+    3,	// 7
+    1,	// 8
+    2,	// 9
+    2,	// a
+    3,	// b
+    2,	// c
+    3,	// d
+    3,	// e
+    4	// f
+  };
+  return count4[v & 0xf] + count4[(v >> 4) & 0xf];
+}
+
+#else
+
+static unsigned char
+count_bits8 (unsigned char v)
+{
+  unsigned char count = 0;
+  if (v & (1 << 0)) count++;
+  if (v & (1 << 1)) count++;
+  if (v & (1 << 2)) count++;
+  if (v & (1 << 3)) count++;
+  if (v & (1 << 4)) count++;
+  if (v & (1 << 5)) count++;
+  if (v & (1 << 6)) count++;
+  if (v & (1 << 7)) count++;
+  return count;
+}
+#endif
+
+static void
+write_byte_msb (unsigned char v);
+
+unsigned char
+transact_byte_msb (unsigned char v);
+
+static void
+write_bytes_msb (const xdata unsigned char *buf, unsigned char len);
+
+static void
+read_bytes_msb (xdata unsigned char *buf, unsigned char len);
+
+static void
+transact_bytes_msb (xdata unsigned char *buf, unsigned char len);
+
+// returns non-zero if successful, else 0
+unsigned char
+spi_read (unsigned char header_hi, unsigned char header_lo,
+	  unsigned char enables, unsigned char format,
+	  xdata unsigned char *buf, unsigned char len)
+{
+  if (count_bits8 (enables) > 1)
+    return 0;		// error, too many enables set
+
+  setup_enables (enables);
+
+  if (format & SPI_FMT_LSB){		// order: LSB
+#if 1
+    return 0;		// error, not implemented
+#else
+    switch (format & SPI_FMR_HDR_MASK){
+    case SPI_FMT_HDR_0:
+      break;
+    case SPI_FMT_HDR_1:
+      write_byte_lsb (header_lo);
+      break;
+    case SPI_FMT_HDR_2:
+      write_byte_lsb (header_lo);
+      write_byte_lsb (header_hi);
+      break;
+    default:
+      return 0;		// error
+    }
+    if (len != 0)
+      read_bytes_lsb (buf, len);
+#endif
+  }
+
+  else {		// order: MSB
+
+    switch (format & SPI_FMT_HDR_MASK){
+    case SPI_FMT_HDR_0:
+      break;
+    case SPI_FMT_HDR_1:
+      write_byte_msb (header_lo);
+      break;
+    case SPI_FMT_HDR_2:
+      write_byte_msb (header_hi);
+      write_byte_msb (header_lo);
+      break;
+    default:
+      return 0;		// error
+    }
+    if (len != 0)
+      read_bytes_msb (buf, len);
+  }
+
+  disable_all ();
+  return 1;		// success
+}
+
+
+// returns non-zero if successful, else 0
+unsigned char
+spi_write (unsigned char header_hi, unsigned char header_lo,
+	   unsigned char enables, unsigned char format,
+	   const xdata unsigned char *buf, unsigned char len)
+{
+  setup_enables (enables);
+
+  if (format & SPI_FMT_LSB){		// order: LSB
+#if 1
+    return 0;		// error, not implemented
+#else
+    switch (format & SPI_FMR_HDR_MASK){
+    case SPI_FMT_HDR_0:
+      break;
+    case SPI_FMT_HDR_1:
+      write_byte_lsb (header_lo);
+      break;
+    case SPI_FMT_HDR_2:
+      write_byte_lsb (header_lo);
+      write_byte_lsb (header_hi);
+      break;
+    default:
+      return 0;		// error
+    }
+    if (len != 0)
+      write_bytes_lsb (buf, len);
+#endif
+  }
+
+  else {		// order: MSB
+
+    switch (format & SPI_FMT_HDR_MASK){
+    case SPI_FMT_HDR_0:
+      break;
+    case SPI_FMT_HDR_1:
+      write_byte_msb (header_lo);
+      break;
+    case SPI_FMT_HDR_2:
+      write_byte_msb (header_hi);
+      write_byte_msb (header_lo);
+      break;
+    default:
+      return 0;		// error
+    }
+    if (len != 0)
+      write_bytes_msb (buf, len);
+  }
+
+  disable_all ();
+  return 1;		// success
+}
+
+unsigned char
+spi_transact (unsigned char data0, unsigned char data1,
+              unsigned char data2, unsigned char data3,
+              unsigned char enables, xdata unsigned char *buf,
+              unsigned char len)
+{
+  if (count_bits8 (enables) > 1)
+    return 0;		// error, too many enables set
+
+  if (len > 4)
+    return 0;
+
+  setup_enables (enables);
+
+  buf[0] = data0;
+  buf[1] = data1;
+  buf[2] = data2; 
+  buf[3] = data3; 
+
+  if (len != 0)
+    transact_bytes_msb(buf, len);
+
+  disable_all ();
+  return 1;		// success
+}
+
+static unsigned char 
+transact_byte_msb (unsigned char v)
+{
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;                 // read into bottom bit
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  return v;
+}
+
+static void
+transact_bytes_msb (xdata unsigned char *buf, unsigned char len)
+{
+  while (len-- != 0){
+    *buf++ = transact_byte_msb (*buf);
+  }
+}
+
+static void
+write_byte_msb (unsigned char v)
+{
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+
+  v = (v << 1) | (v >> 7);	// rotate left (MSB into bottom bit)
+  bitS_OUT = v & 0x1;
+  bitS_CLK = 1;
+  bitS_CLK = 0;
+}
+
+static void
+write_bytes_msb (const xdata unsigned char *buf, unsigned char len)
+{
+  while (len-- != 0){
+    write_byte_msb (*buf++);
+  }
+}
+
+#if 0
+/*
+ * This is incorrectly compiled by SDCC 2.4.0
+ */
+static unsigned char
+read_byte_msb (void)
+{
+  unsigned char v = 0;
+
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  v = v << 1;
+  bitS_CLK = 1;
+  v |= bitS_IN;
+  bitS_CLK = 0;
+
+  return v;
+}
+#else
+static unsigned char
+read_byte_msb (void) _naked
+{
+  _asm
+	clr	a
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	setb	_bitS_CLK
+        mov	c, _bitS_IN
+	rlc	a
+	clr	_bitS_CLK
+
+	mov	dpl,a
+	ret
+  _endasm;
+}
+#endif
+
+static void
+read_bytes_msb (xdata unsigned char *buf, unsigned char len)
+{
+  while (len-- != 0){
+    *buf++ = read_byte_msb ();
+  }
+}
+
diff --git a/firmware/fx2/src/usrp1/spi.h b/firmware/fx2/src/usrp1/spi.h
new file mode 100644
index 000000000..5342b82b8
--- /dev/null
+++ b/firmware/fx2/src/usrp1/spi.h
@@ -0,0 +1,50 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_SPI_H
+#define INCLUDED_SPI_H
+
+#include "usrp_spi_defs.h"
+
+void init_spi (void);		// one time call to init
+
+// returns non-zero if successful, else 0
+unsigned char
+spi_read (unsigned char header_hi, unsigned char header_lo,
+	  unsigned char enables, unsigned char format,
+	  xdata unsigned char *buf, unsigned char len);
+
+// returns non-zero if successful, else 0
+unsigned char
+spi_write (unsigned char header_hi, unsigned char header_lo,
+	   unsigned char enables, unsigned char format,
+	   const xdata unsigned char *buf, unsigned char len);
+
+// returns non-zero if successful, else 0
+unsigned char
+spi_transact (unsigned char data0, unsigned char data1,
+              unsigned char data2, unsigned char data3,
+	      unsigned char enables, xdata unsigned char *buf,
+              unsigned char len);
+
+
+#endif /* INCLUDED_SPI_H */
diff --git a/firmware/fx2/src/usrp1/usb_descriptors.a51 b/firmware/fx2/src/usrp1/usb_descriptors.a51
new file mode 100644
index 000000000..a60adbef8
--- /dev/null
+++ b/firmware/fx2/src/usrp1/usb_descriptors.a51
@@ -0,0 +1,404 @@
+;;; -*- asm -*-
+;;;
+;;; Copyright 2003 Free Software Foundation, Inc.
+;;; 
+;;; This file is part of GNU Radio
+;;; 
+;;; GNU Radio is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3, or (at your option)
+;;; any later version.
+;;; 
+;;; GNU Radio is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;; 
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Radio; see the file COPYING.  If not, write to
+;;; the Free Software Foundation, Inc., 51 Franklin Street,
+;;; Boston, MA 02110-1301, USA.
+;;;
+	
+;;; USB Descriptor table for the USRP
+;;; 
+;;; We're a high-speed only device (480 Mb/sec) with 1 configuration
+;;; and 3 interfaces.  
+;;; 
+;;;	interface 0:	command and status (ep0 COMMAND)
+;;;	interface 1:	Transmit path (ep2 OUT BULK)
+;;;	interface 2:	Receive path (ep6 IN BULK)
+
+	.module usb_descriptors
+	
+	VID_FREE	 = 0xfffe	; Free Software Folks
+	PID_USRP	 = 0x0002	; USRP
+
+	;; We distinguish configured from unconfigured USRPs using the Device ID.
+	;; If the MSB of the DID is 0, the device is unconfigured.
+	;; The LSB of the DID is reserved for hardware revs.
+	
+	DID_USRP	 = 0x0100	; Device ID (bcd)
+
+	
+	DSCR_DEVICE	 =   1	; Descriptor type: Device
+	DSCR_CONFIG	 =   2	; Descriptor type: Configuration
+	DSCR_STRING	 =   3	; Descriptor type: String
+	DSCR_INTRFC	 =   4	; Descriptor type: Interface
+	DSCR_ENDPNT	 =   5	; Descriptor type: Endpoint
+	DSCR_DEVQUAL	 =   6	; Descriptor type: Device Qualifier
+	
+	DSCR_DEVICE_LEN	 =  18
+	DSCR_CONFIG_LEN  =   9
+	DSCR_INTRFC_LEN  =   9
+	DSCR_ENDPNT_LEN  =   7
+	DSCR_DEVQUAL_LEN =  10
+	
+	ET_CONTROL	 =   0	; Endpoint type: Control
+	ET_ISO		 =   1	; Endpoint type: Isochronous
+	ET_BULK		 =   2	; Endpoint type: Bulk
+	ET_INT		 =   3	; Endpoint type: Interrupt
+	
+	
+	;; configuration attributes
+	bmSELF_POWERED	=	1 << 6
+
+;;; --------------------------------------------------------
+;;;	external ram data
+;;;--------------------------------------------------------
+	
+	.area USBDESCSEG    (XDATA)
+	
+;;; ----------------------------------------------------------------
+;;; descriptors used when operating at high speed (480Mb/sec)
+;;; ----------------------------------------------------------------
+	
+	.even	; descriptors must be 2-byte aligned for SUDPTR{H,L} to work
+
+	;; The .even directive isn't really honored by the linker.  Bummer!
+	;; (There's no way to specify an alignment requirement for a given area,
+	;; hence when they're concatenated together, even doesn't work.)
+	;; 
+	;; We work around this by telling the linker to put USBDESCSEG
+	;; at 0xE000 absolute.  This means that the maximimum length of this
+	;; segment is 480 bytes, leaving room for the two hash slots 
+	;; at 0xE1EO to 0xE1FF.  
+	;; 
+	;; As of July 7, 2004, this segment is 326 bytes long
+	
+_high_speed_device_descr::
+	.db	DSCR_DEVICE_LEN
+	.db	DSCR_DEVICE
+	.db	<0x0200		; Specification version (LSB)
+	.db	>0x0200		; Specification version (MSB)
+	.db	0xff		; device class (vendor specific)
+	.db	0xff		; device subclass (vendor specific)
+	.db	0xff		; device protocol (vendor specific)
+	.db	64		; bMaxPacketSize0 for endpoint 0
+	.db	<VID_FREE	; idVendor
+	.db	>VID_FREE	; idVendor
+	.db	<PID_USRP	; idProduct
+	.db	>PID_USRP	; idProduct
+_usb_desc_hw_rev_binary_patch_location_0::
+	.db	<DID_USRP	; bcdDevice
+	.db	>DID_USRP	; bcdDevice
+	.db	SI_VENDOR	; iManufacturer (string index)
+	.db	SI_PRODUCT	; iProduct (string index)
+	.db	SI_SERIAL	; iSerial number (string index)
+	.db	1		; bNumConfigurations
+	
+;;; describes the other speed (12Mb/sec)
+	.even
+_high_speed_devqual_descr::
+	.db	DSCR_DEVQUAL_LEN
+	.db	DSCR_DEVQUAL
+	.db	<0x0200		; bcdUSB (LSB)
+	.db	>0x0200		; bcdUSB (MSB)
+	.db	0xff		; bDeviceClass
+	.db	0xff		; bDeviceSubClass
+	.db	0xff		; bDeviceProtocol
+	.db	64		; bMaxPacketSize0
+	.db	1		; bNumConfigurations (one config at 12Mb/sec)
+	.db	0		; bReserved
+	
+	.even
+_high_speed_config_descr::	
+	.db	DSCR_CONFIG_LEN
+	.db	DSCR_CONFIG
+	.db	<(_high_speed_config_descr_end - _high_speed_config_descr) ; LSB
+	.db	>(_high_speed_config_descr_end - _high_speed_config_descr) ; MSB
+	.db	3		; bNumInterfaces
+	.db	1		; bConfigurationValue
+	.db	0		; iConfiguration
+	.db	0x80 | bmSELF_POWERED ; bmAttributes
+	.db	0		; bMaxPower
+
+	;; interface descriptor 0 (command & status, ep0 COMMAND)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	0		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	0		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_COMMAND_AND_STATUS	; iInterface (description)
+
+	;; interface descriptor 1 (transmit path, ep2 OUT BULK)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	1		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	1		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_TX_PATH	; iInterface (description)
+
+	;; interface 1's end point
+
+	.db	DSCR_ENDPNT_LEN
+	.db	DSCR_ENDPNT
+	.db	0x02		; bEndpointAddress (ep 2 OUT)
+	.db	ET_BULK		; bmAttributes
+	.db	<512		; wMaxPacketSize (LSB)
+	.db	>512		; wMaxPacketSize (MSB)
+	.db	0		; bInterval (iso only)
+
+	;; interface descriptor 2 (receive path, ep6 IN BULK)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	2		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	1		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_RX_PATH	; iInterface (description)
+
+	;; interface 2's end point
+
+	.db	DSCR_ENDPNT_LEN
+	.db	DSCR_ENDPNT
+	.db	0x86		; bEndpointAddress (ep 6 IN)
+	.db	ET_BULK		; bmAttributes
+	.db	<512		; wMaxPacketSize (LSB)
+	.db	>512		; wMaxPacketSize (MSB)
+	.db	0		; bInterval (iso only)
+
+_high_speed_config_descr_end:		
+
+;;; ----------------------------------------------------------------
+;;; descriptors used when operating at full speed (12Mb/sec)
+;;; ----------------------------------------------------------------
+
+	.even
+_full_speed_device_descr::	
+	.db	DSCR_DEVICE_LEN
+	.db	DSCR_DEVICE
+	.db	<0x0200		; Specification version (LSB)
+	.db	>0x0200		; Specification version (MSB)
+	.db	0xff		; device class (vendor specific)
+	.db	0xff		; device subclass (vendor specific)
+	.db	0xff		; device protocol (vendor specific)
+	.db	64		; bMaxPacketSize0 for endpoint 0
+	.db	<VID_FREE	; idVendor
+	.db	>VID_FREE	; idVendor
+	.db	<PID_USRP	; idProduct
+	.db	>PID_USRP	; idProduct
+_usb_desc_hw_rev_binary_patch_location_1::
+	.db	<DID_USRP	; bcdDevice
+	.db	>DID_USRP	; bcdDevice
+	.db	SI_VENDOR	; iManufacturer (string index)
+	.db	SI_PRODUCT	; iProduct (string index)
+	.db	SI_NONE		; iSerial number (None)
+	.db	1		; bNumConfigurations
+	
+	
+;;; describes the other speed (480Mb/sec)
+	.even
+_full_speed_devqual_descr::
+	.db	DSCR_DEVQUAL_LEN
+	.db	DSCR_DEVQUAL
+	.db	<0x0200		; bcdUSB
+	.db	>0x0200		; bcdUSB
+	.db	0xff		; bDeviceClass
+	.db	0xff		; bDeviceSubClass
+	.db	0xff		; bDeviceProtocol
+	.db	64		; bMaxPacketSize0
+	.db	1		; bNumConfigurations (one config at 480Mb/sec)
+	.db	0		; bReserved
+	
+	.even
+_full_speed_config_descr::	
+	.db	DSCR_CONFIG_LEN
+	.db	DSCR_CONFIG
+	.db	<(_full_speed_config_descr_end - _full_speed_config_descr) ; LSB
+	.db	>(_full_speed_config_descr_end - _full_speed_config_descr) ; MSB
+	.db	1		; bNumInterfaces
+	.db	1		; bConfigurationValue
+	.db	0		; iConfiguration
+	.db	0x80 | bmSELF_POWERED ; bmAttributes
+	.db	0		; bMaxPower
+
+	;; interface descriptor 0 (command & status, ep0 COMMAND)
+	
+	.db	DSCR_INTRFC_LEN
+	.db	DSCR_INTRFC
+	.db	0		; bInterfaceNumber (zero based)
+	.db	0		; bAlternateSetting
+	.db	0		; bNumEndpoints
+	.db	0xff		; bInterfaceClass (vendor specific)
+	.db	0xff		; bInterfaceSubClass (vendor specific)
+	.db	0xff		; bInterfaceProtocol (vendor specific)
+	.db	SI_COMMAND_AND_STATUS	; iInterface (description)
+	
+_full_speed_config_descr_end:	
+	
+;;; ----------------------------------------------------------------
+;;;			string descriptors
+;;; ----------------------------------------------------------------
+
+_nstring_descriptors::
+	.db	(_string_descriptors_end - _string_descriptors) / 2
+
+_string_descriptors::
+	.db	<str0, >str0
+	.db	<str1, >str1
+	.db	<str2, >str2
+	.db	<str3, >str3
+	.db	<str4, >str4
+	.db	<str5, >str5
+	.db	<str6, >str6
+_string_descriptors_end:
+
+	SI_NONE = 0
+	;; str0 contains the language ID's.
+	.even
+str0:	.db	str0_end - str0
+	.db	DSCR_STRING
+	.db	0
+	.db	0
+	.db	<0x0409		; magic code for US English (LSB)
+	.db	>0x0409		; magic code for US English (MSB)
+str0_end:
+
+	SI_VENDOR = 1
+	.even
+str1:	.db	str1_end - str1
+	.db	DSCR_STRING
+	.db	'F, 0		; 16-bit unicode
+	.db	'r, 0
+	.db	'e, 0
+	.db	'e, 0
+	.db	' , 0
+	.db	'S, 0
+	.db	'o, 0
+	.db	'f, 0
+	.db	't, 0
+	.db	'w, 0
+	.db	'a, 0
+	.db	'r, 0
+	.db	'e, 0
+	.db	' , 0
+	.db	'F, 0
+	.db	'o, 0
+	.db	'l, 0
+	.db	'k, 0
+	.db	's, 0
+str1_end:
+
+	SI_PRODUCT = 2
+	.even
+str2:	.db	str2_end - str2
+	.db	DSCR_STRING
+	.db	'U, 0
+	.db	'S, 0
+	.db	'R, 0
+	.db	'P, 0
+	.db	' , 0
+	.db	'R, 0
+	.db	'e, 0
+	.db	'v, 0
+	.db	' , 0
+_usb_desc_hw_rev_ascii_patch_location_0::
+	.db	'?, 0
+str2_end:
+
+	SI_COMMAND_AND_STATUS = 3
+	.even
+str3:	.db	str3_end - str3
+	.db	DSCR_STRING
+	.db	'C, 0
+	.db	'o, 0
+	.db	'm, 0
+	.db	'm, 0
+	.db	'a, 0
+	.db	'n, 0
+	.db	'd, 0
+	.db	' , 0
+	.db	'&, 0
+	.db	' , 0
+	.db	'S, 0
+	.db	't, 0
+	.db	'a, 0
+	.db	't, 0
+	.db	'u, 0
+	.db	's, 0
+str3_end:
+
+	SI_TX_PATH = 4
+	.even
+str4:	.db	str4_end - str4
+	.db	DSCR_STRING
+	.db	'T, 0
+	.db	'r, 0
+	.db	'a, 0
+	.db	'n, 0
+	.db	's, 0
+	.db	'm, 0
+	.db	'i, 0
+	.db	't, 0
+	.db	' , 0
+	.db	'P, 0
+	.db	'a, 0
+	.db	't, 0
+	.db	'h, 0
+str4_end:
+
+	SI_RX_PATH = 5
+	.even
+str5:	.db	str5_end - str5
+	.db	DSCR_STRING
+	.db	'R, 0
+	.db	'e, 0
+	.db	'c, 0
+	.db	'e, 0
+	.db	'i, 0
+	.db	'v, 0
+	.db	'e, 0
+	.db	' , 0
+	.db	'P, 0
+	.db	'a, 0
+	.db	't, 0
+	.db	'h, 0
+str5_end:
+
+	SI_SERIAL = 6
+	.even
+str6:	.db	str6_end - str6
+	.db	DSCR_STRING
+_usb_desc_serial_number_ascii::
+	.db	'3, 0
+	.db	'., 0
+	.db	'1, 0
+	.db	'4, 0
+	.db	'1, 0
+	.db	'5, 0
+	.db	'9, 0
+	.db	'3, 0
+str6_end:
+
diff --git a/firmware/fx2/src/usrp1/usrp_common.c b/firmware/fx2/src/usrp1/usrp_common.c
new file mode 100644
index 000000000..f389d9253
--- /dev/null
+++ b/firmware/fx2/src/usrp1/usrp_common.c
@@ -0,0 +1 @@
+#include "../common/usrp_common.c"
diff --git a/firmware/fx2/src/usrp1/usrp_common.h b/firmware/fx2/src/usrp1/usrp_common.h
new file mode 100644
index 000000000..738ba6b37
--- /dev/null
+++ b/firmware/fx2/src/usrp1/usrp_common.h
@@ -0,0 +1,77 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003,2006 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+/*
+ * common defines and prototypes for USRP
+ *
+ * In comments below "TRM" refers to the EZ-USB FX2 Technical Reference Manual
+ */
+
+#ifndef _USRPCOMMON_H_
+#define _USRPCOMMON_H_
+
+#include <usrp_config.h>
+#include <usrp_rev2_regs.h>
+#include <syncdelay.h>
+
+/*
+ * From TRM page 15-105:
+ *
+ * Under certain conditions, some read and write access to the FX2
+ * registers must be separated by a "synchronization delay".  The
+ * delay is necessary only under the following conditions:
+ *
+ *   - between a write to any register in the 0xE600 - 0xE6FF range 
+ *     and a write to one of the registers listed below.
+ *
+ *   - between a write to one of the registers listed below and a read 
+ *     from any register in the 0xE600 - 0xE6FF range.
+ *
+ *   Registers which require a synchronization delay:
+ *
+ *	FIFORESET			FIFOPINPOLAR
+ *	INPKTEND			EPxBCH:L
+ *	EPxFIFOPFH:L			EPxAUTOINLENH:L
+ *	EPxFIFOCFG			EPxGPIFFLGSEL
+ *	PINFLAGSAB			PINFLAGSCD
+ *	EPxFIFOIE			EPxFIFOIRQ
+ *	GPIFIE				GPIFIRQ
+ *	UDMACRCH:L			GPIFADRH:L
+ *	GPIFTRIG			EPxGPIFTRIG
+ *	OUTPKTEND			REVCTL
+ *	GPIFTCB3			GPIFTCB2
+ *	GPIFTCB1			GPIFTCB0
+ */
+
+#define	TRUE		1
+#define	FALSE		0
+
+
+void init_usrp (void);
+void init_gpif (void);
+
+void set_led_0 (unsigned char on);
+void set_led_1 (unsigned char on);
+void toggle_led_0 (void);
+void toggle_led_1 (void);
+
+#define la_trace(v)
+
+#endif /* _USRPCOMMON_H_ */
diff --git a/firmware/fx2/src/usrp1/usrp_main.c b/firmware/fx2/src/usrp1/usrp_main.c
new file mode 100644
index 000000000..b8c2e98ec
--- /dev/null
+++ b/firmware/fx2/src/usrp1/usrp_main.c
@@ -0,0 +1,388 @@
+/* 
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003,2004 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+#include "usrp_common.h"
+#include "usrp_commands.h"
+#include "fpga.h"
+#include "usrp_gpif_inline.h"
+#include "timer.h"
+#include "i2c.h"
+#include "isr.h"
+#include "usb_common.h"
+#include "fx2utils.h"
+#include "usrp_globals.h"
+#include "usrp_i2c_addr.h"
+#include <string.h>
+#include "spi.h"
+#include "eeprom_io.h"
+#include "usb_descriptors.h"
+
+/*
+ * offsets into boot eeprom for configuration values
+ */
+#define	HW_REV_OFFSET		  5
+#define SERIAL_NO_OFFSET	248
+#define SERIAL_NO_LEN		  8
+
+
+#define	bRequestType	SETUPDAT[0]
+#define	bRequest	SETUPDAT[1]
+#define	wValueL		SETUPDAT[2]
+#define	wValueH		SETUPDAT[3]
+#define	wIndexL		SETUPDAT[4]
+#define	wIndexH		SETUPDAT[5]
+#define	wLengthL	SETUPDAT[6]
+#define	wLengthH	SETUPDAT[7]
+
+
+unsigned char g_tx_enable = 0;
+unsigned char g_rx_enable = 0;
+unsigned char g_rx_overrun = 0;
+unsigned char g_tx_underrun = 0;
+
+/*
+ * the host side fpga loader code pushes an MD5 hash of the bitstream
+ * into hash1.
+ */
+#define	  USRP_HASH_SIZE      16
+xdata at USRP_HASH_SLOT_1_ADDR unsigned char hash1[USRP_HASH_SIZE];
+
+static void
+get_ep0_data (void)
+{
+  EP0BCL = 0;			// arm EP0 for OUT xfer.  This sets the busy bit
+
+  while (EP0CS & bmEPBUSY)	// wait for busy to clear
+    ;
+}
+
+/*
+ * Handle our "Vendor Extension" commands on endpoint 0.
+ * If we handle this one, return non-zero.
+ */
+unsigned char
+app_vendor_cmd (void)
+{
+  if (bRequestType == VRT_VENDOR_IN){
+
+    /////////////////////////////////
+    //    handle the IN requests
+    /////////////////////////////////
+
+    switch (bRequest){
+
+    case VRQ_GET_STATUS:
+      switch (wIndexL){
+
+      case GS_TX_UNDERRUN:
+	EP0BUF[0] = g_tx_underrun;
+	g_tx_underrun = 0;
+	EP0BCH = 0;
+	EP0BCL = 1;
+	break;
+
+      case GS_RX_OVERRUN:
+	EP0BUF[0] = g_rx_overrun;
+	g_rx_overrun = 0;
+	EP0BCH = 0;
+	EP0BCL = 1;
+	break;
+
+      default:
+	return 0;
+      }
+      break;
+
+    case VRQ_I2C_READ:
+      if (!i2c_read (wValueL, EP0BUF, wLengthL))
+	return 0;
+
+      EP0BCH = 0;
+      EP0BCL = wLengthL;
+      break;
+
+    case VRQ_SPI_READ:
+      if (!spi_read (wValueH, wValueL, wIndexH, wIndexL, EP0BUF, wLengthL))
+	return 0;
+
+      EP0BCH = 0;
+      EP0BCL = wLengthL;
+      break;
+
+    case VRQ_SPI_TRANSACT:
+      if (!spi_transact (wValueH, wValueL, wIndexH, wIndexL, wLengthH, EP0BUF, wLengthL))
+	return 0;
+
+      EP0BCH = 0;
+      EP0BCL = wLengthL;
+      break;
+
+    default:
+      return 0;
+    }
+  }
+
+  else if (bRequestType == VRT_VENDOR_OUT){
+
+    /////////////////////////////////
+    //    handle the OUT requests
+    /////////////////////////////////
+
+    switch (bRequest){
+
+    case VRQ_SET_LED:
+      switch (wIndexL){
+      case 0:
+	set_led_0 (wValueL);
+	break;
+	
+      case 1:
+	set_led_1 (wValueL);
+	break;
+	
+      default:
+	return 0;
+      }
+      break;
+      
+    case VRQ_FPGA_LOAD:
+      switch (wIndexL){			// sub-command
+      case FL_BEGIN:
+	return fpga_load_begin ();
+	
+      case FL_XFER:
+	get_ep0_data ();
+	return fpga_load_xfer (EP0BUF, EP0BCL);
+	
+      case FL_END:
+	return fpga_load_end ();
+	
+      default:
+	return 0;
+      }
+      break;
+      
+
+    case VRQ_FPGA_SET_RESET:
+      fpga_set_reset (wValueL);
+      break;
+      
+    case VRQ_FPGA_SET_TX_ENABLE:
+      fpga_set_tx_enable (wValueL);
+      break;
+      
+    case VRQ_FPGA_SET_RX_ENABLE:
+      fpga_set_rx_enable (wValueL);
+      break;
+
+    case VRQ_FPGA_SET_TX_RESET:
+      fpga_set_tx_reset (wValueL);
+      break;
+      
+    case VRQ_FPGA_SET_RX_RESET:
+      fpga_set_rx_reset (wValueL);
+      break;
+
+    case VRQ_I2C_WRITE:
+      get_ep0_data ();
+      if (!i2c_write (wValueL, EP0BUF, EP0BCL))
+	return 0;
+      break;
+
+    case VRQ_SPI_WRITE:
+      get_ep0_data ();
+      if (!spi_write (wValueH, wValueL, wIndexH, wIndexL, EP0BUF, EP0BCL))
+	return 0;
+      break;
+
+    default:
+      return 0;
+    }
+
+  }
+  else
+    return 0;    // invalid bRequestType
+
+  return 1;
+}
+
+
+
+static void
+main_loop (void)
+{
+  setup_flowstate_common ();
+
+  while (1){
+
+    if (usb_setup_packet_avail ())
+      usb_handle_setup_packet ();
+    
+  
+    if (GPIFTRIG & bmGPIF_IDLE){
+
+      // OK, GPIF is idle.  Let's try to give it some work.
+
+      // First check for underruns and overruns
+
+      if (UC_BOARD_HAS_FPGA && (USRP_PA & (bmPA_TX_UNDERRUN | bmPA_RX_OVERRUN))){
+      
+	// record the under/over run
+	if (USRP_PA & bmPA_TX_UNDERRUN)
+	  g_tx_underrun = 1;
+
+	if (USRP_PA & bmPA_RX_OVERRUN)
+	  g_rx_overrun = 1;
+
+	// tell the FPGA to clear the flags
+	fpga_clear_flags ();
+      }
+
+      // Next see if there are any "OUT" packets waiting for our attention,
+      // and if so, if there's room in the FPGA's FIFO for them.
+
+      if (g_tx_enable && !(EP24FIFOFLGS & 0x02)){  // USB end point fifo is not empty...
+
+	if (fpga_has_room_for_packet ()){	   // ... and FPGA has room for packet
+
+	  GPIFTCB1 = 0x01;	SYNCDELAY;
+	  GPIFTCB0 = 0x00;	SYNCDELAY;
+
+	  setup_flowstate_write ();
+
+	  SYNCDELAY;
+	  GPIFTRIG = bmGPIF_EP2_START | bmGPIF_WRITE; 	// start the xfer
+	  SYNCDELAY;
+
+	  while (!(GPIFTRIG & bmGPIF_IDLE)){
+	    // wait for the transaction to complete
+	  }
+	}
+      }
+
+      // See if there are any requests for "IN" packets, and if so
+      // whether the FPGA's got any packets for us.
+
+      if (g_rx_enable && !(EP6CS & bmEPFULL)){	// USB end point fifo is not full...
+
+	if (fpga_has_packet_avail ()){		// ... and FPGA has packet available
+
+	  GPIFTCB1 = 0x01;	SYNCDELAY;
+	  GPIFTCB0 = 0x00;	SYNCDELAY;
+
+	  setup_flowstate_read ();
+
+	  SYNCDELAY;
+	  GPIFTRIG = bmGPIF_EP6_START | bmGPIF_READ; 	// start the xfer
+	  SYNCDELAY;
+
+	  while (!(GPIFTRIG & bmGPIF_IDLE)){
+	    // wait for the transaction to complete
+	  }
+
+	  SYNCDELAY;
+	  INPKTEND = 6;	// tell USB we filled buffer (6 is our endpoint num)
+	}
+      }
+    }
+  }
+}
+
+
+/*
+ * called at 100 Hz from timer2 interrupt
+ *
+ * Toggle led 0
+ */
+void
+isr_tick (void) interrupt
+{
+  static unsigned char	count = 1;
+  
+  if (--count == 0){
+    count = 50;
+    USRP_LED_REG ^= bmLED0;
+  }
+
+  clear_timer_irq ();
+}
+
+/*
+ * Read h/w rev code and serial number out of boot eeprom and
+ * patch the usb descriptors with the values.
+ */
+void
+patch_usb_descriptors(void)
+{
+  static xdata unsigned char hw_rev;
+  static xdata unsigned char serial_no[8];
+  unsigned char i;
+
+  eeprom_read(I2C_ADDR_BOOT, HW_REV_OFFSET, &hw_rev, 1);	// LSB of device id
+  usb_desc_hw_rev_binary_patch_location_0[0] = hw_rev;
+  usb_desc_hw_rev_binary_patch_location_1[0] = hw_rev;
+  usb_desc_hw_rev_ascii_patch_location_0[0] = hw_rev + '0';     // FIXME if we get > 9
+
+  eeprom_read(I2C_ADDR_BOOT, SERIAL_NO_OFFSET, serial_no, SERIAL_NO_LEN);
+
+  for (i = 0; i < SERIAL_NO_LEN; i++){
+    unsigned char ch = serial_no[i];
+    if (ch == 0xff)	// make unprogrammed EEPROM default to '0'
+      ch = '0';
+    usb_desc_serial_number_ascii[i << 1] = ch;
+  }
+}
+
+void
+main (void)
+{
+#if 0
+  g_rx_enable = 0;	// FIXME (work around initialization bug)
+  g_tx_enable = 0;
+  g_rx_overrun = 0;
+  g_tx_underrun = 0;
+#endif
+
+  memset (hash1, 0, USRP_HASH_SIZE);	// zero fpga bitstream hash.  This forces reload
+  
+  init_usrp ();
+  init_gpif ();
+  
+  // if (UC_START_WITH_GSTATE_OUTPUT_ENABLED)
+  IFCONFIG |= bmGSTATE;			// no conflict, start with it on
+
+  set_led_0 (0);
+  set_led_1 (0);
+  
+  EA = 0;		// disable all interrupts
+
+  patch_usb_descriptors();
+
+  setup_autovectors ();
+  usb_install_handlers ();
+  hook_timer_tick ((unsigned short) isr_tick);
+
+  EIEX4 = 1;		// disable INT4 FIXME
+  EA = 1;		// global interrupt enable
+
+  fx2_renumerate ();	// simulates disconnect / reconnect
+
+  main_loop ();
+}
diff --git a/firmware/fx2/src/usrp1/usrp_rev2_regs.h b/firmware/fx2/src/usrp1/usrp_rev2_regs.h
new file mode 100644
index 000000000..a4f1d9896
--- /dev/null
+++ b/firmware/fx2/src/usrp1/usrp_rev2_regs.h
@@ -0,0 +1,163 @@
+/*
+ * USRP - Universal Software Radio Peripheral
+ *
+ * Copyright (C) 2003 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+ */
+
+/*
+ * These are the register definitions for the Rev 1 USRP prototype
+ * The Rev 1 is the version with the AD9862's and daughterboards
+ */
+
+#ifndef _USRP_REV1_REGS_H_
+#define _USRP_REV1_REGS_H_
+
+#include "fx2regs.h"
+
+/*
+ * Port A (bit addressable):
+ */
+
+#define USRP_PA			IOA		// Port A
+#define	USRP_PA_OE		OEA		// Port A direction register
+
+#define bmPA_S_CLK		bmBIT0		// SPI serial clock
+#define	bmPA_S_DATA_TO_PERIPH	bmBIT1		// SPI SDI (peripheral rel name)
+#define bmPA_S_DATA_FROM_PERIPH	bmBIT2		// SPI SDO (peripheral rel name)
+#define bmPA_SEN_FPGA		bmBIT3		// serial enable for FPGA (active low)
+#define	bmPA_SEN_CODEC_A	bmBIT4		// serial enable AD9862 A (active low)
+#define	bmPA_SEN_CODEC_B	bmBIT5		// serial enable AD9862 B (active low)
+//#define bmPA_FX2_2		bmBIT6		// misc pin to FPGA (overflow)
+//#define bmPA_FX2_3		bmBIT7		// misc pin to FPGA (underflow)
+#define	bmPA_RX_OVERRUN		bmBIT6		// misc pin to FPGA (overflow)
+#define	bmPA_TX_UNDERRUN	bmBIT7		// misc pin to FPGA (underflow)
+
+
+sbit at 0x80+0 bitS_CLK;		// 0x80 is the bit address of PORT A
+sbit at 0x80+1 bitS_OUT;		// out from FX2 point of view
+sbit at 0x80+2 bitS_IN;			// in from FX2 point of view
+
+
+/* all outputs except S_DATA_FROM_PERIPH, FX2_2, FX2_3 */
+
+#define	bmPORT_A_OUTPUTS  (bmPA_S_CLK			\
+			   | bmPA_S_DATA_TO_PERIPH	\
+			   | bmPA_SEN_FPGA		\
+			   | bmPA_SEN_CODEC_A		\
+			   | bmPA_SEN_CODEC_B		\
+			   )
+
+#define	bmPORT_A_INITIAL   (bmPA_SEN_FPGA | bmPA_SEN_CODEC_A | bmPA_SEN_CODEC_B)
+
+
+/* Port B: GPIF	FD[7:0]			*/
+
+/*
+ * Port C (bit addressable):
+ *    5:1 FPGA configuration
+ */
+
+#define	USRP_PC			IOC		// Port C
+#define	USRP_PC_OE		OEC		// Port C direction register
+
+#define	USRP_ALTERA_CONFIG	USRP_PC
+
+#define	bmPC_nRESET		bmBIT0		// reset line to codecs (active low)
+#define bmALTERA_DATA0		bmBIT1
+#define bmALTERA_NCONFIG	bmBIT2
+#define bmALTERA_DCLK		bmBIT3
+#define bmALTERA_CONF_DONE	bmBIT4
+#define bmALTERA_NSTATUS	bmBIT5
+#define	bmPC_LED0		bmBIT6		// active low
+#define	bmPC_LED1		bmBIT7		// active low
+
+sbit at 0xA0+1 bitALTERA_DATA0;		// 0xA0 is the bit address of PORT C
+sbit at 0xA0+3 bitALTERA_DCLK;
+
+
+#define	bmALTERA_BITS		(bmALTERA_DATA0			\
+				 | bmALTERA_NCONFIG		\
+				 | bmALTERA_DCLK		\
+				 | bmALTERA_CONF_DONE		\
+				 | bmALTERA_NSTATUS)
+
+#define	bmPORT_C_OUTPUTS	(bmPC_nRESET			\
+				 | bmALTERA_DATA0 		\
+				 | bmALTERA_NCONFIG		\
+				 | bmALTERA_DCLK		\
+				 | bmPC_LED0			\
+				 | bmPC_LED1			\
+				 )
+
+#define	bmPORT_C_INITIAL	(bmPC_LED0 | bmPC_LED1)
+
+
+#define	USRP_LED_REG		USRP_PC
+#define	bmLED0			bmPC_LED0
+#define	bmLED1			bmPC_LED1
+
+
+/* Port D: GPIF	FD[15:8]		*/
+
+/* Port E: not bit addressible		*/
+
+#define	USRP_PE			IOE		// Port E
+#define	USRP_PE_OE		OEE		// Port E direction register
+
+#define bmPE_PE0		bmBIT0		// GPIF debug output
+#define	bmPE_PE1		bmBIT1		// GPIF debug output
+#define	bmPE_PE2		bmBIT2		// GPIF debug output
+#define	bmPE_FPGA_CLR_STATUS	bmBIT3		// misc pin to FPGA (clear status)
+#define	bmPE_SEN_TX_A		bmBIT4		// serial enable d'board TX A (active low)
+#define	bmPE_SEN_RX_A		bmBIT5		// serial enable d'board RX A (active low)
+#define	bmPE_SEN_TX_B		bmBIT6		// serial enable d'board TX B (active low)
+#define bmPE_SEN_RX_B		bmBIT7		// serial enable d'board RX B (active low)
+
+
+#define	bmPORT_E_OUTPUTS	(bmPE_FPGA_CLR_STATUS	\
+				 | bmPE_SEN_TX_A 	\
+				 | bmPE_SEN_RX_A	\
+				 | bmPE_SEN_TX_B	\
+				 | bmPE_SEN_RX_B	\
+				 )
+
+
+#define	bmPORT_E_INITIAL	(bmPE_SEN_TX_A 		\
+				 | bmPE_SEN_RX_A	\
+				 | bmPE_SEN_TX_B	\
+				 | bmPE_SEN_RX_B	\
+				 )
+
+/*
+ * FPGA output lines that are tied to FX2 RDYx inputs.
+ * These are readable using GPIFREADYSTAT.
+ */
+#define	bmFPGA_HAS_SPACE		bmBIT0	// usbrdy[0] has room for 512 byte packet
+#define	bmFPGA_PKT_AVAIL		bmBIT1	// usbrdy[1] has >= 512 bytes available
+// #define	bmTX_UNDERRUN			bmBIT2  // usbrdy[2] D/A ran out of data
+// #define	bmRX_OVERRUN			bmBIT3	// usbrdy[3] A/D ran out of buffer
+
+/*
+ * FPGA input lines that are tied to the FX2 CTLx outputs.
+ *
+ * These are controlled by the GPIF microprogram...
+ */
+// WR					bmBIT0	// usbctl[0]
+// RD					bmBIT1	// usbctl[1]
+// OE					bmBIT2	// usbctl[2]
+
+#endif /* _USRP_REV1_REGS_H_ */
diff --git a/firmware/fx2/src/usrp1/vectors.a51 b/firmware/fx2/src/usrp1/vectors.a51
new file mode 100644
index 000000000..fa579ba8a
--- /dev/null
+++ b/firmware/fx2/src/usrp1/vectors.a51
@@ -0,0 +1 @@
+	.include "../common/vectors.a51"
diff --git a/fpga/usrp2/sdr_lib/dsp_core_rx.v b/fpga/usrp2/sdr_lib/dsp_core_rx.v
index 1e689fc7f..1318809d6 100644
--- a/fpga/usrp2/sdr_lib/dsp_core_rx.v
+++ b/fpga/usrp2/sdr_lib/dsp_core_rx.v
@@ -57,41 +57,32 @@ module dsp_core_rx
      (.clk(clk),.rst(rst),.set_stb(set_stb),.set_addr(set_addr),.set_data(set_data),
       .adc_in(adc_b),.adc_out(adc_b_ofs));
 
-   wire [3:0]  muxctrl;
-   setting_reg #(.my_addr(BASE+5)) sr_8
+   wire [7:0]  muxctrl;
+   setting_reg #(.my_addr(BASE+5), .width(8)) sr_8
      (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
       .in(set_data),.out({UNUSED_2,muxctrl}),.changed());
 
    wire [1:0] gpio_ena;
-   setting_reg #(.my_addr(BASE+6)) sr_9
+   setting_reg #(.my_addr(BASE+6), .width(2)) sr_9
      (.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
       .in(set_data),.out({UNUSED_3,gpio_ena}),.changed());
 
-   // The TVRX connects to what is called adc_b, thus A and B are
-   // swapped throughout the design.
-   //
-   // In the interest of expediency and keeping the s/w sane, we just remap them here.
-   // The I & Q fields are mapped the same:
-   // 0 -> "the real A" (as determined by the TVRX)
-   // 1 -> "the real B"
-   // 2 -> const zero
-   
    always @(posedge clk)
-     case(muxctrl[1:0])		// The I mapping
-       0: adc_i <= adc_b_ofs;	// "the real A"
-       1: adc_i <= adc_a_ofs;
+     case(muxctrl[3:0])		// The I mapping
+       0: adc_i <= adc_a_ofs;
+       1: adc_i <= adc_b_ofs;
        2: adc_i <= 0;
        default: adc_i <= 0;
-     endcase // case(muxctrl[1:0])
-          
+     endcase // case (muxctrl[3:0])
+   
    always @(posedge clk)
-     case(muxctrl[3:2])		// The Q mapping
-       0: adc_q <= adc_b_ofs;	// "the real A"
-       1: adc_q <= adc_a_ofs;
+     case(muxctrl[7:4])		// The Q mapping
+       0: adc_q <= adc_a_ofs;
+       1: adc_q <= adc_b_ofs;
        2: adc_q <= 0;
        default: adc_q <= 0;
-     endcase // case(muxctrl[3:2])
-       
+     endcase // case (muxctrl[7:4])
+          
    always @(posedge clk)
      if(rst)
        phase <= 0;
diff --git a/fpga/usrp2/top/u2_rev3/u2_core_udp.v b/fpga/usrp2/top/u2_rev3/u2_core_udp.v
index 124930c23..c9502898b 100644
--- a/fpga/usrp2/top/u2_rev3/u2_core_udp.v
+++ b/fpga/usrp2/top/u2_rev3/u2_core_udp.v
@@ -425,7 +425,7 @@ module u2_core
        cycle_count <= cycle_count + 1;
 
    //compatibility number -> increment when the fpga has been sufficiently altered
-   localparam compat_num = 32'd1;
+   localparam compat_num = 32'd2;
 
    wb_readback_mux buff_pool_status
      (.wb_clk_i(wb_clk), .wb_rst_i(wb_rst), .wb_stb_i(s5_stb),
diff --git a/fpga/usrp2/top/u2_rev3/u2_rev3.v b/fpga/usrp2/top/u2_rev3/u2_rev3.v
index 3a43e4ffe..4daa66212 100644
--- a/fpga/usrp2/top/u2_rev3/u2_rev3.v
+++ b/fpga/usrp2/top/u2_rev3/u2_rev3.v
@@ -203,12 +203,13 @@ module u2_rev3
    reg [13:0] 	 adc_a_reg1, adc_b_reg1, adc_a_reg2, adc_b_reg2;
    reg 		 adc_ovf_a_reg1, adc_ovf_a_reg2, adc_ovf_b_reg1, adc_ovf_b_reg2;
 
+    // ADC A and B are swapped in schematic to facilitate clean layout
    always @(posedge dsp_clk)
      begin
-	adc_a_reg1 <= adc_a;
-	adc_b_reg1 <= adc_b;
-	adc_ovf_a_reg1 <= adc_ovf_a;
-	adc_ovf_b_reg1 <= adc_ovf_b;
+	adc_a_reg1 <= adc_b;
+	adc_b_reg1 <= adc_a;
+	adc_ovf_a_reg1 <= adc_ovf_b;
+	adc_ovf_b_reg1 <= adc_ovf_a;
      end
    
    always @(posedge dsp_clk)
@@ -327,8 +328,10 @@ module u2_rev3
      end
 
    wire [15:0] dac_a_int, dac_b_int;
-   always @(negedge dsp_clk) dac_a <= dac_a_int;
-   always @(negedge dsp_clk) dac_b <= dac_b_int;
+   // DAC A and B are swapped in schematic to facilitate clean layout
+   // DAC A is also inverted in schematic to facilitate clean layout
+   always @(negedge dsp_clk) dac_a <= ~dac_b_int;
+   always @(negedge dsp_clk) dac_b <= dac_a_int;
 
    /*
    OFDDRRSE OFDDRRSE_serdes_inst 
diff --git a/host/AUTHORS b/host/AUTHORS
index 137eba0e6..e0775f3a1 100644
--- a/host/AUTHORS
+++ b/host/AUTHORS
@@ -1,5 +1,6 @@
 Matt Ettus - matt@ettus.com
-    USRP1/USRP2 FPGA code
+    USRP1 FPGA code
+    USRP2 FPGA code
 
 Josh Blum - josh@ettus.com
     driver framework
@@ -14,4 +15,15 @@ Jason Abele - jason@ettus.com
     WBX host code
 
 Eric Blossom - eb@comsec.com
+    USRP1 firmware
     USRP2 firmware
+
+Tom Tsou - ttsou@vt.edu
+    UHD-USB framework
+    LIBUSB host code
+    USRP1 host code
+    USRP1 firmware
+
+Nick Foster - nick@nerdnetworks.org
+    LIBUSB host code
+    USRP1 host code
diff --git a/host/docs/CMakeLists.txt b/host/docs/CMakeLists.txt
index b4383f88d..bbb8812b0 100644
--- a/host/docs/CMakeLists.txt
+++ b/host/docs/CMakeLists.txt
@@ -25,6 +25,7 @@ SET(manual_sources
     dboards.rst
     general.rst
     images.rst
+    usrp1.rst
     usrp2.rst
 )
 
diff --git a/host/docs/build.rst b/host/docs/build.rst
index 8f0d0db59..d7dfd05e5 100644
--- a/host/docs/build.rst
+++ b/host/docs/build.rst
@@ -53,6 +53,14 @@ Boost
 * **Download URL (windows installer):** http://www.boostpro.com/download
 
 ^^^^^^^^^^^^^^^^
+LibUSB
+^^^^^^^^^^^^^^^^
+* **Purpose:** USB userspace library
+* **Version:** at least 1.0
+* **Required for:** build time + run time (optional)
+* **Download URL:** http://www.libusb.org/
+
+^^^^^^^^^^^^^^^^
 Python
 ^^^^^^^^^^^^^^^^
 * **Purpose:** used by Cheetah and utility scripts
diff --git a/host/docs/dboards.rst b/host/docs/dboards.rst
index b66fd2069..985fbc12b 100644
--- a/host/docs/dboards.rst
+++ b/host/docs/dboards.rst
@@ -28,7 +28,11 @@ greater than the Nyquist rate of the ADC.
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Basic TX and and LFTX
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-The Basic TX and LFTX boards have 1 quadrature subdevice using both antennas.
+The Basic TX and LFTX boards have 3 subdevices:
+
+* **Subdevice A:** real signal on antenna TXA
+* **Subdevice B:** real signal on antenna TXB
+* **Subdevice AB:** quadrature subdevice using both antennas
 
 The boards have no tunable elements or programmable gains.
 Though the magic of aliasing, you can up-convert signals
@@ -137,7 +141,7 @@ With the daughterboard plugged-in, run the following commands:
 ::
 
     cd <prefix>/share/uhd/utils
-    ./usrp_burn_db_eeprom --id=0x000d --unit=RX --args=<args> --db=<db>
+    ./usrp_burn_db_eeprom --id=0x000d --unit=RX --args=<args> --slot=<slot>
 
 * <args> are device address arguments (optional if only one USRP is on your machine)
-* <db> is the name of the daughterboard slot (optional if the USRP has only one slot)
+* <slot> is the name of the daughterboard slot (optional if the USRP has only one slot)
diff --git a/host/docs/index.rst b/host/docs/index.rst
index 6973ede19..bd55edc0b 100644
--- a/host/docs/index.rst
+++ b/host/docs/index.rst
@@ -22,6 +22,7 @@ Application Notes
 ^^^^^^^^^^^^^^^^^^^^^
 * `General App Notes <./general.html>`_
 * `Firmware and FPGA Image Notes <./images.html>`_
+* `USRP1 App Notes <./usrp1.html>`_
 * `USRP2 App Notes <./usrp2.html>`_
 * `Daughterboard App Notes <./dboards.html>`_
 
diff --git a/host/docs/usrp1.rst b/host/docs/usrp1.rst
new file mode 100644
index 000000000..3c1431d30
--- /dev/null
+++ b/host/docs/usrp1.rst
@@ -0,0 +1,115 @@
+========================================================================
+UHD - USRP1 Application Notes
+========================================================================
+
+.. contents:: Table of Contents
+
+------------------------------------------------------------------------
+Addressing the device
+------------------------------------------------------------------------
+A USRP1 can be identified though its 8 digit serial number,
+designated by the "serial" key in the device address.
+
+The device address string representation for a USRP1 with serial 12345678:
+
+::
+
+    serial=12345678
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Change the serial number
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The USRP1 serial number can be changed to any 8 byte string. Examples:
+
+::
+
+    cd <prefix>/share/uhd/utils
+    ./usrp1_serial_burner --new=87654321
+
+    -- OR --
+
+    ./usrp1_serial_burner --new=Beatrice
+
+    -- OR --
+
+    ./usrp1_serial_burner --old=12345678 --new=87654321
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Specify a non-standard image
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The standard USRP1 images installer comes with two FPGA images:
+ * **usrp1_fpga.rbf:** 2 DDCs + 2 DUCs
+ * **usrp1_fpga_4rx.rbf:** 4 DDCs + 0 DUCs
+
+By default, the USRP1 uses the FPGA image with 2 DDCs and 2 DUCs.
+However, a device address parameter can be used to override
+the FPGA image selection to use an alternate or a custom FPGA image.
+See the images application notes for installing custom images.
+
+Example device address string representations to specify non-standard firmware and/or FPGA images:
+
+::
+
+    fpga=usrp1_fpga_4rx.rbf
+
+    -- OR --
+
+    fw=usrp1_fw_custom.ihx
+
+    -- OR --
+
+    fpga=usrp1_fpga_4rx.rbf, fw=usrp1_fw_custom.ihx
+
+------------------------------------------------------------------------
+Specifying the subdevice to use
+------------------------------------------------------------------------
+The USRP1 has multiple daughterboard slots, known as slot A and slot B.
+The subdevice specification can be used to select
+the daughterboard and subdevice for each channel.
+For daughterboards with one one subdevice,
+the subdevice name may be left blank for automatic selection.
+
+Ex: The subdev spec markup string to select a WBX on slot B.
+Notice the use of the blank subdevice name for automatic selection.
+
+::
+
+    B:
+
+    -- OR --
+
+    B:0
+
+Ex: The subdev spec markup string to select a BasicRX on slot B.
+Notice that the subdevice name is always specified in the 3 possible cases.
+
+::
+
+    B:AB
+
+    -- OR --
+
+    B:A
+
+    -- OR --
+
+    B:B
+
+------------------------------------------------------------------------
+OS Specific Notes
+------------------------------------------------------------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Setup Udev on Linux
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+On Linux, Udev handles USB plug and unplug events.
+The following command creates a Udev rule for the USRP1
+so that non-root users may access the device:
+
+::
+
+    echo 'ACTION=="add", BUS=="usb", SYSFS{idVendor}=="fffe", SYSFS{idProduct}=="0002", MODE:="0666"' > tmpfile
+    sudo chown root.root tmpfile
+    sudo mv tmpfile /etc/udev/rules.d/10-usrp.rules
+    sudo udevadm control --reload-rules
+
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst
index 3ac326f58..745361b77 100644
--- a/host/docs/usrp2.rst
+++ b/host/docs/usrp2.rst
@@ -205,3 +205,27 @@ Example, set the args string to the following:
 ::
 
     addr=192.168.10.2, recv_buff_size=100e6
+
+------------------------------------------------------------------------
+Hardware setup notes
+------------------------------------------------------------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Ref Clock - 10MHz
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Using an external 10MHz reference clock requires a signal level between
++5dBm and +20dBm at 10MHz applied to the Ref Clock SMA port on the front panel.
+
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+PPS - Pulse Per Second
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Using a PPS signal for timestamp synchronization requires a 5Vpp square wave signal
+
+Test the PPS input of the USRP2 with the following app:
+::
+
+    cd <prefix>/share/uhd/examples
+    ./test_pps_input --args=<args>
+
+* <args> are device address arguments (optional if only one USRP is on your machine)
diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt
index c3bbbcd04..d19838335 100644
--- a/host/examples/CMakeLists.txt
+++ b/host/examples/CMakeLists.txt
@@ -15,13 +15,19 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-
+########################################################################
 ADD_EXECUTABLE(benchmark_rx_rate benchmark_rx_rate.cpp)
 TARGET_LINK_LIBRARIES(benchmark_rx_rate uhd)
 
 ADD_EXECUTABLE(rx_timed_samples rx_timed_samples.cpp)
 TARGET_LINK_LIBRARIES(rx_timed_samples uhd)
 
+ADD_EXECUTABLE(test_async_messages test_async_messages.cpp)
+TARGET_LINK_LIBRARIES(test_async_messages uhd)
+
+ADD_EXECUTABLE(test_pps_input test_pps_input.cpp)
+TARGET_LINK_LIBRARIES(test_pps_input uhd)
+
 ADD_EXECUTABLE(tx_timed_samples tx_timed_samples.cpp)
 TARGET_LINK_LIBRARIES(tx_timed_samples uhd)
 
@@ -31,6 +37,8 @@ TARGET_LINK_LIBRARIES(tx_waveforms uhd)
 INSTALL(TARGETS
     benchmark_rx_rate
     rx_timed_samples
+    test_async_messages
+    test_pps_input
     tx_timed_samples
     tx_waveforms
     RUNTIME DESTINATION ${PKG_DATA_DIR}/examples
diff --git a/host/examples/test_async_messages.cpp b/host/examples/test_async_messages.cpp
new file mode 100644
index 000000000..e02bc5f40
--- /dev/null
+++ b/host/examples/test_async_messages.cpp
@@ -0,0 +1,208 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/utils/static.hpp>
+#include <uhd/usrp/simple_usrp.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <complex>
+#include <iostream>
+
+namespace po = boost::program_options;
+
+static const size_t async_to_ms = 100;
+
+/*!
+ * Test that no messages are received:
+ *    Send a burst of many samples that will fragment internally.
+ *    We expect to not get any async messages.
+ */
+void test_no_async_message(uhd::usrp::simple_usrp::sptr sdev){
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << "Test no async message... " << std::flush;
+
+    uhd::tx_metadata_t md;
+    md.start_of_burst = true;
+    md.end_of_burst   = true;
+    md.has_time_spec  = false;
+
+    //3 times max-sps guarantees a SOB, no burst, and EOB packet
+    std::vector<std::complex<float> > buff(dev->get_max_send_samps_per_packet()*3);
+
+    dev->send(
+        &buff.front(), buff.size(), md,
+        uhd::io_type_t::COMPLEX_FLOAT32,
+        uhd::device::SEND_MODE_FULL_BUFF
+    );
+
+    uhd::async_metadata_t async_md;
+    if (dev->recv_async_msg(async_md, async_to_ms)){
+        std::cout << boost::format(
+            "failed:\n"
+            "    Got unexpected event code 0x%x.\n"
+        ) % async_md.event_code << std::endl;
+        //clear the async messages
+        while (dev->recv_async_msg(async_md, 0));
+    }
+    else{
+        std::cout << boost::format(
+            "success:\n"
+            "    Did not get an async message.\n"
+        ) << std::endl;
+    }
+}
+
+/*!
+ * Test the underflow message:
+ *    Send a start of burst packet with no following end of burst.
+ *    We expect to get an underflow(within a burst) async message.
+ */
+void test_underflow_message(uhd::usrp::simple_usrp::sptr sdev){
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << "Test underflow message... " << std::flush;
+
+    uhd::tx_metadata_t md;
+    md.start_of_burst = true;
+    md.end_of_burst   = false;
+    md.has_time_spec  = false;
+
+    dev->send(NULL, 0, md,
+        uhd::io_type_t::COMPLEX_FLOAT32,
+        uhd::device::SEND_MODE_FULL_BUFF
+    );
+
+    uhd::async_metadata_t async_md;
+    if (not dev->recv_async_msg(async_md, async_to_ms)){
+        std::cout << boost::format(
+            "failed:\n"
+            "    Async message recv timed out.\n"
+        ) << std::endl;
+        return;
+    }
+
+    switch(async_md.event_code){
+    case uhd::async_metadata_t::EVENT_CODE_UNDERFLOW:
+        std::cout << boost::format(
+            "success:\n"
+            "    Got event code underflow message.\n"
+        ) << std::endl;
+        break;
+
+    default:
+        std::cout << boost::format(
+            "failed:\n"
+            "    Got unexpected event code 0x%x.\n"
+        ) % async_md.event_code << std::endl;
+    }
+}
+
+/*!
+ * Test the time error message:
+ *    Send a burst packet that occurs at a time in the past.
+ *    We expect to get a time error async message.
+ */
+void test_time_error_message(uhd::usrp::simple_usrp::sptr sdev){
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << "Test time error message... " << std::flush;
+
+    uhd::tx_metadata_t md;
+    md.start_of_burst = true;
+    md.end_of_burst   = true;
+    md.has_time_spec  = true;
+    md.time_spec      = uhd::time_spec_t(100.0); //send at 100s
+
+    sdev->set_time_now(uhd::time_spec_t(200.0)); //time at 200s
+
+    dev->send(NULL, 0, md,
+        uhd::io_type_t::COMPLEX_FLOAT32,
+        uhd::device::SEND_MODE_FULL_BUFF
+    );
+
+    uhd::async_metadata_t async_md;
+    if (not dev->recv_async_msg(async_md, async_to_ms)){
+        std::cout << boost::format(
+            "failed:\n"
+            "    Async message recv timed out.\n"
+        ) << std::endl;
+        return;
+    }
+
+    switch(async_md.event_code){
+    case uhd::async_metadata_t::EVENT_CODE_TIME_ERROR:
+        std::cout << boost::format(
+            "success:\n"
+            "    Got event code time error message.\n"
+        ) << std::endl;
+        break;
+
+    default:
+        std::cout << boost::format(
+            "failed:\n"
+            "    Got unexpected event code 0x%x.\n"
+        ) % async_md.event_code << std::endl;
+    }
+}
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    uhd::set_thread_priority_safe();
+
+    //variables to be set by po
+    std::string args;
+    double rate;
+
+    //setup the program options
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
+        ("rate", po::value<double>(&rate)->default_value(1.5e6), "rate of outgoing samples")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("UHD Test Async Messages %s") % desc << std::endl;
+        return ~0;
+    }
+
+    //create a usrp device
+    std::cout << std::endl;
+    std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
+    uhd::usrp::simple_usrp::sptr sdev = uhd::usrp::simple_usrp::make(args);
+    std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl;
+
+    //set the tx sample rate
+    std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
+    sdev->set_tx_rate(rate);
+    std::cout << boost::format("Actual TX Rate: %f Msps...") % (sdev->get_tx_rate()/1e6) << std::endl << std::endl;
+
+    //------------------------------------------------------------------
+    // begin asyc messages test
+    //------------------------------------------------------------------
+    test_no_async_message(sdev);
+    test_underflow_message(sdev);
+    test_time_error_message(sdev);
+
+    //finished
+    std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+    return 0;
+}
diff --git a/host/examples/test_pps_input.cpp b/host/examples/test_pps_input.cpp
new file mode 100644
index 000000000..e01d32910
--- /dev/null
+++ b/host/examples/test_pps_input.cpp
@@ -0,0 +1,86 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/usrp/simple_usrp.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <boost/thread.hpp>
+#include <iostream>
+#include <complex>
+
+namespace po = boost::program_options;
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    uhd::set_thread_priority_safe();
+
+    //variables to be set by po
+    std::string args;
+    float seconds;
+
+    //setup the program options
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("UHD Test PPS Input %s") % desc << std::endl;
+        return ~0;
+    }
+
+    //create a usrp device
+    std::cout << std::endl;
+    std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
+    uhd::usrp::simple_usrp::sptr sdev = uhd::usrp::simple_usrp::make(args);
+    uhd::device::sptr dev = sdev->get_device();
+    std::cout << boost::format("Using Device: %s") % sdev->get_pp_string() << std::endl;
+
+    //set a known time value
+    std::cout << "Set time to known value (100.0) without regard to pps:" << std::endl;
+    sdev->set_time_now(uhd::time_spec_t(100.0));
+    boost::this_thread::sleep(boost::posix_time::seconds(1));
+    std::cout << boost::format("Reading time 1 second later: %f\n") % (sdev->get_time_now().get_full_secs()) << std::endl;
+
+    //store the time to see if PPS resets it
+    seconds = sdev->get_time_now().get_full_secs();
+
+    //set a known time at next PPS, check that time increments
+    uhd::time_spec_t time_spec = uhd::time_spec_t(0.0);
+    std::cout << "Set time to known value (0.0) at next pps:" << std::endl;
+    sdev->set_time_next_pps(time_spec);
+    boost::this_thread::sleep(boost::posix_time::seconds(1));
+    std::cout << boost::format("Reading time 1 second later: %f\n") % (sdev->get_time_now().get_full_secs()) << std::endl;
+
+    //finished
+    if (seconds > sdev->get_time_now().get_full_secs()){
+        std::cout << std::endl << "Success!" << std::endl << std::endl;
+        return 0;
+    } else {
+        std::cout << std::endl << "Failed!" << std::endl << std::endl 
+            << "If you expected PPS to work:" << std::endl
+            << "\tsee Device App Notes for PPS level information"
+            << std::endl << std::endl;
+        return -1;
+    }
+}
diff --git a/host/examples/tx_waveforms.cpp b/host/examples/tx_waveforms.cpp
index 9886000b1..3f319cf68 100644
--- a/host/examples/tx_waveforms.cpp
+++ b/host/examples/tx_waveforms.cpp
@@ -17,6 +17,7 @@
 
 #include <uhd/utils/thread_priority.hpp>
 #include <uhd/utils/safe_main.hpp>
+#include <uhd/utils/static.hpp>
 #include <uhd/usrp/simple_usrp.hpp>
 #include <boost/program_options.hpp>
 #include <boost/thread/thread_time.hpp> //system time
@@ -44,9 +45,16 @@ float gen_ramp(float x){
     return std::fmod(x, 1)*2 - 1;
 }
 
+#define sine_table_len 2048
+static float sine_table[sine_table_len];
+UHD_STATIC_BLOCK(gen_sine_table){
+    static const float m_pi = std::acos(float(-1));
+    for (size_t i = 0; i < sine_table_len; i++)
+        sine_table[i] = std::sin((2*m_pi*i)/sine_table_len);
+}
+
 float gen_sine(float x){
-    static const float two_pi = 2*std::acos(float(-1));
-    return std::sin(x*two_pi);
+    return sine_table[size_t(x*sine_table_len)%sine_table_len];
 }
 
 int UHD_SAFE_MAIN(int argc, char *argv[]){
@@ -65,11 +73,11 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("args", po::value<std::string>(&args)->default_value(""), "simple uhd device address args")
         ("duration", po::value<size_t>(&total_duration)->default_value(3), "number of seconds to transmit")
         ("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
-        ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")
+        ("rate", po::value<double>(&rate)->default_value(1.5e6), "rate of outgoing samples")
         ("freq", po::value<double>(&freq)->default_value(0), "rf center frequency in Hz")
         ("ampl", po::value<float>(&ampl)->default_value(float(0.3)), "amplitude of the waveform")
         ("gain", po::value<float>(&gain)->default_value(float(0)), "gain for the RF chain")
-        ("wave-type", po::value<std::string>(&wave_type)->default_value("SINE"), "waveform type (CONST, SQUARE, RAMP, SINE)")
+        ("wave-type", po::value<std::string>(&wave_type)->default_value("CONST"), "waveform type (CONST, SQUARE, RAMP, SINE)")
         ("wave-freq", po::value<double>(&wave_freq)->default_value(0), "waveform frequency in Hz")
     ;
     po::variables_map vm;
@@ -113,6 +121,9 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     if (std::abs(wave_freq) > sdev->get_tx_rate()/2){
         throw std::runtime_error("wave freq out of Nyquist zone");
     }
+    if (sdev->get_tx_rate()/std::abs(wave_freq) > sine_table_len/2 and wave_type == "SINE"){
+        throw std::runtime_error("sine freq too small for table");
+    }
 
     //store the generator function for the selected waveform
     boost::function<float(float)> wave_gen;
diff --git a/host/include/uhd/transport/CMakeLists.txt b/host/include/uhd/transport/CMakeLists.txt
index 93e9a6485..2c84c0724 100644
--- a/host/include/uhd/transport/CMakeLists.txt
+++ b/host/include/uhd/transport/CMakeLists.txt
@@ -22,9 +22,13 @@ INSTALL(FILES
     bounded_buffer.hpp
     bounded_buffer.ipp
     convert_types.hpp
+    convert_types.ipp
     if_addrs.hpp
     udp_simple.hpp
     udp_zero_copy.hpp
+    usb_control.hpp
+    usb_zero_copy.hpp
+    usb_device_handle.hpp
     vrt_if_packet.hpp
     zero_copy.hpp
     DESTINATION ${INCLUDE_DIR}/uhd/transport
diff --git a/host/include/uhd/transport/convert_types.hpp b/host/include/uhd/transport/convert_types.hpp
index a4d999240..dc7fa6c1a 100644
--- a/host/include/uhd/transport/convert_types.hpp
+++ b/host/include/uhd/transport/convert_types.hpp
@@ -21,6 +21,7 @@
 #include <uhd/config.hpp>
 #include <uhd/types/io_type.hpp>
 #include <uhd/types/otw_type.hpp>
+#include <vector>
 
 namespace uhd{ namespace transport{
 
@@ -40,6 +41,23 @@ UHD_API void convert_io_type_to_otw_type(
 );
 
 /*!
+ * Convert IO samples to OWT samples + interleave.
+ *
+ * \param io_buffs buffers containing samples
+ * \param io_type the type of these samples
+ * \param otw_buff memory to write converted samples
+ * \param otw_type the type of these samples
+ * \param nsamps_per_io_buff samples per io_buff
+ */
+UHD_API void convert_io_type_to_otw_type(
+    const std::vector<const void *> &io_buffs,
+    const io_type_t &io_type,
+    void *otw_buff,
+    const otw_type_t &otw_type,
+    size_t nsamps_per_io_buff
+);
+
+/*!
  * Convert OTW samples to IO samples.
  *
  * \param otw_buff memory containing samples
@@ -54,6 +72,25 @@ UHD_API void convert_otw_type_to_io_type(
     size_t num_samps
 );
 
+/*!
+ * Convert OTW samples to IO samples + de-interleave.
+ *
+ * \param otw_buff memory containing samples
+ * \param otw_type the type of these samples
+ * \param io_buffs buffers to write converted samples
+ * \param io_type the type of these samples
+ * \param nsamps_per_io_buff samples per io_buff
+ */
+UHD_API void convert_otw_type_to_io_type(
+    const void *otw_buff,
+    const otw_type_t &otw_type,
+    std::vector<void *> &io_buffs,
+    const io_type_t &io_type,
+    size_t nsamps_per_io_buff
+);
+
 }} //namespace
 
+#include <uhd/transport/convert_types.ipp>
+
 #endif /* INCLUDED_UHD_TRANSPORT_CONVERT_TYPES_HPP */
diff --git a/host/include/uhd/transport/convert_types.ipp b/host/include/uhd/transport/convert_types.ipp
new file mode 100644
index 000000000..914ca6f17
--- /dev/null
+++ b/host/include/uhd/transport/convert_types.ipp
@@ -0,0 +1,43 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_CONVERT_TYPES_IPP
+#define INCLUDED_UHD_TRANSPORT_CONVERT_TYPES_IPP
+
+UHD_INLINE void uhd::transport::convert_io_type_to_otw_type(
+    const void *io_buff, const io_type_t &io_type,
+    void *otw_buff, const otw_type_t &otw_type,
+    size_t num_samps
+){
+    std::vector<const void *> buffs(1, io_buff);
+    return uhd::transport::convert_io_type_to_otw_type(
+        buffs, io_type, otw_buff, otw_type, num_samps
+    );
+}
+
+UHD_INLINE void uhd::transport::convert_otw_type_to_io_type(
+    const void *otw_buff, const otw_type_t &otw_type,
+    void *io_buff, const io_type_t &io_type,
+    size_t num_samps
+){
+    std::vector<void *> buffs(1, io_buff);
+    return uhd::transport::convert_otw_type_to_io_type(
+        otw_buff, otw_type, buffs, io_type, num_samps
+    );
+}
+
+#endif /* INCLUDED_UHD_TRANSPORT_CONVERT_TYPES_IPP */
diff --git a/host/include/uhd/transport/usb_control.hpp b/host/include/uhd/transport/usb_control.hpp
new file mode 100644
index 000000000..6137ecf84
--- /dev/null
+++ b/host/include/uhd/transport/usb_control.hpp
@@ -0,0 +1,65 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_USB_CONTROL_HPP
+#define INCLUDED_UHD_TRANSPORT_USB_CONTROL_HPP
+
+#include "usb_device_handle.hpp"
+
+namespace uhd { namespace transport {
+
+class UHD_API usb_control : boost::noncopyable {
+public:
+    typedef boost::shared_ptr<usb_control> sptr;
+
+    /*!
+     * Create a new usb control transport:
+     * This transport is for sending and receiving control information from
+     * the host to device using the Default Control Pipe.
+     *
+     * \param handle a device handle that uniquely identifies a USB device
+     */
+    static sptr make(usb_device_handle::sptr handle);
+
+    /*!
+     * Submit a USB device request:
+     * Blocks until the request returns
+     *
+     * For format and corresponding USB request fields
+     * see USB Specification Revision 2.0 - 9.3 USB Device Requests
+     *
+     * Usage is device specific
+     *
+     * \param request_type 1-byte bitmask (bmRequestType)
+     * \param request      1-byte (bRequest)
+     * \param value        2-byte (wValue)
+     * \param index        2-byte (wIndex)
+     * \param buff         buffer to hold send or receive data
+     * \param length       2-byte (wLength)
+     * \return             number of bytes submitted
+     */
+    virtual size_t submit(boost::uint8_t request_type,
+                          boost::uint8_t request,
+                          boost::uint16_t value,
+                          boost::uint16_t index, 
+                          unsigned char *buff,
+                          boost::uint16_t length) = 0; 
+};
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_USB_CONTROL_HPP */
diff --git a/host/include/uhd/transport/usb_device_handle.hpp b/host/include/uhd/transport/usb_device_handle.hpp
new file mode 100644
index 000000000..c3eb72b00
--- /dev/null
+++ b/host/include/uhd/transport/usb_device_handle.hpp
@@ -0,0 +1,79 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_USB_DEVICE_HANDLE_HPP
+#define INCLUDED_UHD_TRANSPORT_USB_DEVICE_HANDLE_HPP
+
+#include <uhd/config.hpp>
+#include <boost/utility.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/cstdint.hpp>
+#include <vector>
+
+namespace uhd { namespace transport {
+
+/*!
+ * Device handle class that represents a USB device
+ * Used for identifying devices on the USB bus and selecting which device is
+ * used when creating a  USB transport. A minimal subset of USB descriptor
+ * fields are used. Fields can be found in the USB 2.0 specification Table
+ * 9-8 (Standard Device Descriptor). In addition to fields of the device
+ * descriptor, the interface returns the device's USB device address.
+ *
+ * Note: The USB 2.0 Standard Device Descriptor contains an index rather then
+ *       a true descriptor serial number string. This interface returns the
+ *       actual string descriptor.
+ */
+class UHD_API usb_device_handle : boost::noncopyable {
+public:
+    typedef boost::shared_ptr<usb_device_handle> sptr;
+
+    /*!
+     * Return the device's serial number 
+     * \return a string describing the device's serial number
+     */
+    virtual UHD_API std::string get_serial() const = 0;
+
+    /*!
+     * Return the device's Vendor ID (usually assigned by the USB-IF)
+     * \return a Vendor ID
+     */
+    virtual UHD_API boost::uint16_t get_vendor_id() const = 0;
+
+    /*!
+     * Return the device's Product ID (usually assigned by manufacturer)
+     * \return a Product ID
+     */
+    virtual UHD_API boost::uint16_t get_product_id() const = 0;
+
+    /*!
+     * Return the device's USB address
+     * \return a Product ID
+     */
+    virtual UHD_API boost::uint16_t get_device_addr() const = 0;
+
+    /*!
+     * Return a vector of USB devices on this host 
+     * \return a vector of USB device handles that match vid and pid
+     */
+    static UHD_API std::vector<usb_device_handle::sptr> get_device_list(boost::uint16_t vid, boost::uint16_t pid);
+
+}; //namespace usb
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_USB_DEVICE_HANDLE_HPP */
diff --git a/host/include/uhd/transport/usb_zero_copy.hpp b/host/include/uhd/transport/usb_zero_copy.hpp
new file mode 100644
index 000000000..2edd6d91d
--- /dev/null
+++ b/host/include/uhd/transport/usb_zero_copy.hpp
@@ -0,0 +1,62 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_USB_ZERO_COPY_HPP
+#define INCLUDED_UHD_TRANSPORT_USB_ZERO_COPY_HPP
+
+#include "usb_device_handle.hpp"
+#include <uhd/transport/zero_copy.hpp>
+
+namespace uhd { namespace transport {
+
+/*!
+ * A zero copy usb transport provides an efficient way to handle data.
+ * by avoiding the extra copy when recv() or send() is called on the handle.
+ * Rather, the zero copy transport gives the caller memory references.
+ * The caller informs the transport when it is finished with the reference.
+ *
+ * On linux systems, the zero copy transport can use a kernel packet ring.
+ * If no platform specific solution is available, make returns a boost asio
+ * implementation that wraps functionality around standard send/recv calls.
+ */
+class UHD_API usb_zero_copy : public virtual zero_copy_if {
+public:
+    typedef boost::shared_ptr<usb_zero_copy> sptr;
+
+    /*!
+     * Make a new zero copy usb transport:
+     * This transport is for sending and receiving between the host
+     * and a pair of USB bulk transfer endpoints.
+     * The primary usage for this transport is data transactions.
+     * The underlying implementation may be platform specific.
+     *
+     * \param handle a device handle that uniquely identifying the device
+     * \param rx_endpoint an integer specifiying an IN endpoint number 
+     * \param tx_endpoint an integer specifiying an OUT endpoint number
+     * \param buff_size total number of bytes of buffer space to allocate 
+     * \param block_size number of bytes allocated for each I/O transaction 
+     */
+    static sptr make(usb_device_handle::sptr handle,
+                     unsigned int rx_endpoint,
+                     unsigned int tx_endpoint,
+		     size_t buff_size = 0, 
+                     size_t block_size = 0);
+};
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_USB_ZERO_COPY_HPP */
diff --git a/host/include/uhd/usrp/subdev_spec.hpp b/host/include/uhd/usrp/subdev_spec.hpp
index 56aa0df20..2f32509b9 100644
--- a/host/include/uhd/usrp/subdev_spec.hpp
+++ b/host/include/uhd/usrp/subdev_spec.hpp
@@ -56,17 +56,8 @@ namespace uhd{ namespace usrp{
      *
      * The subdevice specification can be represented as a markup-string.
      * The markup-string is a whitespace separated list of dboard:subdev pairs.
-     * The "dboard:" part is optional on boards with only one daughterboard slot.
      * The first pair represents the subdevice for channel zero,
      * the second pair represents the subdevice for channel one, and so on.
-     *
-     * Examples:
-     * - Use subdevice AB on daughterboard A (USRP1): "A:AB"
-     * - Use subdevice A on daughterboard A for channel zero and subdevice A on daughterboard B for channel one (USRP1): "A:A B:A"
-     * - Use subdevice AB (USRP2): "AB" or ":AB"
-     *
-     * An empty subdevice specification can be used to automatically
-     * select the first subdevice on the first present daughterboard.
      */
     class UHD_API subdev_spec_t : public std::vector<subdev_spec_pair_t>{
     public:
diff --git a/host/lib/transport/CMakeLists.txt b/host/lib/transport/CMakeLists.txt
index bde2b72b9..71a3a1494 100644
--- a/host/lib/transport/CMakeLists.txt
+++ b/host/lib/transport/CMakeLists.txt
@@ -18,6 +18,30 @@
 #This file will be included by cmake, use absolute paths!
 
 ########################################################################
+# Setup libusb
+########################################################################
+LIST(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/lib/transport)
+FIND_PACKAGE(USB1 REQUIRED)
+
+IF(LIBUSB_FOUND)
+    INCLUDE_DIRECTORIES(${LIBUSB_INCLUDE_DIR})
+    LIBUHD_APPEND_LIBS(${LIBUSB_LIBRARIES})
+    LIBUHD_APPEND_SOURCES(
+        ${CMAKE_SOURCE_DIR}/lib/transport/libusb1_control.cpp
+        ${CMAKE_SOURCE_DIR}/lib/transport/libusb1_zero_copy.cpp
+        ${CMAKE_SOURCE_DIR}/lib/transport/libusb1_base.cpp
+        ${CMAKE_SOURCE_DIR}/lib/transport/libusb1_device_handle.cpp
+    )
+    SET(HAVE_USB_SUPPORT TRUE)
+ENDIF(LIBUSB_FOUND)
+
+IF(HAVE_USB_SUPPORT)
+    MESSAGE(STATUS "Has USB support - found")
+ELSE(HAVE_USB_SUPPORT)
+    MESSAGE(STATUS "Has USB support - not found")
+ENDIF(HAVE_USB_SUPPORT)
+
+########################################################################
 # Check for SIMD headers
 ########################################################################
 INCLUDE(CheckIncludeFileCXX)
diff --git a/host/lib/transport/FindUSB1.cmake b/host/lib/transport/FindUSB1.cmake
new file mode 100644
index 000000000..ebcac99eb
--- /dev/null
+++ b/host/lib/transport/FindUSB1.cmake
@@ -0,0 +1,38 @@
+# - Try to find the freetype library
+# Once done this defines
+#
+#  LIBUSB_FOUND - system has libusb
+#  LIBUSB_INCLUDE_DIR - the libusb include directory
+#  LIBUSB_LIBRARIES - Link these to use libusb
+
+# Copyright (c) 2006, 2008  Laurent Montel, <montel@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+if (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
+
+  # in cache already
+  set(LIBUSB_FOUND TRUE)
+
+else (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
+  IF (NOT WIN32)
+    # use pkg-config to get the directories and then use these values
+    # in the FIND_PATH() and FIND_LIBRARY() calls
+    find_package(PkgConfig)
+    pkg_check_modules(PC_LIBUSB libusb-1.0)
+  ENDIF(NOT WIN32)
+
+  FIND_PATH(LIBUSB_INCLUDE_DIR libusb.h
+    PATHS ${PC_LIBUSB_INCLUDEDIR} ${PC_LIBUSB_INCLUDE_DIRS})
+
+  FIND_LIBRARY(LIBUSB_LIBRARIES NAMES usb-1.0
+    PATHS ${PC_LIBUSB_LIBDIR} ${PC_LIBUSB_LIBRARY_DIRS})
+
+  include(FindPackageHandleStandardArgs)
+  FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBUSB DEFAULT_MSG LIBUSB_LIBRARIES LIBUSB_INCLUDE_DIR)
+
+  MARK_AS_ADVANCED(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
+
+endif (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
diff --git a/host/lib/transport/convert_types_impl.hpp b/host/lib/transport/convert_types_impl.hpp
index 5958b08cb..90618dec6 100644
--- a/host/lib/transport/convert_types_impl.hpp
+++ b/host/lib/transport/convert_types_impl.hpp
@@ -28,6 +28,10 @@
     #define USE_EMMINTRIN_H //use sse2 intrinsics
 #endif
 
+#if defined(USE_EMMINTRIN_H)
+    #include <emmintrin.h>
+#endif
+
 /***********************************************************************
  * Typedefs
  **********************************************************************/
@@ -38,41 +42,56 @@ typedef boost::uint32_t              item32_t;
 /***********************************************************************
  * Convert complex short buffer to items32
  **********************************************************************/
+static UHD_INLINE item32_t sc16_to_item32(sc16_t num){
+    boost::uint16_t real = num.real();
+    boost::uint16_t imag = num.imag();
+    return (item32_t(real) << 16) | (item32_t(imag) << 0);
+}
+
 static UHD_INLINE void sc16_to_item32_nswap(
     const sc16_t *input, item32_t *output, size_t nsamps
 ){
-    std::memcpy(output, input, nsamps*sizeof(item32_t));
+    for (size_t i = 0; i < nsamps; i++){
+        output[i] = sc16_to_item32(input[i]);
+    }
 }
 
 static UHD_INLINE void sc16_to_item32_bswap(
     const sc16_t *input, item32_t *output, size_t nsamps
 ){
-    const item32_t *item32_input = (const item32_t *)input;
     for (size_t i = 0; i < nsamps; i++){
-        output[i] = uhd::byteswap(item32_input[i]);
+        output[i] = uhd::byteswap(sc16_to_item32(input[i]));
     }
 }
 
 /***********************************************************************
  * Convert items32 buffer to complex short
  **********************************************************************/
+static UHD_INLINE sc16_t item32_to_sc16(item32_t item){
+    return sc16_t(
+        boost::int16_t(item >> 16),
+        boost::int16_t(item >> 0)
+    );
+}
+
 static UHD_INLINE void item32_to_sc16_nswap(
     const item32_t *input, sc16_t *output, size_t nsamps
 ){
-    std::memcpy(output, input, nsamps*sizeof(item32_t));
+    for (size_t i = 0; i < nsamps; i++){
+        output[i] = item32_to_sc16(input[i]);
+    }
 }
 
 static UHD_INLINE void item32_to_sc16_bswap(
     const item32_t *input, sc16_t *output, size_t nsamps
 ){
-    item32_t *item32_output = (item32_t *)output;
     for (size_t i = 0; i < nsamps; i++){
-        item32_output[i] = uhd::byteswap(input[i]);
+        output[i] = item32_to_sc16(uhd::byteswap(input[i]));
     }
 }
 
 /***********************************************************************
- * Convert complex float buffer to items32
+ * Convert complex float buffer to items32 (no swap)
  **********************************************************************/
 static const float shorts_per_float = float(32767);
 
@@ -82,6 +101,41 @@ static UHD_INLINE item32_t fc32_to_item32(fc32_t num){
     return (item32_t(real) << 16) | (item32_t(imag) << 0);
 }
 
+////////////////////////////////////
+// none-swap
+////////////////////////////////////
+#if defined(USE_EMMINTRIN_H)
+static UHD_INLINE void fc32_to_item32_nswap(
+    const fc32_t *input, item32_t *output, size_t nsamps
+){
+    __m128 scalar = _mm_set_ps1(shorts_per_float);
+
+    //convert blocks of samples with intrinsics
+    size_t i = 0; for (; i < (nsamps & ~0x3); i+=4){
+        //load from input
+        __m128 tmplo = _mm_loadu_ps(reinterpret_cast<const float *>(input+i+0));
+        __m128 tmphi = _mm_loadu_ps(reinterpret_cast<const float *>(input+i+2));
+
+        //convert and scale
+        __m128i tmpilo = _mm_cvtps_epi32(_mm_mul_ps(tmplo, scalar));
+        __m128i tmpihi = _mm_cvtps_epi32(_mm_mul_ps(tmphi, scalar));
+
+        //pack + swap 16-bit pairs
+        __m128i tmpi = _mm_packs_epi32(tmpilo, tmpihi);
+        tmpi = _mm_shufflelo_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1));
+        tmpi = _mm_shufflehi_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1));
+
+        //store to output
+        _mm_storeu_si128(reinterpret_cast<__m128i *>(output+i), tmpi);
+    }
+
+    //convert remainder
+    for (; i < nsamps; i++){
+        output[i] = fc32_to_item32(input[i]);
+    }
+}
+
+#else
 static UHD_INLINE void fc32_to_item32_nswap(
     const fc32_t *input, item32_t *output, size_t nsamps
 ){
@@ -90,9 +144,12 @@ static UHD_INLINE void fc32_to_item32_nswap(
     }
 }
 
-#if defined(USE_EMMINTRIN_H)
-#include <emmintrin.h>
+#endif
 
+////////////////////////////////////
+// byte-swap
+////////////////////////////////////
+#if defined(USE_EMMINTRIN_H)
 static UHD_INLINE void fc32_to_item32_bswap(
     const fc32_t *input, item32_t *output, size_t nsamps
 ){
@@ -108,7 +165,7 @@ static UHD_INLINE void fc32_to_item32_bswap(
         __m128i tmpilo = _mm_cvtps_epi32(_mm_mul_ps(tmplo, scalar));
         __m128i tmpihi = _mm_cvtps_epi32(_mm_mul_ps(tmphi, scalar));
 
-        //pack + byteswap -> byteswap 32 bit words
+        //pack + byteswap -> byteswap 16 bit words
         __m128i tmpi = _mm_packs_epi32(tmpilo, tmpihi);
         tmpi = _mm_or_si128(_mm_srli_epi16(tmpi, 8), _mm_slli_epi16(tmpi, 8));
 
@@ -145,6 +202,43 @@ static UHD_INLINE fc32_t item32_to_fc32(item32_t item){
     );
 }
 
+////////////////////////////////////
+// none-swap
+////////////////////////////////////
+#if defined(USE_EMMINTRIN_H)
+static UHD_INLINE void item32_to_fc32_nswap(
+    const item32_t *input, fc32_t *output, size_t nsamps
+){
+    __m128 scalar = _mm_set_ps1(floats_per_short/(1 << 16));
+    __m128i zeroi = _mm_setzero_si128();
+
+    //convert blocks of samples with intrinsics
+    size_t i = 0; for (; i < (nsamps & ~0x3); i+=4){
+        //load from input
+        __m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i));
+
+        //unpack + swap 16-bit pairs
+        tmpi = _mm_shufflelo_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1));
+        tmpi = _mm_shufflehi_epi16(tmpi, _MM_SHUFFLE(2, 3, 0, 1));
+        __m128i tmpilo = _mm_unpacklo_epi16(zeroi, tmpi); //value in upper 16 bits
+        __m128i tmpihi = _mm_unpackhi_epi16(zeroi, tmpi);
+
+        //convert and scale
+        __m128 tmplo = _mm_mul_ps(_mm_cvtepi32_ps(tmpilo), scalar);
+        __m128 tmphi = _mm_mul_ps(_mm_cvtepi32_ps(tmpihi), scalar);
+
+        //store to output
+        _mm_storeu_ps(reinterpret_cast<float *>(output+i+0), tmplo);
+        _mm_storeu_ps(reinterpret_cast<float *>(output+i+2), tmphi);
+    }
+
+    //convert remainder
+    for (; i < nsamps; i++){
+        output[i] = item32_to_fc32(input[i]);
+    }
+}
+
+#else
 static UHD_INLINE void item32_to_fc32_nswap(
     const item32_t *input, fc32_t *output, size_t nsamps
 ){
@@ -152,10 +246,12 @@ static UHD_INLINE void item32_to_fc32_nswap(
         output[i] = item32_to_fc32(input[i]);
     }
 }
+#endif
 
+////////////////////////////////////
+// byte-swap
+////////////////////////////////////
 #if defined(USE_EMMINTRIN_H)
-#include <emmintrin.h>
-
 static UHD_INLINE void item32_to_fc32_bswap(
     const item32_t *input, fc32_t *output, size_t nsamps
 ){
@@ -167,7 +263,7 @@ static UHD_INLINE void item32_to_fc32_bswap(
         //load from input
         __m128i tmpi = _mm_loadu_si128(reinterpret_cast<const __m128i *>(input+i));
 
-        //byteswap + unpack -> byteswap 32 bit words
+        //byteswap + unpack -> byteswap 16 bit words
         tmpi = _mm_or_si128(_mm_srli_epi16(tmpi, 8), _mm_slli_epi16(tmpi, 8));
         __m128i tmpilo = _mm_unpacklo_epi16(zeroi, tmpi); //value in upper 16 bits
         __m128i tmpihi = _mm_unpackhi_epi16(zeroi, tmpi);
diff --git a/host/lib/transport/gen_convert_types.py b/host/lib/transport/gen_convert_types.py
index 951b634d9..adbd22868 100755
--- a/host/lib/transport/gen_convert_types.py
+++ b/host/lib/transport/gen_convert_types.py
@@ -36,7 +36,8 @@ using namespace uhd;
  **********************************************************************/
 UHD_INLINE boost::uint8_t get_pred(
     const io_type_t &io_type,
-    const otw_type_t &otw_type
+    const otw_type_t &otw_type,
+    size_t num_chans
 ){
     boost::uint8_t pred = 0;
 
@@ -63,6 +64,14 @@ UHD_INLINE boost::uint8_t get_pred(
     default: throw std::runtime_error("unhandled io type id");
     }
 
+    switch(num_chans){
+    case 1: pred |= $ph.chan1_p; break;
+    case 2: pred |= $ph.chan2_p; break;
+    case 3: pred |= $ph.chan3_p; break;
+    case 4: pred |= $ph.chan4_p; break;
+    default: throw std::runtime_error("unhandled number of channels");
+    }
+
     return pred;
 }
 
@@ -70,17 +79,37 @@ UHD_INLINE boost::uint8_t get_pred(
  * Convert host type to device type
  **********************************************************************/
 void transport::convert_io_type_to_otw_type(
-    const void *io_buff, const io_type_t &io_type,
-    void *otw_buff, const otw_type_t &otw_type,
-    size_t num_samps
+    const std::vector<const void *> &io_buffs,
+    const io_type_t &io_type,
+    void *otw_buff,
+    const otw_type_t &otw_type,
+    size_t nsamps_per_io_buff
 ){
-    switch(get_pred(io_type, otw_type)){
+    switch(get_pred(io_type, otw_type, io_buffs.size())){
     #for $pred in range(2**$ph.nbits)
     case $pred:
         #set $out_type = $ph.get_dev_type($pred)
         #set $in_type = $ph.get_host_type($pred)
-        #set $converter = '_'.join([$in_type, 'to', $out_type, $ph.get_swap_type($pred)])
-        $(converter)((const $(in_type)_t *)io_buff, ($(out_type)_t *)otw_buff, num_samps);
+        #set $num_chans = $ph.get_num_chans($pred)
+        #set $converter = '_'.join([$in_type, 'to', $out_type])
+        #if $num_chans == 1
+        $(converter)_$ph.get_swap_type($pred)(
+            reinterpret_cast<const $(in_type)_t *>(io_buffs.front()),
+            reinterpret_cast<$(out_type)_t *>(otw_buff),
+            nsamps_per_io_buff
+        );
+        #else
+        for (size_t i = 0; i < nsamps_per_io_buff; i++){
+            #for $j in range($num_chans)
+            reinterpret_cast<$(out_type)_t *>(otw_buff)[i*$num_chans + $j] =
+                #if $ph.get_swap_type($pred) == 'bswap'
+                uhd::byteswap($(converter)(reinterpret_cast<const $(in_type)_t *>(io_buffs[$j])[i]));
+                #else
+                $(converter)(reinterpret_cast<const $(in_type)_t *>(io_buffs[$j])[i]);
+                #end if
+            #end for
+        }
+        #end if
         break;
     #end for
     }
@@ -90,17 +119,37 @@ void transport::convert_io_type_to_otw_type(
  * Convert device type to host type
  **********************************************************************/
 void transport::convert_otw_type_to_io_type(
-    const void *otw_buff, const otw_type_t &otw_type,
-    void *io_buff, const io_type_t &io_type,
-    size_t num_samps
+    const void *otw_buff,
+    const otw_type_t &otw_type,
+    std::vector<void *> &io_buffs,
+    const io_type_t &io_type,
+    size_t nsamps_per_io_buff
 ){
-    switch(get_pred(io_type, otw_type)){
-    #for $pred in range(4)
+    switch(get_pred(io_type, otw_type, io_buffs.size())){
+    #for $pred in range(2**$ph.nbits)
     case $pred:
         #set $out_type = $ph.get_host_type($pred)
         #set $in_type = $ph.get_dev_type($pred)
-        #set $converter = '_'.join([$in_type, 'to', $out_type, $ph.get_swap_type($pred)])
-        $(converter)((const $(in_type)_t *)otw_buff, ($(out_type)_t *)io_buff, num_samps);
+        #set $num_chans = $ph.get_num_chans($pred)
+        #set $converter = '_'.join([$in_type, 'to', $out_type])
+        #if $num_chans == 1
+        $(converter)_$ph.get_swap_type($pred)(
+            reinterpret_cast<const $(in_type)_t *>(otw_buff),
+            reinterpret_cast<$(out_type)_t *>(io_buffs.front()),
+            nsamps_per_io_buff
+        );
+        #else
+        for (size_t i = 0; i < nsamps_per_io_buff; i++){
+            #for $j in range($num_chans)
+            reinterpret_cast<$(out_type)_t *>(io_buffs[$j])[i] =
+                #if $ph.get_swap_type($pred) == 'bswap'
+                $(converter)(uhd::byteswap(reinterpret_cast<const $(in_type)_t *>(otw_buff)[i*$num_chans + $j]));
+                #else
+                $(converter)(reinterpret_cast<const $(in_type)_t *>(otw_buff)[i*$num_chans + $j]);
+                #end if
+            #end for
+        }
+        #end if
         break;
     #end for
     }
@@ -118,27 +167,43 @@ class ph:
     item32_p = 0b00000
     sc16_p   = 0b00010
     fc32_p   = 0b00000
+    chan1_p  = 0b00000
+    chan2_p  = 0b00100
+    chan3_p  = 0b01000
+    chan4_p  = 0b01100
 
-    nbits = 2 #see above
+    nbits = 4 #see above
 
     @staticmethod
-    def has(pred, flag): return (pred & flag) == flag
+    def has(pred, mask, flag): return (pred & mask) == flag
 
     @staticmethod
     def get_swap_type(pred):
-        if ph.has(pred, ph.bswap_p): return 'bswap'
-        if ph.has(pred, ph.nswap_p): return 'nswap'
+        mask = 0b1
+        if ph.has(pred, mask, ph.bswap_p): return 'bswap'
+        if ph.has(pred, mask, ph.nswap_p): return 'nswap'
         raise NotImplementedError
 
     @staticmethod
     def get_dev_type(pred):
-        if ph.has(pred, ph.item32_p): return 'item32'
+        mask = 0b0
+        if ph.has(pred, mask, ph.item32_p): return 'item32'
         raise NotImplementedError
 
     @staticmethod
     def get_host_type(pred):
-        if ph.has(pred, ph.sc16_p): return 'sc16'
-        if ph.has(pred, ph.fc32_p): return 'fc32'
+        mask = 0b10
+        if ph.has(pred, mask, ph.sc16_p): return 'sc16'
+        if ph.has(pred, mask, ph.fc32_p): return 'fc32'
+        raise NotImplementedError
+
+    @staticmethod
+    def get_num_chans(pred):
+        mask = 0b1100
+        if ph.has(pred, mask, ph.chan1_p): return 1
+        if ph.has(pred, mask, ph.chan2_p): return 2
+        if ph.has(pred, mask, ph.chan3_p): return 3
+        if ph.has(pred, mask, ph.chan4_p): return 4
         raise NotImplementedError
 
 if __name__ == '__main__':
diff --git a/host/lib/transport/libusb1_base.cpp b/host/lib/transport/libusb1_base.cpp
new file mode 100644
index 000000000..e21c39aa3
--- /dev/null
+++ b/host/lib/transport/libusb1_base.cpp
@@ -0,0 +1,126 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "libusb1_base.hpp"
+#include <uhd/utils/assert.hpp>
+#include <iostream>
+
+using namespace uhd::transport;
+
+/**********************************************************
+ * Helper Methods
+ **********************************************************/
+
+/**********************************************************
+ * libusb namespace 
+ **********************************************************/
+void libusb::init(libusb_context **ctx, int debug_level)
+{
+    if (libusb_init(ctx) < 0)
+        std::cerr << "error: libusb_init" << std::endl;
+
+    libusb_set_debug(*ctx, debug_level);
+}
+
+libusb_device_handle *libusb::open_device(libusb_context *ctx,
+                                          usb_device_handle::sptr handle)
+{
+    libusb_device_handle *dev_handle = NULL;
+    libusb_device **libusb_dev_list;
+    size_t dev_cnt = libusb_get_device_list(ctx, &libusb_dev_list);
+
+    //find and open the USB device 
+    for (size_t i = 0; i < dev_cnt; i++) {
+        libusb_device *dev = libusb_dev_list[i];
+
+        if (compare_device(dev, handle)) {
+            libusb_open(dev, &dev_handle);
+            libusb_unref_device(dev);
+            break;
+        }
+            
+        libusb_unref_device(dev);
+    }
+
+    return dev_handle;
+}
+
+//note: changed order of checks so it only tries to get_serial and get_device_address if vid and pid match
+//doing this so it doesn't try to open the device if it's not ours
+bool libusb::compare_device(libusb_device *dev,
+                            usb_device_handle::sptr handle)
+{
+    std::string serial         = handle->get_serial();
+    boost::uint16_t vendor_id  = handle->get_vendor_id();
+    boost::uint16_t product_id = handle->get_product_id();
+    boost::uint8_t device_addr = handle->get_device_addr();
+
+    libusb_device_descriptor libusb_desc;
+    if (libusb_get_device_descriptor(dev, &libusb_desc) < 0)
+        return false;
+    if (vendor_id != libusb_desc.idVendor)
+        return false;
+    if (product_id != libusb_desc.idProduct)
+        return false; 
+    if (serial != get_serial(dev))
+        return false;
+    if (device_addr != libusb_get_device_address(dev))
+        return false;
+
+    return true;
+}
+
+
+bool libusb::open_interface(libusb_device_handle *dev_handle,
+                            int interface)
+{
+    int ret = libusb_claim_interface(dev_handle, interface);
+    if (ret < 0) {
+        std::cerr << "error: libusb_claim_interface() " << ret << std::endl;
+        return false;
+    }
+    else {
+        return true;
+    }
+}
+
+
+std::string libusb::get_serial(libusb_device *dev)
+{
+    unsigned char buff[32];
+
+    libusb_device_descriptor desc;
+    if (libusb_get_device_descriptor(dev, &desc) < 0)
+        return "";
+
+    if (desc.iSerialNumber == 0)
+        return "";
+
+    //open the device because we have to
+    libusb_device_handle *dev_handle;
+    if (libusb_open(dev, &dev_handle) < 0)
+        return "";
+
+    if (libusb_get_string_descriptor_ascii(dev_handle, desc.iSerialNumber,
+                                           buff, sizeof(buff)) < 0) {
+        return "";
+    }
+
+    libusb_close(dev_handle);
+
+    return (char*) buff;
+}
diff --git a/host/lib/transport/libusb1_base.hpp b/host/lib/transport/libusb1_base.hpp
new file mode 100644
index 000000000..abe5e22a2
--- /dev/null
+++ b/host/lib/transport/libusb1_base.hpp
@@ -0,0 +1,94 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_TRANSPORT_LIBUSB_HPP
+#define INCLUDED_TRANSPORT_LIBUSB_HPP
+
+#include <uhd/config.hpp>
+#include <uhd/transport/usb_device_handle.hpp>
+#include <libusb-1.0/libusb.h>
+
+namespace uhd { namespace transport {
+
+namespace libusb {
+    /*
+     * Initialize libusb and set debug level
+     * Takes a pointer to context pointer because that's
+     * how libusb rolls. Debug levels.
+     *     
+     *   Level 0: no messages ever printed by the library (default)
+     *   Level 1: error messages are printed to stderr
+     *   Level 2: warning and error messages are printed to stderr
+     *   Level 3: informational messages are printed to stdout, warning
+     *            and error messages are printed to stderr
+     *
+     * \param ctx pointer to context pointer
+     * \param debug_level
+     */
+    void init(libusb_context **ctx, int debug_level);
+
+    /*
+     * Open the device specified by a generic handle
+     * Find the libusb_device cooresponding to the generic handle
+     * and open it for I/O, which returns a libusb_device_handle
+     * ready for an interface
+     * \param ctx the libusb context used for init
+     * \return a libusb_device_handle ready for action 
+     */
+    libusb_device_handle *open_device(libusb_context *ctx,
+                                      usb_device_handle::sptr handle);
+
+    /*
+     * Compare a libusb device with a generic handle 
+     * Check the descriptors and open the device to check the
+     * serial number string. Compare values against the given
+     * handle. The libusb context is already implied in the
+     * libusb_device.
+     * \param dev a libusb_device pointer
+     * \param handle a generic handle specifier
+     * \return true if handle and device match, false otherwise
+     */
+    bool compare_device(libusb_device *dev, usb_device_handle::sptr handle);
+
+    /*
+     * Open an interface to the device
+     * This is a logical operation for operating system housekeeping as
+     * nothing is sent over the bus. The interface much correspond
+     * to the USB device descriptors.
+     * \param dev_handle libusb handle to an opened device
+     * \param interface integer of the interface to use
+     * \return true on success, false on error
+     */
+    bool open_interface(libusb_device_handle *dev_handle, int interface);
+
+    /*
+     * Get serial number 
+     * The standard USB device descriptor contains an index to an
+     * actual serial number string descriptor. The index is readily
+     * readble, but the string descriptor requires probing the device.
+     * Because this call attempts to open the device, it may not
+     * succeed because not all USB devices are readily opened.
+     * The default language is used for the request (English).
+     * \param dev a libusb_device pointer
+     * \return string serial number or 0 on error or unavailablity
+     */
+    std::string get_serial(libusb_device *dev);
+}
+
+}} //namespace
+
+#endif /* INCLUDED_TRANSPORT_LIBUSB_HPP */
diff --git a/host/lib/transport/libusb1_control.cpp b/host/lib/transport/libusb1_control.cpp
new file mode 100644
index 000000000..3531128b2
--- /dev/null
+++ b/host/lib/transport/libusb1_control.cpp
@@ -0,0 +1,95 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "libusb1_base.hpp"
+#include <uhd/transport/usb_control.hpp>
+
+using namespace uhd::transport;
+
+const int libusb_debug_level = 0;
+const int libusb_timeout = 0;
+
+/***********************************************************************
+ * libusb-1.0 implementation of USB control transport
+ **********************************************************************/
+class libusb_control_impl : public usb_control {
+public:
+    libusb_control_impl(usb_device_handle::sptr handle);
+    ~libusb_control_impl();
+
+    size_t submit(boost::uint8_t request_type,
+                  boost::uint8_t request,
+                  boost::uint16_t value,
+                  boost::uint16_t index,
+                  unsigned char *buff,
+                  boost::uint16_t length); 
+
+private:
+    libusb_context       *_ctx;
+    libusb_device_handle *_dev_handle;
+};
+
+
+libusb_control_impl::libusb_control_impl(usb_device_handle::sptr handle)
+{
+    libusb::init(&_ctx, libusb_debug_level);
+
+    // Find and open the libusb_device corresponding to the
+    // given handle and return the libusb_device_handle
+    // that can be used for I/O purposes.
+    _dev_handle = libusb::open_device(_ctx, handle);
+
+    // Open USB interfaces for control using magic value
+    // IN interface:      2
+    // OUT interface:     1
+    // Control interface: 0
+    libusb::open_interface(_dev_handle, 0);
+}
+
+
+libusb_control_impl::~libusb_control_impl()
+{
+    libusb_close(_dev_handle);
+    libusb_exit(_ctx);
+}
+
+
+size_t libusb_control_impl::submit(boost::uint8_t request_type,
+                                   boost::uint8_t request,
+                                   boost::uint16_t value,
+                                   boost::uint16_t index, 
+                                   unsigned char *buff,
+                                   boost::uint16_t length) 
+{
+    return libusb_control_transfer(_dev_handle,
+                                   request_type,
+                                   request,
+                                   value,
+                                   index,
+                                   buff, 
+                                   length, 
+                                   libusb_timeout);
+}
+
+
+/***********************************************************************
+ * USB control public make functions
+ **********************************************************************/
+usb_control::sptr usb_control::make(usb_device_handle::sptr handle)
+{
+    return sptr(new libusb_control_impl(handle));
+}
diff --git a/host/lib/transport/libusb1_device_handle.cpp b/host/lib/transport/libusb1_device_handle.cpp
new file mode 100644
index 000000000..43d0f0e26
--- /dev/null
+++ b/host/lib/transport/libusb1_device_handle.cpp
@@ -0,0 +1,117 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "libusb1_base.hpp"
+#include <uhd/utils/assert.hpp>
+#include <iostream>
+
+using namespace uhd::transport;
+
+const int libusb_debug_level = 0;
+
+/****************************************************************
+ * libusb USB device handle implementation class
+ ***************************************************************/
+class libusb1_device_handle_impl : public usb_device_handle {
+public:
+    libusb1_device_handle_impl(std::string serial,
+                               boost::uint32_t product_id,
+                               boost::uint32_t vendor_id,
+                               boost::uint32_t device_addr)
+      : _serial(serial), _product_id(product_id), 
+        _vendor_id(vendor_id), _device_addr(device_addr)
+    {
+        /* NOP */
+    }
+
+    ~libusb1_device_handle_impl()
+    {
+        /* NOP */
+    }
+
+    std::string get_serial() const
+    {
+        return _serial;
+    }
+
+    boost::uint16_t get_vendor_id() const
+    {
+        return _vendor_id;
+    }
+
+
+    boost::uint16_t get_product_id() const
+    {
+        return _product_id;
+    }
+
+    boost::uint16_t get_device_addr() const
+    {
+        return _device_addr;
+    }
+
+private:
+    std::string     _serial;
+    boost::uint32_t _product_id;
+    boost::uint32_t _vendor_id;
+    boost::uint32_t _device_addr;
+};
+
+
+usb_device_handle::sptr make_usb_device_handle(libusb_device *dev)
+{
+    libusb_device_descriptor desc;
+
+    if (libusb_get_device_descriptor(dev, &desc) < 0) {
+        UHD_ASSERT_THROW("USB: failed to get device descriptor");
+    }
+
+    std::string     serial      = libusb::get_serial(dev);
+    boost::uint32_t product_id  = desc.idProduct;
+    boost::uint32_t vendor_id   = desc.idVendor;
+    boost::uint32_t device_addr = libusb_get_device_address(dev);
+
+    return usb_device_handle::sptr(new libusb1_device_handle_impl(
+        serial,
+        product_id,
+        vendor_id,
+        device_addr));
+}
+
+std::vector<usb_device_handle::sptr> usb_device_handle::get_device_list(boost::uint16_t vid, boost::uint16_t pid)
+{
+    libusb_context *ctx = NULL;
+    libusb_device** libusb_device_list;
+    std::vector<usb_device_handle::sptr> device_handle_list;
+    libusb_device_descriptor desc;
+
+    libusb::init(&ctx, libusb_debug_level);
+
+    size_t dev_size = libusb_get_device_list(ctx, &libusb_device_list);
+    for (size_t i = 0; i < dev_size; i++) {
+        libusb_device *dev = libusb_device_list[i];
+        if(libusb_get_device_descriptor(dev, &desc) < 0) {
+          UHD_ASSERT_THROW("USB: failed to get device descriptor");
+        }
+        if(desc.idVendor == vid && desc.idProduct == pid) {
+          device_handle_list.push_back(make_usb_device_handle(dev));
+        }
+    }
+
+    libusb_exit(ctx);
+    return device_handle_list; 
+}
diff --git a/host/lib/transport/libusb1_zero_copy.cpp b/host/lib/transport/libusb1_zero_copy.cpp
new file mode 100644
index 000000000..b890a87f9
--- /dev/null
+++ b/host/lib/transport/libusb1_zero_copy.cpp
@@ -0,0 +1,767 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "libusb1_base.hpp"
+#include <uhd/transport/usb_zero_copy.hpp>
+#include <uhd/utils/assert.hpp>
+#include <boost/asio.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+#include <iomanip>
+
+using namespace uhd::transport;
+
+const int libusb_debug_level = 0;
+const int libusb_timeout = 0;
+
+/***********************************************************************
+ * Helper functions
+ ***********************************************************************/
+/*
+ * Print the values of a libusb_transfer struct
+ * http://libusb.sourceforge.net/api-1.0/structlibusb__transfer.html
+ */
+void pp_transfer(libusb_transfer *lut)
+{
+    std::cout << "Libusb transfer"       << std::endl;
+    std::cout << "    flags:         0x" << std::hex << (unsigned int) lut->flags << std::endl;
+    std::cout << "    endpoint:      0x" << std::hex << (unsigned int) lut->endpoint << std::endl;
+    std::cout << "    type:          0x" << std::hex << (unsigned int) lut->type << std::endl;
+    std::cout << "    timeout:       "   << std::dec << lut->timeout << std::endl;
+    std::cout << "    status:        0x" << std::hex << lut->status << std::endl;
+    std::cout << "    length:        "   << std::dec << lut->length << std::endl;
+    std::cout << "    actual_length: "   << std::dec << lut->actual_length << std::endl;
+}
+
+/***********************************************************************
+ * USB asynchronous zero_copy endpoint
+ *   This endpoint implementation provides asynchronous I/O to libusb-1.0
+ *   devices. Each endpoint is directional and two can be combined to
+ *   create a bidirectional interface. It is a zero copy implementation
+ *   with respect to libusb, however, each send and recv requires a copy
+ *   operation from kernel to userspace; this is due to the usbfs
+ *   interface provided by the kernel. 
+ **********************************************************************/
+class usb_endpoint {
+private:
+    libusb_device_handle *_dev_handle;
+    libusb_context *_ctx;
+    int  _endpoint;
+    bool _input;
+
+    size_t _transfer_size;
+    size_t _num_transfers;
+
+    // Transfer state lists (transfers are free, pending, or completed)
+    std::list<libusb_transfer *>  _free_list;
+    std::list<libusb_transfer *>  _pending_list;
+    std::list<libusb_transfer *>  _completed_list;
+
+    // Calls for processing asynchronous I/O 
+    libusb_transfer *allocate_transfer(int buff_len);
+    bool cancel(libusb_transfer *lut);
+    bool cancel_all();
+    bool reap_pending_list();
+    bool reap_pending_list_timeout();
+    bool reap_completed_list();
+
+    // Transfer state manipulators 
+    void free_list_add(libusb_transfer *lut);
+    void pending_list_add(libusb_transfer *lut);
+    void completed_list_add(libusb_transfer *lut);
+    libusb_transfer *free_list_get();
+    libusb_transfer *completed_list_get();
+    bool pending_list_remove(libusb_transfer *lut);
+
+    // Debug use
+    void print_transfer_status(libusb_transfer *lut);
+
+public:
+    usb_endpoint(libusb_device_handle *dev_handle,
+                 libusb_context *ctx, int endpoint, bool input,
+                 size_t transfer_size, size_t num_transfers);
+
+    ~usb_endpoint();
+
+    // Exposed interface for submitting / retrieving transfer buffers
+    bool submit(libusb_transfer *lut);
+    libusb_transfer *get_completed_transfer();
+    libusb_transfer *get_free_transfer();
+
+    //Callback use only
+    void callback_handle_transfer(libusb_transfer *lut);
+};
+
+
+/*
+ * Callback function called when submitted transfers complete.
+ * The endpoint upon which the transfer is part of is recovered
+ * and the transfer moved from pending to completed state.
+ * Callbacks occur during the reaping calls where libusb_handle_events()
+ * is used. The callback only modifies the transfer state by moving
+ * it from the pending to completed status list.
+ * \param lut pointer to libusb_transfer
+ */
+static void callback(libusb_transfer *lut)
+{
+    usb_endpoint *endpoint = (usb_endpoint *) lut->user_data; 
+    endpoint->callback_handle_transfer(lut);
+}
+
+
+/*
+ * Accessor call to allow list access from callback space
+ * \param pointer to libusb_transfer
+ */
+void usb_endpoint::callback_handle_transfer(libusb_transfer *lut)
+{
+    if (!pending_list_remove(lut)) {
+        std::cerr << "USB: pending remove failed" << std::endl;
+        return;
+    }
+
+    completed_list_add(lut);    
+}
+
+
+/*
+ * Constructor
+ * Allocate libusb transfers and mark as free.  For IN endpoints,
+ * submit the transfers so that they're ready to return when
+ * data is available. 
+ */
+usb_endpoint::usb_endpoint(libusb_device_handle *dev_handle,
+                          libusb_context *ctx, int endpoint, bool input,
+                          size_t transfer_size, size_t num_transfers)
+    : _dev_handle(dev_handle),
+      _ctx(ctx), _endpoint(endpoint), _input(input),
+      _transfer_size(transfer_size), _num_transfers(num_transfers)
+{
+    unsigned int i;
+    for (i = 0; i < _num_transfers; i++) {
+        free_list_add(allocate_transfer(_transfer_size));
+
+        if (_input)
+            submit(free_list_get());
+    }
+}
+
+
+/*
+ * Destructor
+ * Make sure all the memory is freed. Cancel any pending transfers.
+ * When all completed transfers are moved to the free list, release
+ * the transfers. Libusb will deallocate the data buffer held by
+ * each transfer.
+ */
+usb_endpoint::~usb_endpoint()
+{
+    cancel_all();
+
+    while (!_pending_list.empty()) {
+        if (!reap_pending_list())
+            std::cerr << "error: destructor failed to reap" << std::endl;
+    }
+
+    while (!_completed_list.empty()) {
+        if (!reap_completed_list())
+            std::cerr << "error: destructor failed to reap" << std::endl;
+    }
+
+    while (!_free_list.empty()) {
+        libusb_free_transfer(free_list_get());
+    }
+}
+
+
+/*
+ * Allocate a libusb transfer 
+ * The allocated transfer - and buffer it contains - is repeatedly
+ * submitted, reaped, and reused and should not be freed until shutdown.
+ * \param buff_len size of the individual buffer held by each transfer
+ * \return pointer to an allocated libusb_transfer
+ */
+libusb_transfer *usb_endpoint::allocate_transfer(int buff_len)
+{
+    libusb_transfer *lut = libusb_alloc_transfer(0);
+
+    unsigned char *buff = new unsigned char[buff_len];
+
+    unsigned int endpoint = ((_endpoint & 0x7f) | (_input ? 0x80 : 0));
+
+    libusb_fill_bulk_transfer(lut,                // transfer
+                              _dev_handle,        // dev_handle
+                              endpoint,           // endpoint
+                              buff,               // buffer
+                              buff_len,           // length
+                              callback,           // callback
+                              this,               // user_data
+                              0);                 // timeout
+    return lut;
+}
+
+
+/*
+ * Asynchonous transfer submission
+ * Submit a libusb transfer to libusb add pending status
+ * \param lut pointer to libusb_transfer
+ * \return true on success or false on error 
+ */
+bool usb_endpoint::submit(libusb_transfer *lut)
+{
+    int retval;
+    if ((retval = libusb_submit_transfer(lut)) < 0) {
+        std::cerr << "error: libusb_submit_transfer: " << retval << std::endl;
+        return false;
+    }
+
+    pending_list_add(lut);
+    return true;
+}
+
+
+/*
+ * Cancel a pending transfer 
+ * Search the pending list for the transfer and cancel if found.
+ * \param lut pointer to libusb_transfer to cancel
+ * \return true on success or false if transfer is not found
+ *
+ * Note: success only indicates submission of cancelation request.
+ * Sucessful cancelation is not known until the callback occurs.
+ */
+bool usb_endpoint::cancel(libusb_transfer *lut)
+{
+    std::list<libusb_transfer*>::iterator iter;
+    for (iter = _pending_list.begin(); iter != _pending_list.end(); iter++) {
+        if (*iter == lut) { 
+            libusb_cancel_transfer(lut); 
+            return true;
+        }
+    }
+    return false;
+}
+
+
+/*
+ * Cancel all pending transfers 
+ * \return bool true if cancelation request is submitted
+ *
+ * Note: success only indicates submission of cancelation request.
+ * Sucessful cancelation is not known until the callback occurs.
+ */
+bool usb_endpoint::cancel_all()
+{
+    std::list<libusb_transfer*>::iterator iter;
+
+    for (iter = _pending_list.begin(); iter != _pending_list.end(); iter++) {
+        if (libusb_cancel_transfer(*iter) < 0) {
+            std::cerr << "error: libusb_cancal_transfer() failed" << std::endl;
+            return false;
+        }
+    }
+
+    return true;
+}
+
+
+/*
+ * Reap completed transfers
+ * return true if at least one transfer was reaped, false otherwise. 
+ * Check completed transfers for errors and mark as free. This is a
+ * blocking call. 
+ * \return bool true if a libusb transfer is reaped, false otherwise
+ */
+bool usb_endpoint::reap_completed_list()
+{
+    libusb_transfer *lut;
+
+    if (_completed_list.empty()) {
+        if (!reap_pending_list_timeout())
+            return false;
+    }
+
+    while (!_completed_list.empty()) {
+        lut = completed_list_get();
+        print_transfer_status(lut);
+        free_list_add(lut);
+    }
+
+    return true;
+}
+
+
+/*
+ * Print status errors of a completed transfer
+ * \param lut pointer to an libusb_transfer
+ */
+void usb_endpoint::print_transfer_status(libusb_transfer *lut)
+{
+    switch (lut->status) {
+    case LIBUSB_TRANSFER_COMPLETED:
+        if (lut->actual_length < lut->length) {
+            std::cerr << "USB: transfer completed with short write,"
+                      << " length = " << lut->length
+                      << " actual = " << lut->actual_length << std::endl;
+        }
+
+        if ((lut->actual_length < 0) || (lut->length < 0)) {
+            std::cerr << "USB: transfer completed with invalid response"
+                      << std::endl;
+        }
+        break;
+    case LIBUSB_TRANSFER_CANCELLED:
+        break;
+    case LIBUSB_TRANSFER_NO_DEVICE:
+        std::cerr << "USB: device was disconnected" << std::endl;
+        break;
+    case LIBUSB_TRANSFER_OVERFLOW:
+        std::cerr << "USB: device sent more data than requested" << std::endl;
+        break;
+    case LIBUSB_TRANSFER_TIMED_OUT:
+        std::cerr << "USB: transfer timed out" << std::endl;
+        break;
+    case LIBUSB_TRANSFER_STALL:
+        std::cerr << "USB: halt condition detected (stalled)" << std::endl;
+        break;
+    case LIBUSB_TRANSFER_ERROR:
+        std::cerr << "USB: transfer failed" << std::endl;
+        break;
+    default:
+        std::cerr << "USB: received unknown transfer status" << std::endl;
+    }
+}
+
+
+/*
+ * Reap pending transfers without timeout 
+ * This is a blocking call. Reaping submitted transfers is
+ * handled by libusb and the assigned callback function.
+ * Block until at least one transfer is reaped.
+ * \return true true if a transfer was reaped or false otherwise
+ */
+bool usb_endpoint::reap_pending_list()
+{
+    int retval;
+
+    if ((retval = libusb_handle_events(_ctx)) < 0) {
+        std::cerr << "error: libusb_handle_events: " << retval << std::endl;
+        return false;
+    }
+
+    return true;
+}
+
+
+/*
+ * Reap pending transfers with timeout 
+ * This call blocks until a transfer is reaped or timeout.
+ * Reaping submitted transfers is handled by libusb and the
+ * assigned callback function. Block until at least one
+ * transfer is reaped or timeout occurs.
+ * \return true if a transfer was reaped or false otherwise
+ */
+bool usb_endpoint::reap_pending_list_timeout()
+{
+    int retval;
+    timeval tv;
+
+    tv.tv_sec = 0;
+    tv.tv_usec = 100000; //100ms
+
+    size_t pending_list_size = _pending_list.size();
+
+    if ((retval = libusb_handle_events_timeout(_ctx, &tv)) < 0) {
+        std::cerr << "error: libusb_handle_events: " << retval << std::endl;
+        return false;
+    }
+
+    if (_pending_list.size() < pending_list_size) {
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+
+/*
+ * Get a free transfer
+ * The transfer has an empty data bufer for OUT requests 
+ * \return pointer to a libusb_transfer
+ */
+libusb_transfer *usb_endpoint::get_free_transfer()
+{
+    if (_free_list.empty()) {
+        if (!reap_completed_list())
+            return NULL; 
+    }
+
+    return free_list_get();
+}
+
+
+/*
+ * Get a completed transfer 
+ * The transfer has a full data buffer for IN requests
+ * \return pointer to libusb_transfer
+ */
+libusb_transfer *usb_endpoint::get_completed_transfer()
+{
+    if (_completed_list.empty()) {
+        if (!reap_pending_list_timeout())
+            return NULL; 
+    }
+
+    return completed_list_get();
+}
+
+/*
+ * List operations 
+ */
+void usb_endpoint::free_list_add(libusb_transfer *lut)
+{
+    _free_list.push_back(lut);
+}
+
+void usb_endpoint::pending_list_add(libusb_transfer *lut)
+{
+    _pending_list.push_back(lut);
+}
+
+void usb_endpoint::completed_list_add(libusb_transfer *lut)
+{
+    _completed_list.push_back(lut);
+}
+
+
+/*
+ * Free and completed lists don't have ordered content 
+ * Pop transfers from the front as needed
+ */
+libusb_transfer *usb_endpoint::free_list_get()
+{
+    libusb_transfer *lut;
+
+    if (_free_list.size() == 0) {
+        return NULL; 
+    }
+    else { 
+        lut = _free_list.front();
+        _free_list.pop_front();
+        return lut;
+    }
+}
+
+
+/*
+ * Free and completed lists don't have ordered content 
+ * Pop transfers from the front as needed
+ */
+libusb_transfer *usb_endpoint::completed_list_get()
+{
+    libusb_transfer *lut;
+
+    if (_completed_list.empty()) {
+        return NULL;
+    }
+    else { 
+        lut = _completed_list.front();
+        _completed_list.pop_front();
+        return lut;
+    }
+}
+
+
+/*
+ * Search and remove transfer from pending list
+ * Assuming that the callbacks occur in order, the front element
+ * should yield the correct transfer. If not, then something else
+ * is going on. If no transfers match, then something went wrong.
+ */
+bool usb_endpoint::pending_list_remove(libusb_transfer *lut)
+{
+    std::list<libusb_transfer*>::iterator iter;
+    for (iter = _pending_list.begin(); iter != _pending_list.end(); iter++) {
+        if (*iter == lut) { 
+            _pending_list.erase(iter);
+            return true;
+        }
+    }
+    return false;
+}
+
+
+/***********************************************************************
+ * Managed buffers 
+ **********************************************************************/
+/*
+ * Libusb managed receive buffer
+ * Construct a recv buffer from a libusb transfer. The memory held by
+ * the libusb transfer is exposed through the managed buffer interface.
+ * Upon destruction, the transfer and buffer are resubmitted to the
+ * endpoint for further use. 
+ */
+class libusb_managed_recv_buffer_impl : public managed_recv_buffer {
+public:
+    libusb_managed_recv_buffer_impl(libusb_transfer *lut,
+                                    usb_endpoint *endpoint)
+        : _buff(lut->buffer, lut->length)
+    {
+        _lut = lut;
+        _endpoint = endpoint;
+    }
+
+    ~libusb_managed_recv_buffer_impl()
+    {
+       if (!_endpoint->submit(_lut))
+           std::cerr << "USB: failed to submit IN transfer" << std::endl;
+    }
+
+private:
+    const boost::asio::const_buffer &get() const
+    {
+        return _buff; 
+    }
+
+    libusb_transfer *_lut;
+    usb_endpoint *_endpoint;
+    const boost::asio::const_buffer _buff;
+};
+
+/*
+ * Libusb managed send buffer
+ * Construct a send buffer from a libusb transfer. The memory held by
+ * the libusb transfer is exposed through the managed buffer interface.
+ * Committing the buffer will set the data length and submit the buffer
+ * to the endpoint. Submitting a buffer multiple times or destroying
+ * the buffer before committing is an error. For the latter, the transfer
+ * is returned to the endpoint with no data for reuse.
+ */
+class libusb_managed_send_buffer_impl : public managed_send_buffer {
+public:
+    libusb_managed_send_buffer_impl(libusb_transfer *lut,
+                                    usb_endpoint *endpoint,
+                                    size_t buff_size)
+        : _buff(lut->buffer, buff_size), _committed(false)
+    {
+        _lut = lut;
+        _endpoint = endpoint;
+    }
+
+    ~libusb_managed_send_buffer_impl()
+    {
+        if (!_committed) {
+            _lut->length = 0;
+            _lut->actual_length = 0;
+            _endpoint->submit(_lut);
+        }
+    }
+
+    ssize_t commit(size_t num_bytes)
+    {
+        if (_committed) {
+            std::cerr << "UHD: send buffer already committed" << std::endl;
+            return 0;
+        }
+        
+        UHD_ASSERT_THROW(num_bytes <= boost::asio::buffer_size(_buff));
+
+        _lut->length = num_bytes;
+        _lut->actual_length = 0;
+
+        if (_endpoint->submit(_lut)) {
+            _committed = true;
+            return num_bytes;
+        }
+        else {
+            return 0;
+        }
+    }
+
+private:
+    const boost::asio::mutable_buffer &get() const
+    {
+        return _buff; 
+    }
+
+    libusb_transfer *_lut;
+    usb_endpoint *_endpoint;
+    const boost::asio::mutable_buffer _buff;
+    bool _committed;
+};
+
+
+/***********************************************************************
+ * USB zero_copy device class
+ **********************************************************************/
+class libusb_zero_copy_impl : public usb_zero_copy
+{
+private:
+    usb_endpoint          *_rx_ep;
+    usb_endpoint          *_tx_ep;
+
+    // Maintain libusb values
+    libusb_context       *_rx_ctx;
+    libusb_context       *_tx_ctx;
+    libusb_device_handle *_rx_dev_handle;
+    libusb_device_handle *_tx_dev_handle;
+
+    size_t _recv_buff_size;
+    size_t _send_buff_size;
+    size_t _num_frames;
+
+public:
+    typedef boost::shared_ptr<libusb_zero_copy_impl> sptr;
+
+    libusb_zero_copy_impl(usb_device_handle::sptr handle,
+                          unsigned int rx_endpoint,
+                          unsigned int tx_endpoint,
+                          size_t recv_buff_size,
+                          size_t send_buff_size);
+    
+    ~libusb_zero_copy_impl();
+
+    managed_recv_buffer::sptr get_recv_buff(void);
+    managed_send_buffer::sptr get_send_buff(void);
+
+    size_t get_num_recv_frames(void) const { return _num_frames; }
+    size_t get_num_send_frames(void) const { return _num_frames; }
+};
+
+/*
+ * Constructor
+ * Initializes libusb, opens devices, and sets up interfaces for I/O.
+ * Finally, creates endpoints for asynchronous I/O. 
+ */
+libusb_zero_copy_impl::libusb_zero_copy_impl(usb_device_handle::sptr handle,
+                                             unsigned int rx_endpoint,
+                                             unsigned int tx_endpoint,
+                                             size_t buff_size,
+                                             size_t block_size)
+ : _rx_ctx(NULL), _tx_ctx(NULL), _rx_dev_handle(NULL), _tx_dev_handle(NULL),
+   _recv_buff_size(block_size), _send_buff_size(block_size),
+   _num_frames(buff_size / block_size)
+{
+    // Initialize libusb with separate contexts to allow
+    // thread safe operation of transmit and receive 
+    libusb::init(&_rx_ctx, libusb_debug_level);
+    libusb::init(&_tx_ctx, libusb_debug_level);
+
+    UHD_ASSERT_THROW((_rx_ctx != NULL) && (_tx_ctx != NULL));
+
+    // Find and open the libusb_device corresponding to the
+    // given handle and return the libusb_device_handle
+    // that can be used for I/O purposes.
+    _rx_dev_handle = libusb::open_device(_rx_ctx, handle);
+    _tx_dev_handle = libusb::open_device(_tx_ctx, handle);
+
+    // Open USB interfaces for tx/rx using magic values.
+    // IN interface:      2
+    // OUT interface:     1
+    // Control interface: 0
+    libusb::open_interface(_rx_dev_handle, 2);
+    libusb::open_interface(_tx_dev_handle, 1);
+
+    _rx_ep = new usb_endpoint(_rx_dev_handle,  // libusb device_handle
+                              _rx_ctx,         // libusb context
+                              rx_endpoint,     // USB endpoint number
+                              true,            // IN endpoint
+                              _recv_buff_size, // buffer size per transfer 
+                              _num_frames);    // number of libusb transfers
+
+    _tx_ep = new usb_endpoint(_tx_dev_handle,  // libusb device_handle
+                              _tx_ctx,         // libusb context
+                              tx_endpoint,     // USB endpoint number
+                              false,           // OUT endpoint
+                              _send_buff_size, // buffer size per transfer
+                              _num_frames);    // number of libusb transfers
+}
+
+
+libusb_zero_copy_impl::~libusb_zero_copy_impl()
+{
+    delete _rx_ep;
+    delete _tx_ep; 
+
+    libusb_close(_rx_dev_handle);
+    libusb_close(_tx_dev_handle);
+
+    libusb_exit(_rx_ctx);
+    libusb_exit(_tx_ctx);
+}
+
+
+/*
+ * Construct a managed receive buffer from a completed libusb transfer
+ * (happy with buffer full of data) obtained from the receive endpoint.
+ * Return empty pointer if no transfer is available (timeout or error).
+ * \return pointer to a managed receive buffer 
+ */
+managed_recv_buffer::sptr libusb_zero_copy_impl::get_recv_buff()
+{
+    libusb_transfer *lut = _rx_ep->get_completed_transfer();
+    if (lut == NULL) {
+        return managed_recv_buffer::sptr();
+    }
+    else {
+        return managed_recv_buffer::sptr(
+            new libusb_managed_recv_buffer_impl(lut,
+                                                _rx_ep));
+    }
+}
+
+
+/*
+ * Construct a managed send buffer from a free libusb transfer (with
+ * empty buffer). Return empty pointer of no transfer is available
+ * (timeout or error).
+ * \return pointer to a managed send buffer 
+ */
+managed_send_buffer::sptr libusb_zero_copy_impl::get_send_buff()
+{
+    libusb_transfer *lut = _tx_ep->get_free_transfer();
+    if (lut == NULL) {
+        return managed_send_buffer::sptr();
+    }
+    else {
+        return managed_send_buffer::sptr(
+            new libusb_managed_send_buffer_impl(lut,
+                                                _tx_ep,
+                                                _send_buff_size));
+    }
+}
+
+
+/***********************************************************************
+ * USB zero_copy make functions
+ **********************************************************************/
+usb_zero_copy::sptr usb_zero_copy::make(usb_device_handle::sptr handle,
+                                        unsigned int rx_endpoint,
+                                        unsigned int tx_endpoint,
+                                        size_t buff_size,
+                                        size_t block_size)
+
+{
+    return sptr(new libusb_zero_copy_impl(handle,
+                                          rx_endpoint,
+                                          tx_endpoint,
+                                          buff_size, 
+                                          block_size));
+}
+
+
+
diff --git a/host/lib/usrp/CMakeLists.txt b/host/lib/usrp/CMakeLists.txt
index 2b408e479..b5c545988 100644
--- a/host/lib/usrp/CMakeLists.txt
+++ b/host/lib/usrp/CMakeLists.txt
@@ -31,4 +31,5 @@ LIBUHD_APPEND_SOURCES(
 )
 
 INCLUDE(${CMAKE_SOURCE_DIR}/lib/usrp/dboard/CMakeLists.txt)
+INCLUDE(${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/CMakeLists.txt)
 INCLUDE(${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/CMakeLists.txt)
diff --git a/host/lib/usrp/dboard/db_basic_and_lf.cpp b/host/lib/usrp/dboard/db_basic_and_lf.cpp
index 0b6e4a75a..2a9bf2ca5 100644
--- a/host/lib/usrp/dboard/db_basic_and_lf.cpp
+++ b/host/lib/usrp/dboard/db_basic_and_lf.cpp
@@ -57,6 +57,12 @@ private:
     double _max_freq;
 };
 
+static const uhd::dict<std::string, subdev_conn_t> sd_name_to_conn = map_list_of
+    ("AB", SUBDEV_CONN_COMPLEX_IQ)
+    ("A",  SUBDEV_CONN_REAL_I)
+    ("B",  SUBDEV_CONN_REAL_Q)
+;
+
 /***********************************************************************
  * Register the basic and LF dboards
  **********************************************************************/
@@ -77,10 +83,10 @@ static dboard_base::sptr make_lf_tx(dboard_base::ctor_args_t args){
 }
 
 UHD_STATIC_BLOCK(reg_basic_and_lf_dboards){
-    dboard_manager::register_dboard(0x0000, &make_basic_tx, "Basic TX");
-    dboard_manager::register_dboard(0x0001, &make_basic_rx, "Basic RX", list_of("AB")("A")("B"));
-    dboard_manager::register_dboard(0x000e, &make_lf_tx,    "LF TX");
-    dboard_manager::register_dboard(0x000f, &make_lf_rx,    "LF RX",    list_of("AB")("A")("B"));
+    dboard_manager::register_dboard(0x0000, &make_basic_tx, "Basic TX", sd_name_to_conn.keys());
+    dboard_manager::register_dboard(0x0001, &make_basic_rx, "Basic RX", sd_name_to_conn.keys());
+    dboard_manager::register_dboard(0x000e, &make_lf_tx,    "LF TX",    sd_name_to_conn.keys());
+    dboard_manager::register_dboard(0x000f, &make_lf_rx,    "LF RX",    sd_name_to_conn.keys());
 }
 
 /***********************************************************************
@@ -138,14 +144,9 @@ void basic_rx::rx_get(const wax::obj &key_, wax::obj &val){
         val = prop_names_t(1, ""); //vector of 1 empty string
         return;
 
-    case SUBDEV_PROP_CONNECTION:{
-            static const uhd::dict<std::string, subdev_conn_t> name_to_conn = map_list_of
-                ("A",  SUBDEV_CONN_REAL_I)
-                ("B",  SUBDEV_CONN_REAL_Q)
-                ("AB", SUBDEV_CONN_COMPLEX_IQ)
-            ;
-            val = name_to_conn[get_subdev_name()];
-        } return;
+    case SUBDEV_PROP_CONNECTION:
+        val = sd_name_to_conn[get_subdev_name()];
+        return;
 
     case SUBDEV_PROP_USE_LO_OFFSET:
         val = false;
@@ -197,7 +198,10 @@ void basic_tx::tx_get(const wax::obj &key_, wax::obj &val){
     //handle the get request conditioned on the key
     switch(key.as<subdev_prop_t>()){
     case SUBDEV_PROP_NAME:
-        val = get_tx_id().to_pp_string();
+        val = std::string(str(boost::format("%s - %s")
+            % get_tx_id().to_pp_string()
+            % get_subdev_name()
+        ));
         return;
 
     case SUBDEV_PROP_OTHERS:
@@ -233,7 +237,7 @@ void basic_tx::tx_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case SUBDEV_PROP_CONNECTION:
-        val = SUBDEV_CONN_COMPLEX_IQ;
+        val = sd_name_to_conn[get_subdev_name()];
         return;
 
     case SUBDEV_PROP_USE_LO_OFFSET:
diff --git a/host/lib/usrp/dboard/db_dbsrx.cpp b/host/lib/usrp/dboard/db_dbsrx.cpp
index 06cf91d3b..81434f054 100644
--- a/host/lib/usrp/dboard/db_dbsrx.cpp
+++ b/host/lib/usrp/dboard/db_dbsrx.cpp
@@ -205,7 +205,12 @@ dbsrx::dbsrx(ctor_args_t args) : rx_dboard_base(args){
 
     //set the gpio directions and atr controls (identically)
     this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, 0x0); // All unused in atr
-    this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, 0x0); // All Inputs
+    if (this->get_iface()->get_special_props().soft_clock_divider){
+        this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, 0x1); // GPIO0 is clock
+    }
+    else{
+        this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, 0x0); // All Inputs
+    }
 
     //send initial register settings
     this->send_reg(0x0, 0x5);
diff --git a/host/lib/usrp/dsp_utils.cpp b/host/lib/usrp/dsp_utils.cpp
index fe1313af1..10ae9a086 100644
--- a/host/lib/usrp/dsp_utils.cpp
+++ b/host/lib/usrp/dsp_utils.cpp
@@ -30,22 +30,36 @@ template <class T> T ceil_log2(T num){
     return std::ceil(std::log(num)/std::log(T(2)));
 }
 
+/*!
+ *     3                   2                   1                   0
+ *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ *  +-------------------------------+-------+-------+-------+-------+
+ *  |                                               | DDC0Q | DDC0I |
+ *  +-------------------------------+-------+-------+-------+-------+
+ */
 boost::uint32_t dsp_type1::calc_rx_mux_word(subdev_conn_t subdev_conn){
     switch(subdev_conn){
-    case SUBDEV_CONN_COMPLEX_IQ: return (0x1 << 2) | (0x0 << 0); //DDC0Q=ADC1, DDC0I=ADC0
-    case SUBDEV_CONN_COMPLEX_QI: return (0x0 << 2) | (0x1 << 0); //DDC0Q=ADC0, DDC0I=ADC1
-    case SUBDEV_CONN_REAL_I:     return (0x3 << 2) | (0x0 << 0); //DDC0Q=ZERO, DDC0I=ADC0
-    case SUBDEV_CONN_REAL_Q:     return (0x1 << 2) | (0x3 << 0); //DDC0Q=ADC1, DDC0I=ZERO
+    case SUBDEV_CONN_COMPLEX_IQ: return (0x1 << 4) | (0x0 << 0); //DDC0Q=ADC0Q, DDC0I=ADC0I
+    case SUBDEV_CONN_COMPLEX_QI: return (0x0 << 4) | (0x1 << 0); //DDC0Q=ADC0I, DDC0I=ADC0Q
+    case SUBDEV_CONN_REAL_I:     return (0xf << 4) | (0x0 << 0); //DDC0Q=ZERO,  DDC0I=ADC0I
+    case SUBDEV_CONN_REAL_Q:     return (0x1 << 4) | (0xf << 0); //DDC0Q=ADC0Q, DDC0I=ZERO
     default:                     UHD_THROW_INVALID_CODE_PATH();
     }
 }
 
+/*!
+ *     3                   2                   1                   0
+ *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ *  +-------------------------------+-------+-------+-------+-------+
+ *  |                                               | DAC0Q | DAC0I |
+ *  +-------------------------------+-------+-------+-------+-------+
+ */
 boost::uint32_t dsp_type1::calc_tx_mux_word(subdev_conn_t subdev_conn){
     switch(subdev_conn){
-    case SUBDEV_CONN_COMPLEX_IQ: return (0x1 << 4) | (0x0 << 0); //DAC1=DUC0Q, DAC0=DUC0I
-    case SUBDEV_CONN_COMPLEX_QI: return (0x0 << 4) | (0x1 << 0); //DAC1=DUC0I, DAC0=DUC0Q
-    case SUBDEV_CONN_REAL_I:     return (0xf << 4) | (0x0 << 0); //DAC1=ZERO,  DAC0=DUC0I
-    case SUBDEV_CONN_REAL_Q:     return (0x0 << 4) | (0xf << 0); //DAC1=DUC0I, DAC0=ZERO
+    case SUBDEV_CONN_COMPLEX_IQ: return (0x1 << 4) | (0x0 << 0); //DAC0Q=DUC0Q, DAC0I=DUC0I
+    case SUBDEV_CONN_COMPLEX_QI: return (0x0 << 4) | (0x1 << 0); //DAC0Q=DUC0I, DAC0I=DUC0Q
+    case SUBDEV_CONN_REAL_I:     return (0xf << 4) | (0x0 << 0); //DAC0Q=ZERO,  DAC0I=DUC0I
+    case SUBDEV_CONN_REAL_Q:     return (0x0 << 4) | (0xf << 0); //DAC0Q=DUC0I, DAC0I=ZERO
     default:                     UHD_THROW_INVALID_CODE_PATH();
     }
 }
diff --git a/host/lib/usrp/misc_utils.cpp b/host/lib/usrp/misc_utils.cpp
index a1664d810..5cfcdc8d3 100644
--- a/host/lib/usrp/misc_utils.cpp
+++ b/host/lib/usrp/misc_utils.cpp
@@ -164,13 +164,22 @@ static void verify_xx_subdev_spec(
             //empty db name means select dboard automatically
             if (pair.db_name.empty()){
                 if (dboard_names.size() != 1) throw std::runtime_error(
-                    "A daughterboard name must be provided for multi-slot boards: " + subdev_spec.to_string()
+                    "A daughterboard name must be provided for multi-slot motherboards: " + subdev_spec.to_string()
                 );
                 pair.db_name == dboard_names.front();
             }
             uhd::assert_has(dboard_names, pair.db_name, xx_type + " dboard name");
             wax::obj dboard = mboard[named_prop_t(dboard_prop, pair.db_name)];
-            uhd::assert_has(dboard[DBOARD_PROP_SUBDEV_NAMES].as<prop_names_t>(), pair.sd_name, xx_type + " subdev name");
+            prop_names_t subdev_names = dboard[DBOARD_PROP_SUBDEV_NAMES].as<prop_names_t>();
+
+            //empty sd name means select the subdev automatically
+            if (pair.sd_name.empty()){
+                if (subdev_names.size() != 1) throw std::runtime_error(
+                    "A subdevice name must be provided for multi-subdev daughterboards: " + subdev_spec.to_string()
+                );
+                pair.sd_name == subdev_names.front();
+            }
+            uhd::assert_has(subdev_names, pair.sd_name, xx_type + " subdev name");
         }
     }catch(const std::exception &e){
         throw std::runtime_error(str(boost::format(
diff --git a/host/lib/usrp/usrp1/CMakeLists.txt b/host/lib/usrp/usrp1/CMakeLists.txt
new file mode 100644
index 000000000..67487f99e
--- /dev/null
+++ b/host/lib/usrp/usrp1/CMakeLists.txt
@@ -0,0 +1,65 @@
+#
+# Copyright 2010 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+#This file will be included by cmake, use absolute paths!
+
+########################################################################
+# Conditionally configure the USRP1 support
+########################################################################
+MESSAGE(STATUS "Configuring USRP1 support...")
+
+IF(DEFINED ENABLE_USRP1)
+    IF(ENABLE_USRP1)
+        MESSAGE(STATUS "USRP1 support enabled by configure flag")
+    ELSE(ENABLE_USRP1)
+        MESSAGE(STATUS "USRP1 support disabled by configure flag")
+    ENDIF(ENABLE_USRP1)
+ELSE(DEFINED ENABLE_USRP1) #not defined: automatic enabling of component
+    SET(ENABLE_USRP1 ${HAVE_USB_SUPPORT})
+ENDIF(DEFINED ENABLE_USRP1)
+SET(ENABLE_USRP1 ${ENABLE_USRP1} CACHE BOOL "enable USRP1 support")
+
+#sanity check when USRP1 support enabled
+IF(ENABLE_USRP1 AND NOT HAVE_USB_SUPPORT)
+    MESSAGE(FATAL_ERROR "USRP1 support enabled without USB support")
+ENDIF(ENABLE_USRP1 AND NOT HAVE_USB_SUPPORT)
+
+IF(ENABLE_USRP1)
+    MESSAGE(STATUS "  Building USRP1 support.")
+    INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/../firmware/fx2/include)
+
+    LIBUHD_APPEND_SOURCES(
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/clock_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/clock_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/codec_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/codec_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/codec_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/dboard_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/dboard_iface.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/dsp_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/io_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/mboard_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_iface.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_iface.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_impl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp1/usrp1_ctrl.hpp
+    )
+ELSE(ENABLE_USRP1)
+    MESSAGE(STATUS "  Skipping USRP1 support.")
+ENDIF(ENABLE_USRP1)
diff --git a/host/lib/usrp/usrp1/clock_ctrl.cpp b/host/lib/usrp/usrp1/clock_ctrl.cpp
new file mode 100644
index 000000000..68c5f5320
--- /dev/null
+++ b/host/lib/usrp/usrp1/clock_ctrl.cpp
@@ -0,0 +1,60 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "clock_ctrl.hpp"
+#include "fpga_regs_standard.h"
+#include <uhd/utils/assert.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/foreach.hpp>
+#include <utility>
+#include <iostream>
+
+using namespace uhd;
+
+/***********************************************************************
+ * Constants
+ **********************************************************************/
+static const double master_clock_rate = 64e6;
+
+/***********************************************************************
+ * Clock Control Implementation
+ **********************************************************************/
+class usrp1_clock_ctrl_impl : public usrp1_clock_ctrl {
+public:
+    usrp1_clock_ctrl_impl(usrp1_iface::sptr iface)
+    {
+        _iface = iface;
+    }
+
+    double get_master_clock_freq(void)
+    {
+        return master_clock_rate; 
+    }
+
+private:
+    usrp1_iface::sptr _iface;
+
+};
+
+/***********************************************************************
+ * Clock Control Make
+ **********************************************************************/
+usrp1_clock_ctrl::sptr usrp1_clock_ctrl::make(usrp1_iface::sptr iface)
+{
+    return sptr(new usrp1_clock_ctrl_impl(iface));
+}
diff --git a/host/lib/usrp/usrp1/clock_ctrl.hpp b/host/lib/usrp/usrp1/clock_ctrl.hpp
new file mode 100644
index 000000000..366869dab
--- /dev/null
+++ b/host/lib/usrp/usrp1/clock_ctrl.hpp
@@ -0,0 +1,50 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRP1_CLOCK_CTRL_HPP
+#define INCLUDED_USRP1_CLOCK_CTRL_HPP
+
+#include "usrp1_iface.hpp"
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+#include <vector>
+
+/*!
+ * The usrp1 clock control:
+ * - Setup system clocks.
+ * - Disable/enable clock lines.
+ */
+class usrp1_clock_ctrl : boost::noncopyable{
+public:
+    typedef boost::shared_ptr<usrp1_clock_ctrl> sptr;
+
+    /*!
+     * Make a new clock control object.
+     * \param iface the usrp1 iface object
+     * \return the clock control object
+     */
+    static sptr make(usrp1_iface::sptr iface);
+
+    /*!
+     * Get the rate of the fpga clock line.
+     * \return the fpga clock rate in Hz
+     */
+    virtual double get_master_clock_freq(void) = 0;
+
+};
+
+#endif /* INCLUDED_USRP1_CLOCK_CTRL_HPP */
diff --git a/host/lib/usrp/usrp1/codec_ctrl.cpp b/host/lib/usrp/usrp1/codec_ctrl.cpp
new file mode 100644
index 000000000..08f2d2a8e
--- /dev/null
+++ b/host/lib/usrp/usrp1/codec_ctrl.cpp
@@ -0,0 +1,429 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "codec_ctrl.hpp"
+#include "usrp_commands.h"
+#include "clock_ctrl.hpp"
+#include "ad9862_regs.hpp"
+#include <uhd/types/dict.hpp>
+#include <uhd/utils/assert.hpp>
+#include <uhd/utils/algorithm.hpp>
+#include <uhd/utils/byteswap.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/format.hpp>
+#include <boost/tuple/tuple.hpp>
+#include <boost/math/special_functions/round.hpp>
+#include <boost/assign/list_of.hpp>
+#include <iostream>
+#include <iomanip>
+
+using namespace uhd;
+
+static const bool codec_debug = false;
+
+const gain_range_t usrp1_codec_ctrl::tx_pga_gain_range(-20, 0, float(0.1));
+const gain_range_t usrp1_codec_ctrl::rx_pga_gain_range(0, 20, 1);
+
+/***********************************************************************
+ * Codec Control Implementation
+ **********************************************************************/
+class usrp1_codec_ctrl_impl : public usrp1_codec_ctrl {
+public:
+    //structors
+    usrp1_codec_ctrl_impl(usrp1_iface::sptr iface,
+                          usrp1_clock_ctrl::sptr clock,
+                          int spi_slave);
+    ~usrp1_codec_ctrl_impl(void);
+
+    //aux adc and dac control
+    float read_aux_adc(aux_adc_t which);
+    void write_aux_dac(aux_dac_t which, float volts);
+
+    //duc control
+    void set_duc_freq(double freq);
+
+    //pga gain control
+    void set_tx_pga_gain(float);
+    float get_tx_pga_gain(void);
+    void set_rx_pga_gain(float, char);
+    float get_rx_pga_gain(char);
+
+private:
+    usrp1_iface::sptr _iface;
+    usrp1_clock_ctrl::sptr _clock_ctrl;
+    int _spi_slave;
+    ad9862_regs_t _ad9862_regs;
+    aux_adc_t _last_aux_adc_a, _last_aux_adc_b;
+    void send_reg(boost::uint8_t addr);
+    void recv_reg(boost::uint8_t addr);
+
+    double coarse_tune(double codec_rate, double freq);
+    double fine_tune(double codec_rate, double freq);
+};
+
+/***********************************************************************
+ * Codec Control Structors
+ **********************************************************************/
+usrp1_codec_ctrl_impl::usrp1_codec_ctrl_impl(usrp1_iface::sptr iface,
+                                             usrp1_clock_ctrl::sptr clock,
+                                             int spi_slave)
+{
+    _iface = iface;
+    _clock_ctrl = clock;
+    _spi_slave = spi_slave;
+
+    //soft reset
+    _ad9862_regs.soft_reset = 1;
+    this->send_reg(0);
+
+    //initialize the codec register settings
+    _ad9862_regs.sdio_bidir = ad9862_regs_t::SDIO_BIDIR_SDIO_SDO;
+    _ad9862_regs.lsb_first = ad9862_regs_t::LSB_FIRST_MSB;
+    _ad9862_regs.soft_reset = 0;
+
+    //setup rx side of codec
+    _ad9862_regs.byp_buffer_a = 1;
+    _ad9862_regs.byp_buffer_b = 1;
+    _ad9862_regs.buffer_a_pd = 1;
+    _ad9862_regs.buffer_b_pd = 1;
+    _ad9862_regs.rx_pga_a = 0;
+    _ad9862_regs.rx_pga_b = 0;
+    _ad9862_regs.rx_twos_comp = 1;
+    _ad9862_regs.rx_hilbert = ad9862_regs_t::RX_HILBERT_DIS;
+
+    //setup tx side of codec
+    _ad9862_regs.two_data_paths = ad9862_regs_t::TWO_DATA_PATHS_BOTH;
+    _ad9862_regs.interleaved = ad9862_regs_t::INTERLEAVED_INTERLEAVED;
+    _ad9862_regs.tx_pga_gain = 199;
+    _ad9862_regs.tx_hilbert = ad9862_regs_t::TX_HILBERT_DIS;
+    _ad9862_regs.interp = ad9862_regs_t::INTERP_4;
+    _ad9862_regs.tx_twos_comp = 1;
+    _ad9862_regs.fine_mode = ad9862_regs_t::FINE_MODE_NCO;
+    _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_BYPASS;
+    _ad9862_regs.dac_a_coarse_gain = 0x3;
+    _ad9862_regs.dac_b_coarse_gain = 0x3;
+
+    //setup the dll
+    _ad9862_regs.input_clk_ctrl = ad9862_regs_t::INPUT_CLK_CTRL_EXTERNAL;
+    _ad9862_regs.dll_mult = ad9862_regs_t::DLL_MULT_2;
+    _ad9862_regs.dll_mode = ad9862_regs_t::DLL_MODE_FAST;
+
+    //setup clockout
+    _ad9862_regs.clkout2_div_factor = ad9862_regs_t::CLKOUT2_DIV_FACTOR_2;
+
+    //write the register settings to the codec
+    for (uint8_t addr = 0; addr <= 25; addr++) {
+        this->send_reg(addr);
+    }
+
+    //aux adc clock
+    _ad9862_regs.clk_4 = ad9862_regs_t::CLK_4_1_4;
+    this->send_reg(34);
+}
+
+usrp1_codec_ctrl_impl::~usrp1_codec_ctrl_impl(void)
+{
+    //set aux dacs to zero
+    this->write_aux_dac(AUX_DAC_A, 0);
+    this->write_aux_dac(AUX_DAC_B, 0);
+    this->write_aux_dac(AUX_DAC_C, 0);
+    this->write_aux_dac(AUX_DAC_D, 0);
+
+    //power down
+    _ad9862_regs.all_rx_pd = 1;
+    this->send_reg(1);
+    _ad9862_regs.tx_digital_pd = 1;
+    _ad9862_regs.tx_analog_pd = ad9862_regs_t::TX_ANALOG_PD_BOTH;
+    this->send_reg(8);
+}
+
+/***********************************************************************
+ * Codec Control Gain Control Methods
+ **********************************************************************/
+static const int mtpgw = 255; //maximum tx pga gain word
+
+void usrp1_codec_ctrl_impl::set_tx_pga_gain(float gain){
+    int gain_word = int(mtpgw*(gain - tx_pga_gain_range.min)/(tx_pga_gain_range.max - tx_pga_gain_range.min));
+    _ad9862_regs.tx_pga_gain = std::clip(gain_word, 0, mtpgw);
+    this->send_reg(16);
+}
+
+float usrp1_codec_ctrl_impl::get_tx_pga_gain(void){
+    return (_ad9862_regs.tx_pga_gain*(tx_pga_gain_range.max - tx_pga_gain_range.min)/mtpgw) + tx_pga_gain_range.min;
+}
+
+static const int mrpgw = 0x14; //maximum rx pga gain word
+
+void usrp1_codec_ctrl_impl::set_rx_pga_gain(float gain, char which){
+    int gain_word = int(mrpgw*(gain - rx_pga_gain_range.min)/(rx_pga_gain_range.max - rx_pga_gain_range.min));
+    gain_word = std::clip(gain_word, 0, mrpgw);
+    switch(which){
+    case 'A':
+        _ad9862_regs.rx_pga_a = gain_word;
+        this->send_reg(2);
+        return;
+    case 'B':
+        _ad9862_regs.rx_pga_b = gain_word;
+        this->send_reg(3);
+        return;
+    default: UHD_THROW_INVALID_CODE_PATH();
+    }
+}
+
+float usrp1_codec_ctrl_impl::get_rx_pga_gain(char which){
+    int gain_word;
+    switch(which){
+    case 'A': gain_word = _ad9862_regs.rx_pga_a; break;
+    case 'B': gain_word = _ad9862_regs.rx_pga_b; break;
+    default: UHD_THROW_INVALID_CODE_PATH();
+    }
+    return (gain_word*(rx_pga_gain_range.max - rx_pga_gain_range.min)/mrpgw) + rx_pga_gain_range.min;
+}
+
+/***********************************************************************
+ * Codec Control AUX ADC Methods
+ **********************************************************************/
+static float aux_adc_to_volts(boost::uint8_t high, boost::uint8_t low)
+{
+    return float((boost::uint16_t(high) << 2) | low)*3.3/0x3ff;
+}
+
+float usrp1_codec_ctrl_impl::read_aux_adc(aux_adc_t which)
+{
+    //check to see if the switch needs to be set
+    bool write_switch = false;
+    switch(which) {
+
+    case AUX_ADC_A1:
+    case AUX_ADC_A2:
+        if (which != _last_aux_adc_a) {
+            _ad9862_regs.select_a = (which == AUX_ADC_A1)?
+                ad9862_regs_t::SELECT_A_AUX_ADC1: ad9862_regs_t::SELECT_A_AUX_ADC2;
+            _last_aux_adc_a = which;
+            write_switch = true;
+        }
+        break;
+
+    case AUX_ADC_B1:
+    case AUX_ADC_B2:
+        if (which != _last_aux_adc_b) {
+            _ad9862_regs.select_b = (which == AUX_ADC_B1)?
+                ad9862_regs_t::SELECT_B_AUX_ADC1: ad9862_regs_t::SELECT_B_AUX_ADC2;
+            _last_aux_adc_b = which;
+            write_switch = true;
+        }
+        break;
+
+    }
+
+    //write the switch if it changed
+    if(write_switch) this->send_reg(34);
+
+    //map aux adcs to register values to read
+    static const uhd::dict<aux_adc_t, boost::uint8_t> aux_dac_to_addr = boost::assign::map_list_of
+        (AUX_ADC_A2, 26) (AUX_ADC_A1, 28)
+        (AUX_ADC_B2, 30) (AUX_ADC_B1, 32)
+    ;
+
+    //read the value
+    this->recv_reg(aux_dac_to_addr[which]+0);
+    this->recv_reg(aux_dac_to_addr[which]+1);
+
+    //return the value scaled to volts
+    switch(which) {
+    case AUX_ADC_A1: return aux_adc_to_volts(_ad9862_regs.aux_adc_a1_9_2, _ad9862_regs.aux_adc_a1_1_0);
+    case AUX_ADC_A2: return aux_adc_to_volts(_ad9862_regs.aux_adc_a2_9_2, _ad9862_regs.aux_adc_a2_1_0);
+    case AUX_ADC_B1: return aux_adc_to_volts(_ad9862_regs.aux_adc_b1_9_2, _ad9862_regs.aux_adc_b1_1_0);
+    case AUX_ADC_B2: return aux_adc_to_volts(_ad9862_regs.aux_adc_b2_9_2, _ad9862_regs.aux_adc_b2_1_0);
+    }
+    UHD_ASSERT_THROW(false);
+}
+
+/***********************************************************************
+ * Codec Control AUX DAC Methods
+ **********************************************************************/
+void usrp1_codec_ctrl_impl::write_aux_dac(aux_dac_t which, float volts)
+{
+    //special case for aux dac d (aka sigma delta word)
+    if (which == AUX_DAC_D) {
+        boost::uint16_t dac_word = std::clip(boost::math::iround(volts*0xfff/3.3), 0, 0xfff);
+        _ad9862_regs.sig_delt_11_4 = boost::uint8_t(dac_word >> 4);
+        _ad9862_regs.sig_delt_3_0 = boost::uint8_t(dac_word & 0xf);
+        this->send_reg(42);
+        this->send_reg(43);
+        return;
+    }
+
+    //calculate the dac word for aux dac a, b, c
+    boost::uint8_t dac_word = std::clip(boost::math::iround(volts*0xff/3.3), 0, 0xff);
+
+    //setup a lookup table for the aux dac params (reg ref, reg addr)
+    typedef boost::tuple<boost::uint8_t*, boost::uint8_t> dac_params_t;
+    uhd::dict<aux_dac_t, dac_params_t> aux_dac_to_params = boost::assign::map_list_of
+        (AUX_DAC_A, dac_params_t(&_ad9862_regs.aux_dac_a, 36))
+        (AUX_DAC_B, dac_params_t(&_ad9862_regs.aux_dac_b, 37))
+        (AUX_DAC_C, dac_params_t(&_ad9862_regs.aux_dac_c, 38))
+    ;
+
+    //set the aux dac register
+    UHD_ASSERT_THROW(aux_dac_to_params.has_key(which));
+    boost::uint8_t *reg_ref, reg_addr;
+    boost::tie(reg_ref, reg_addr) = aux_dac_to_params[which];
+    *reg_ref = dac_word;
+    this->send_reg(reg_addr);
+}
+
+/***********************************************************************
+ * Codec Control SPI Methods
+ **********************************************************************/
+void usrp1_codec_ctrl_impl::send_reg(boost::uint8_t addr)
+{
+    boost::uint32_t reg = _ad9862_regs.get_write_reg(addr);
+
+    if (codec_debug) {
+        std::cout.fill('0');
+        std::cout << "codec control write reg: 0x";
+        std::cout << std::setw(8) << std::hex << reg << std::endl;
+    }
+    _iface->transact_spi(_spi_slave,
+                         spi_config_t::EDGE_RISE, reg, 16, false);
+}
+
+void usrp1_codec_ctrl_impl::recv_reg(boost::uint8_t addr)
+{
+    boost::uint32_t reg = _ad9862_regs.get_read_reg(addr);
+
+    if (codec_debug) {
+        std::cout.fill('0');
+        std::cout << "codec control read reg: 0x";
+        std::cout << std::setw(8) << std::hex << reg << std::endl;
+    }
+
+    boost::uint32_t ret = _iface->transact_spi(_spi_slave,
+                                        spi_config_t::EDGE_RISE, reg, 16, true);
+
+    if (codec_debug) {
+        std::cout.fill('0');
+        std::cout << "codec control read ret: 0x";
+        std::cout << std::setw(8) << std::hex << ret << std::endl;
+    }
+
+    _ad9862_regs.set_reg(addr, boost::uint16_t(ret));
+}
+
+/***********************************************************************
+ * DUC tuning 
+ **********************************************************************/
+double usrp1_codec_ctrl_impl::coarse_tune(double codec_rate, double freq)
+{
+    double coarse_freq;
+
+    double coarse_freq_1 = codec_rate / 8;
+    double coarse_freq_2 = codec_rate / 4;
+    double coarse_limit_1 = coarse_freq_1 / 2;
+    double coarse_limit_2 = (coarse_freq_1 + coarse_freq_2) / 2;
+    double max_freq = coarse_freq_2 + .09375 * codec_rate;
+ 
+    if (freq < -max_freq) {
+        return false;
+    }
+    else if (freq < -coarse_limit_2) {
+        _ad9862_regs.neg_coarse_tune = ad9862_regs_t::NEG_COARSE_TUNE_NEG_SHIFT;
+        _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_FDAC_4;
+        coarse_freq = -coarse_freq_2;
+    }
+    else if (freq < -coarse_limit_1) {
+        _ad9862_regs.neg_coarse_tune = ad9862_regs_t::NEG_COARSE_TUNE_NEG_SHIFT;
+        _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_FDAC_8;
+        coarse_freq = -coarse_freq_1;
+    }
+    else if (freq < coarse_limit_1) {
+        _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_BYPASS;
+        coarse_freq = 0; 
+    }
+    else if (freq < coarse_limit_2) {
+        _ad9862_regs.neg_coarse_tune = ad9862_regs_t::NEG_COARSE_TUNE_POS_SHIFT;
+        _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_FDAC_8;
+        coarse_freq = coarse_freq_1;
+    }
+    else if (freq <= max_freq) {
+        _ad9862_regs.neg_coarse_tune = ad9862_regs_t::NEG_COARSE_TUNE_POS_SHIFT;
+        _ad9862_regs.coarse_mod = ad9862_regs_t::COARSE_MOD_FDAC_4;
+        coarse_freq = coarse_freq_2;
+    }
+    else {
+        return 0; 
+    }
+
+    return coarse_freq;
+}
+
+double usrp1_codec_ctrl_impl::fine_tune(double codec_rate, double target_freq)
+{
+    static const double scale_factor = std::pow(2.0, 24);
+
+    boost::uint32_t freq_word = boost::uint32_t(
+        boost::math::round(abs((target_freq / codec_rate) * scale_factor)));
+
+    double actual_freq = freq_word * codec_rate / scale_factor;
+
+    if (target_freq < 0) {
+        _ad9862_regs.neg_fine_tune = ad9862_regs_t::NEG_FINE_TUNE_NEG_SHIFT;
+        actual_freq = -actual_freq; 
+    }
+    else {
+        _ad9862_regs.neg_fine_tune = ad9862_regs_t::NEG_FINE_TUNE_POS_SHIFT;
+    } 
+
+    _ad9862_regs.fine_mode = ad9862_regs_t::FINE_MODE_NCO;
+    _ad9862_regs.ftw_23_16 = (freq_word >> 16) & 0xff;
+    _ad9862_regs.ftw_15_8  = (freq_word >>  8) & 0xff;
+    _ad9862_regs.ftw_7_0   = (freq_word >>  0) & 0xff;
+
+    return actual_freq;
+}
+
+void usrp1_codec_ctrl_impl::set_duc_freq(double freq)
+{
+    double codec_rate = _clock_ctrl->get_master_clock_freq() * 2;
+    double coarse_freq = coarse_tune(codec_rate, freq);
+    double fine_freq = fine_tune(codec_rate / 4, freq - coarse_freq);
+
+    if (codec_debug) {
+        std::cout << "ad9862 tuning result:" << std::endl;
+        std::cout << "   requested:   " << freq << std::endl;
+        std::cout << "   actual:      " << coarse_freq + fine_freq << std::endl;
+        std::cout << "   coarse freq: " << coarse_freq << std::endl;
+        std::cout << "   fine freq:   " << fine_freq << std::endl;
+        std::cout << "   codec rate:  " << codec_rate << std::endl;
+    }    
+
+    this->send_reg(20);
+    this->send_reg(21);
+    this->send_reg(22);
+    this->send_reg(23);
+}
+
+/***********************************************************************
+ * Codec Control Make
+ **********************************************************************/
+usrp1_codec_ctrl::sptr usrp1_codec_ctrl::make(usrp1_iface::sptr iface,
+                                              usrp1_clock_ctrl::sptr clock,
+                                              int spi_slave)
+{
+    return sptr(new usrp1_codec_ctrl_impl(iface, clock, spi_slave));
+}
diff --git a/host/lib/usrp/usrp1/codec_ctrl.hpp b/host/lib/usrp/usrp1/codec_ctrl.hpp
new file mode 100644
index 000000000..259d10ef4
--- /dev/null
+++ b/host/lib/usrp/usrp1/codec_ctrl.hpp
@@ -0,0 +1,97 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRP1_CODEC_CTRL_HPP
+#define INCLUDED_USRP1_CODEC_CTRL_HPP
+
+#include "usrp1_iface.hpp"
+#include "clock_ctrl.hpp"
+#include <uhd/types/ranges.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+
+/*!
+ * The usrp1 codec control:
+ * - Init/power down codec.
+ * - Read aux adc, write aux dac.
+ */
+class usrp1_codec_ctrl : boost::noncopyable{
+public:
+    typedef boost::shared_ptr<usrp1_codec_ctrl> sptr;
+
+    static const uhd::gain_range_t tx_pga_gain_range;
+    static const uhd::gain_range_t rx_pga_gain_range;
+
+    /*!
+     * Make a new clock control object.
+     * \param iface the usrp1 iface object
+     * \param spi_slave which spi device
+     * \return the clock control object
+     */
+    static sptr make(usrp1_iface::sptr iface,
+        usrp1_clock_ctrl::sptr clock, int spi_slave
+    );
+
+    //! aux adc identifier constants
+    enum aux_adc_t{
+        AUX_ADC_A2 = 0xA2,
+        AUX_ADC_A1 = 0xA1,
+        AUX_ADC_B2 = 0xB2,
+        AUX_ADC_B1 = 0xB1
+    };
+
+    /*!
+     * Read an auxiliary adc:
+     * The internals remember which aux adc was read last.
+     * Therefore, the aux adc switch is only changed as needed.
+     * \param which which of the 4 adcs
+     * \return a value in volts
+     */
+    virtual float read_aux_adc(aux_adc_t which) = 0;
+
+    //! aux dac identifier constants
+    enum aux_dac_t{
+        AUX_DAC_A = 0xA,
+        AUX_DAC_B = 0xB,
+        AUX_DAC_C = 0xC,
+        AUX_DAC_D = 0xD
+    };
+
+    /*!
+     * Write an auxiliary dac.
+     * \param which which of the 4 dacs
+     * \param volts the level in in volts
+     */
+    virtual void write_aux_dac(aux_dac_t which, float volts) = 0;
+
+    //! Set the TX PGA gain
+    virtual void set_tx_pga_gain(float gain) = 0;
+
+    //! Get the TX PGA gain
+    virtual float get_tx_pga_gain(void) = 0;
+
+    //! Set the RX PGA gain ('A' or 'B')
+    virtual void set_rx_pga_gain(float gain, char which) = 0;
+
+    //! Get the RX PGA gain ('A' or 'B')
+    virtual float get_rx_pga_gain(char which) = 0;
+
+    //! Set the TX modulator frequency
+    virtual void set_duc_freq(double freq) = 0;
+};
+
+#endif /* INCLUDED_USRP1_CODEC_CTRL_HPP */
diff --git a/host/lib/usrp/usrp1/codec_impl.cpp b/host/lib/usrp/usrp1/codec_impl.cpp
new file mode 100644
index 000000000..1756c1ed4
--- /dev/null
+++ b/host/lib/usrp/usrp1/codec_impl.cpp
@@ -0,0 +1,157 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_impl.hpp"
+#include <uhd/utils/assert.hpp>
+#include <uhd/usrp/codec_props.hpp>
+#include <boost/bind.hpp>
+#include <boost/foreach.hpp>
+#include <boost/format.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+/***********************************************************************
+ * Helper Methods
+ **********************************************************************/
+void usrp1_impl::codec_init(void)
+{
+    //make proxies
+    BOOST_FOREACH(dboard_slot_t dboard_slot, _dboard_slots){
+        _rx_codec_proxies[dboard_slot] = wax_obj_proxy::make(
+              boost::bind(&usrp1_impl::rx_codec_get, this, _1, _2, dboard_slot),
+              boost::bind(&usrp1_impl::rx_codec_set, this, _1, _2, dboard_slot));
+
+        _tx_codec_proxies[dboard_slot] = wax_obj_proxy::make(
+              boost::bind(&usrp1_impl::tx_codec_get, this, _1, _2, dboard_slot),
+              boost::bind(&usrp1_impl::tx_codec_set, this, _1, _2, dboard_slot));
+    }
+}    
+
+/***********************************************************************
+ * RX Codec Properties
+ **********************************************************************/
+static const std::string ad9862_pga_gain_name = "ad9862 pga";
+
+void usrp1_impl::rx_codec_get(const wax::obj &key_, wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the get request conditioned on the key
+    switch(key.as<codec_prop_t>()) {
+    case CODEC_PROP_NAME:
+        val = str(boost::format("usrp1 adc - ad9862 - slot %c") % char(dboard_slot));
+        return;
+
+    case CODEC_PROP_OTHERS:
+        val = prop_names_t();
+        return;
+
+    case CODEC_PROP_GAIN_NAMES:
+        val = prop_names_t(1, ad9862_pga_gain_name);
+        return;
+
+    case CODEC_PROP_GAIN_RANGE:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        val = usrp1_codec_ctrl::rx_pga_gain_range;
+        return;
+
+    case CODEC_PROP_GAIN_I:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        val = _codec_ctrls[dboard_slot]->get_rx_pga_gain('A');
+        return;
+
+    case CODEC_PROP_GAIN_Q:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        val = _codec_ctrls[dboard_slot]->get_rx_pga_gain('B');
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+void usrp1_impl::rx_codec_set(const wax::obj &key_, const wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the set request conditioned on the key
+    switch(key.as<codec_prop_t>()) {
+    case CODEC_PROP_GAIN_I:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<float>(), 'A');
+        return;
+
+    case CODEC_PROP_GAIN_Q:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        _codec_ctrls[dboard_slot]->set_rx_pga_gain(val.as<float>(), 'B');
+        return;
+
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * TX Codec Properties
+ **********************************************************************/
+void usrp1_impl::tx_codec_get(const wax::obj &key_, wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the get request conditioned on the key
+    switch(key.as<codec_prop_t>()) {
+    case CODEC_PROP_NAME:
+        val = str(boost::format("usrp1 dac - ad9862 - slot %c") % char(dboard_slot));
+        return;
+
+    case CODEC_PROP_OTHERS:
+        val = prop_names_t();
+        return;
+
+    case CODEC_PROP_GAIN_NAMES:
+        val = prop_names_t(1, ad9862_pga_gain_name);
+        return;
+
+    case CODEC_PROP_GAIN_RANGE:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        val = usrp1_codec_ctrl::tx_pga_gain_range;
+        return;
+
+    case CODEC_PROP_GAIN_I: //only one gain for I and Q
+    case CODEC_PROP_GAIN_Q:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        val = _codec_ctrls[dboard_slot]->get_tx_pga_gain();
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+void usrp1_impl::tx_codec_set(const wax::obj &key_, const wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the set request conditioned on the key
+    switch(key.as<codec_prop_t>()){
+    case CODEC_PROP_GAIN_I: //only one gain for I and Q
+    case CODEC_PROP_GAIN_Q:
+        UHD_ASSERT_THROW(key.name == ad9862_pga_gain_name);
+        _codec_ctrls[dboard_slot]->set_tx_pga_gain(val.as<float>());
+        return;
+
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+}
diff --git a/host/lib/usrp/usrp1/dboard_iface.cpp b/host/lib/usrp/usrp1/dboard_iface.cpp
new file mode 100644
index 000000000..4791b55ce
--- /dev/null
+++ b/host/lib/usrp/usrp1/dboard_iface.cpp
@@ -0,0 +1,371 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_iface.hpp"
+#include "usrp1_impl.hpp"
+#include "fpga_regs_common.h"
+#include "usrp_spi_defs.h"
+#include "fpga_regs_standard.h"
+#include "clock_ctrl.hpp"
+#include "codec_ctrl.hpp"
+#include <uhd/usrp/dboard_iface.hpp>
+#include <uhd/types/dict.hpp>
+#include <uhd/utils/assert.hpp>
+#include <boost/assign/list_of.hpp>
+#include <iostream>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace boost::assign;
+
+class usrp1_dboard_iface : public dboard_iface {
+public:
+
+    usrp1_dboard_iface(usrp1_iface::sptr iface,
+                       usrp1_clock_ctrl::sptr clock,
+                       usrp1_codec_ctrl::sptr codec,
+                       usrp1_impl::dboard_slot_t dboard_slot,
+                       const dboard_id_t &rx_dboard_id
+    ):
+        _dboard_slot(dboard_slot),
+        _rx_dboard_id(rx_dboard_id)
+    {
+        _iface = iface;
+        _clock = clock;
+        _codec = codec;
+
+        //init the clock rate shadows
+        this->set_clock_rate(UNIT_RX, this->get_clock_rates(UNIT_RX).front());
+        this->set_clock_rate(UNIT_TX, this->get_clock_rates(UNIT_TX).front());
+    }
+
+    ~usrp1_dboard_iface()
+    {
+        /* NOP */
+    }
+
+    special_props_t get_special_props()
+    {
+        special_props_t props;
+        props.soft_clock_divider = true;
+        props.mangle_i2c_addrs = (_dboard_slot == usrp1_impl::DBOARD_SLOT_B);
+        return props;
+    }
+
+    void write_aux_dac(unit_t, aux_dac_t, float);
+    float read_aux_adc(unit_t, aux_adc_t);
+
+    void set_pin_ctrl(unit_t, boost::uint16_t);
+    void set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
+    void set_gpio_ddr(unit_t, boost::uint16_t);
+    void write_gpio(unit_t, boost::uint16_t);
+    void set_gpio_debug(unit_t, int);
+    boost::uint16_t read_gpio(unit_t);
+
+    void write_i2c(boost::uint8_t, const byte_vector_t &);
+    byte_vector_t read_i2c(boost::uint8_t, size_t);
+
+    void write_spi(unit_t unit,
+                   const spi_config_t &config,
+                   boost::uint32_t data,
+                   size_t num_bits);
+
+    boost::uint32_t read_write_spi(unit_t unit,
+                                   const spi_config_t &config,
+                                   boost::uint32_t data,
+                                   size_t num_bits);
+
+    void set_clock_rate(unit_t, double);
+    std::vector<double> get_clock_rates(unit_t);
+    double get_clock_rate(unit_t);
+    void set_clock_enabled(unit_t, bool);
+
+private:
+    usrp1_iface::sptr _iface;
+    usrp1_clock_ctrl::sptr _clock;
+    usrp1_codec_ctrl::sptr _codec;
+    uhd::dict<unit_t, double> _clock_rates;
+    const usrp1_impl::dboard_slot_t _dboard_slot;
+    const dboard_id_t &_rx_dboard_id;
+};
+
+/***********************************************************************
+ * Make Function
+ **********************************************************************/
+dboard_iface::sptr usrp1_impl::make_dboard_iface(usrp1_iface::sptr iface,
+                                           usrp1_clock_ctrl::sptr clock,
+                                           usrp1_codec_ctrl::sptr codec,
+                                           dboard_slot_t dboard_slot,
+                                           const dboard_id_t &rx_dboard_id
+){
+    return dboard_iface::sptr(new usrp1_dboard_iface(
+        iface, clock, codec, dboard_slot, rx_dboard_id
+    ));
+}
+
+/***********************************************************************
+ * Clock Rates
+ **********************************************************************/
+static const dboard_id_t dbsrx_classic_id(0x0002);
+
+/*
+ * Daughterboard reference clock register
+ *
+ * Bit  7    - 1 turns on refclk, 0 allows IO use
+ * Bits 6:0  - Divider value
+ */
+void usrp1_dboard_iface::set_clock_rate(unit_t unit, double rate)
+{
+    assert_has(this->get_clock_rates(unit), rate, "dboard clock rate");
+    _clock_rates[unit] = rate;
+
+    if (unit == UNIT_RX && _rx_dboard_id == dbsrx_classic_id){
+        size_t divider = size_t(_clock->get_master_clock_freq()/rate);
+        switch(_dboard_slot){
+        case usrp1_impl::DBOARD_SLOT_A:
+            _iface->poke32(FR_RX_A_REFCLK, (divider & 0x7f) | 0x80);
+            break;
+
+        case usrp1_impl::DBOARD_SLOT_B:
+            _iface->poke32(FR_RX_B_REFCLK, (divider & 0x7f) | 0x80);
+            break;
+        }
+    }
+}
+
+std::vector<double> usrp1_dboard_iface::get_clock_rates(unit_t unit)
+{
+    std::vector<double> rates;
+    if (unit == UNIT_RX && _rx_dboard_id == dbsrx_classic_id){
+        for (size_t div = 1; div <= 127; div++)
+            rates.push_back(_clock->get_master_clock_freq() / div);
+    }
+    else{
+        rates.push_back(_clock->get_master_clock_freq());
+    }
+    return rates;
+}
+
+double usrp1_dboard_iface::get_clock_rate(unit_t unit)
+{
+    return _clock_rates[unit];
+}
+
+void usrp1_dboard_iface::set_clock_enabled(unit_t, bool)
+{
+    //TODO we can only enable for special case anyway...
+}
+
+/***********************************************************************
+ * GPIO
+ **********************************************************************/
+void usrp1_dboard_iface::set_pin_ctrl(unit_t unit, boost::uint16_t value)
+{
+    switch(unit) {
+    case UNIT_RX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+             _iface->poke32(FR_ATR_MASK_1, value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+             _iface->poke32(FR_ATR_MASK_3, value);
+        break;
+    case UNIT_TX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_ATR_MASK_0, value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_ATR_MASK_2, value);
+        break;
+    }
+}
+
+void usrp1_dboard_iface::set_gpio_ddr(unit_t unit, boost::uint16_t value)
+{
+    switch(unit) {
+    case UNIT_RX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_OE_1, 0xffff0000 | value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_OE_3, 0xffff0000 | value);
+        break;
+    case UNIT_TX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_OE_0, 0xffff0000 | value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_OE_2, 0xffff0000 | value);
+        break;
+    }
+}
+
+void usrp1_dboard_iface::write_gpio(unit_t unit, boost::uint16_t value)
+{
+    switch(unit) {
+    case UNIT_RX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_IO_1, 0xffff0000 | value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_IO_3, 0xffff0000 | value);
+        break;
+    case UNIT_TX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_IO_0, 0xffff0000 | value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_IO_2, 0xffff0000 | value);
+        break;
+    }
+}
+
+void usrp1_dboard_iface::set_gpio_debug(unit_t, int)
+{
+    /* NOP */
+}
+
+boost::uint16_t usrp1_dboard_iface::read_gpio(unit_t unit)
+{
+    boost::uint32_t out_value;
+
+    if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+        out_value = _iface->peek32(1);
+    else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+        out_value = _iface->peek32(2);
+    else
+        UHD_THROW_INVALID_CODE_PATH();
+
+    switch(unit) {
+    case UNIT_RX:
+        return (boost::uint16_t)((out_value >> 16) & 0x0000ffff);
+    case UNIT_TX:
+        return (boost::uint16_t)((out_value >>  0) & 0x0000ffff);
+    }
+    UHD_ASSERT_THROW(false);
+}
+
+void usrp1_dboard_iface::set_atr_reg(unit_t unit,
+                                     atr_reg_t atr, boost::uint16_t value)
+{
+    // Ignore unsupported states
+    if ((atr == ATR_REG_IDLE) || (atr == ATR_REG_FULL_DUPLEX))
+        return;
+
+    switch(unit) {
+    case UNIT_RX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_ATR_RXVAL_1, value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_ATR_RXVAL_3, value);
+        break;
+    case UNIT_TX:
+        if (_dboard_slot == usrp1_impl::DBOARD_SLOT_A)
+            _iface->poke32(FR_ATR_TXVAL_0, value);
+        else if (_dboard_slot == usrp1_impl::DBOARD_SLOT_B)
+            _iface->poke32(FR_ATR_TXVAL_2, value);
+        break;
+    }
+}
+/***********************************************************************
+ * SPI
+ **********************************************************************/
+/*!
+ * Static function to convert a unit type to a spi slave device number.
+ * \param unit the dboard interface unit type enum
+ * \param slot the side (A or B) the dboard is attached
+ * \return the slave device number
+ */
+static boost::uint32_t unit_to_otw_spi_dev(dboard_iface::unit_t unit,
+                                           usrp1_impl::dboard_slot_t slot)
+{
+    switch(unit) {
+    case dboard_iface::UNIT_TX:
+        if (slot == usrp1_impl::DBOARD_SLOT_A)
+            return SPI_ENABLE_TX_A;
+        else if (slot == usrp1_impl::DBOARD_SLOT_B)
+            return SPI_ENABLE_TX_B;
+        else
+            break;
+    case dboard_iface::UNIT_RX:
+        if (slot == usrp1_impl::DBOARD_SLOT_A)
+            return SPI_ENABLE_RX_A;
+        else if (slot == usrp1_impl::DBOARD_SLOT_B)
+            return SPI_ENABLE_RX_B;
+        else
+            break;
+    }
+    throw std::invalid_argument("unknown unit type");
+}
+
+void usrp1_dboard_iface::write_spi(unit_t unit,
+                                   const spi_config_t &config,
+                                   boost::uint32_t data,
+                                   size_t num_bits)
+{
+    _iface->transact_spi(unit_to_otw_spi_dev(unit, _dboard_slot),
+                         config, data, num_bits, false);
+}
+
+boost::uint32_t usrp1_dboard_iface::read_write_spi(unit_t unit,
+                                                   const spi_config_t &config,
+                                                   boost::uint32_t data,
+                                                   size_t num_bits)
+{
+    return _iface->transact_spi(unit_to_otw_spi_dev(unit, _dboard_slot),
+                                config, data, num_bits, true);
+}
+
+/***********************************************************************
+ * I2C
+ **********************************************************************/
+void usrp1_dboard_iface::write_i2c(boost::uint8_t addr,
+                                   const byte_vector_t &bytes)
+{
+    return _iface->write_i2c(addr, bytes);
+}
+
+byte_vector_t usrp1_dboard_iface::read_i2c(boost::uint8_t addr,
+                                           size_t num_bytes)
+{
+    return _iface->read_i2c(addr, num_bytes);
+}
+
+/***********************************************************************
+ * Aux DAX/ADC
+ **********************************************************************/
+void usrp1_dboard_iface::write_aux_dac(dboard_iface::unit_t,
+                                       aux_dac_t which, float value)
+{
+    //same aux dacs for each unit
+    static const uhd::dict<aux_dac_t, usrp1_codec_ctrl::aux_dac_t>
+        which_to_aux_dac = map_list_of
+                                     (AUX_DAC_A, usrp1_codec_ctrl::AUX_DAC_A)
+                                     (AUX_DAC_B, usrp1_codec_ctrl::AUX_DAC_B)
+                                     (AUX_DAC_C, usrp1_codec_ctrl::AUX_DAC_C)
+                                     (AUX_DAC_D, usrp1_codec_ctrl::AUX_DAC_D);
+
+    _codec->write_aux_dac(which_to_aux_dac[which], value);
+}
+
+float usrp1_dboard_iface::read_aux_adc(dboard_iface::unit_t unit,
+                                       aux_adc_t which)
+{
+    static const
+    uhd::dict<unit_t, uhd::dict<aux_adc_t, usrp1_codec_ctrl::aux_adc_t> >
+        unit_to_which_to_aux_adc = map_list_of(UNIT_RX, map_list_of
+                                    (AUX_ADC_A, usrp1_codec_ctrl::AUX_ADC_A1)
+                                    (AUX_ADC_B, usrp1_codec_ctrl::AUX_ADC_B1))
+                                              (UNIT_TX, map_list_of
+                                    (AUX_ADC_A, usrp1_codec_ctrl::AUX_ADC_A2)
+                                    (AUX_ADC_B, usrp1_codec_ctrl::AUX_ADC_B2));
+
+    return _codec->read_aux_adc(unit_to_which_to_aux_adc[unit][which]);
+}
diff --git a/host/lib/usrp/usrp1/dboard_impl.cpp b/host/lib/usrp/usrp1/dboard_impl.cpp
new file mode 100644
index 000000000..3a8480e1b
--- /dev/null
+++ b/host/lib/usrp/usrp1/dboard_impl.cpp
@@ -0,0 +1,217 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_impl.hpp"
+#include "usrp_i2c_addr.h"
+#include <uhd/usrp/dsp_utils.hpp>
+#include <uhd/usrp/misc_utils.hpp>
+#include <uhd/utils/assert.hpp>
+#include <uhd/usrp/dboard_props.hpp>
+#include <uhd/usrp/subdev_props.hpp>
+#include <boost/bind.hpp>
+#include <boost/foreach.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+static boost::uint8_t get_rx_ee_addr(usrp1_impl::dboard_slot_t dboard_slot){
+    switch(dboard_slot){
+    case usrp1_impl::DBOARD_SLOT_A: return I2C_ADDR_RX_A;
+    case usrp1_impl::DBOARD_SLOT_B: return I2C_ADDR_RX_B;
+    default: UHD_THROW_INVALID_CODE_PATH();
+    }
+}
+
+static boost::uint8_t get_tx_ee_addr(usrp1_impl::dboard_slot_t dboard_slot){
+    switch(dboard_slot){
+    case usrp1_impl::DBOARD_SLOT_A: return I2C_ADDR_TX_A;
+    case usrp1_impl::DBOARD_SLOT_B: return I2C_ADDR_TX_B;
+    default: UHD_THROW_INVALID_CODE_PATH();
+    }
+}
+
+/***********************************************************************
+ * Dboard Initialization
+ **********************************************************************/
+void usrp1_impl::dboard_init(void)
+{
+    BOOST_FOREACH(dboard_slot_t dboard_slot, _dboard_slots){
+
+        //read the tx and rx dboard eeproms
+        _rx_db_eeproms[dboard_slot] = dboard_eeprom_t(_iface->read_eeprom(
+            get_rx_ee_addr(dboard_slot), 0, dboard_eeprom_t::num_bytes()
+        ));
+
+        _tx_db_eeproms[dboard_slot] = dboard_eeprom_t(_iface->read_eeprom(
+            get_tx_ee_addr(dboard_slot), 0, dboard_eeprom_t::num_bytes()
+        ));
+
+        //create a new dboard interface and manager
+        _dboard_ifaces[dboard_slot] = make_dboard_iface(
+            _iface, _clock_ctrl, _codec_ctrls[dboard_slot],
+            dboard_slot, _rx_db_eeproms[dboard_slot].id
+        );
+
+        _dboard_managers[dboard_slot] = dboard_manager::make(
+            _rx_db_eeproms[dboard_slot].id,
+            _tx_db_eeproms[dboard_slot].id,
+            _dboard_ifaces[dboard_slot]
+        );
+
+        //setup the dboard proxies
+        _rx_dboard_proxies[dboard_slot] = wax_obj_proxy::make(
+             boost::bind(&usrp1_impl::rx_dboard_get, this, _1, _2, dboard_slot),
+             boost::bind(&usrp1_impl::rx_dboard_set, this, _1, _2, dboard_slot));
+
+        _tx_dboard_proxies[dboard_slot] = wax_obj_proxy::make(
+             boost::bind(&usrp1_impl::tx_dboard_get, this, _1, _2, dboard_slot),
+             boost::bind(&usrp1_impl::tx_dboard_set, this, _1, _2, dboard_slot));
+    }
+
+}
+
+/***********************************************************************
+ * RX Dboard Get
+ **********************************************************************/
+void usrp1_impl::rx_dboard_get(const wax::obj &key_, wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the get request conditioned on the key
+    switch(key.as<dboard_prop_t>()){
+    case DBOARD_PROP_NAME:
+        val = str(boost::format("usrp1 dboard (rx unit) - %c") % char(dboard_slot));
+        return;
+
+    case DBOARD_PROP_SUBDEV:
+        val = _dboard_managers[dboard_slot]->get_rx_subdev(key.name);
+        return;
+
+    case DBOARD_PROP_SUBDEV_NAMES:
+        val = _dboard_managers[dboard_slot]->get_rx_subdev_names();
+        return;
+
+    case DBOARD_PROP_DBOARD_ID:
+        val = _rx_db_eeproms[dboard_slot].id;
+        return;
+
+    case DBOARD_PROP_DBOARD_IFACE:
+        val = _dboard_ifaces[dboard_slot];
+        return;
+
+    case DBOARD_PROP_CODEC:
+        val = _rx_codec_proxies[dboard_slot]->get_link();
+        return;
+
+    case DBOARD_PROP_GAIN_GROUP:
+        val = make_gain_group(
+            _dboard_managers[dboard_slot]->get_rx_subdev(key.name),
+            _rx_codec_proxies[dboard_slot]->get_link(),
+            GAIN_GROUP_POLICY_RX
+        );
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * RX Dboard Set
+ **********************************************************************/
+void usrp1_impl::rx_dboard_set(const wax::obj &key, const wax::obj &val, dboard_slot_t dboard_slot)
+{
+    switch(key.as<dboard_prop_t>()) {
+    case DBOARD_PROP_DBOARD_ID:
+        _rx_db_eeproms[dboard_slot].id = val.as<dboard_id_t>();
+        _iface->write_eeprom(
+            get_rx_ee_addr(dboard_slot), 0,
+            _rx_db_eeproms[dboard_slot].get_eeprom_bytes()
+        );
+        return;
+
+    default:
+        UHD_THROW_PROP_SET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * TX Dboard Get
+ **********************************************************************/
+void usrp1_impl::tx_dboard_get(const wax::obj &key_, wax::obj &val, dboard_slot_t dboard_slot)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the get request conditioned on the key
+    switch(key.as<dboard_prop_t>()){
+    case DBOARD_PROP_NAME:
+        val = str(boost::format("usrp1 dboard (tx unit) - %c") % char(dboard_slot));
+        return;
+
+    case DBOARD_PROP_SUBDEV:
+        val = _dboard_managers[dboard_slot]->get_tx_subdev(key.name);
+        return;
+
+    case DBOARD_PROP_SUBDEV_NAMES:
+        val = _dboard_managers[dboard_slot]->get_tx_subdev_names();
+        return;
+
+    case DBOARD_PROP_DBOARD_ID:
+        val = _tx_db_eeproms[dboard_slot].id;
+        return;
+
+    case DBOARD_PROP_DBOARD_IFACE:
+        val = _dboard_ifaces[dboard_slot];
+        return;
+
+    case DBOARD_PROP_CODEC:
+        val = _tx_codec_proxies[dboard_slot]->get_link();
+        return;
+
+    case DBOARD_PROP_GAIN_GROUP:
+        val = make_gain_group(
+            _dboard_managers[dboard_slot]->get_tx_subdev(key.name),
+            _tx_codec_proxies[dboard_slot]->get_link(),
+            GAIN_GROUP_POLICY_TX
+        );
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * TX Dboard Set
+ **********************************************************************/
+void usrp1_impl::tx_dboard_set(const wax::obj &key, const wax::obj &val, dboard_slot_t dboard_slot)
+{
+    switch(key.as<dboard_prop_t>()) {
+    case DBOARD_PROP_DBOARD_ID:
+        _tx_db_eeproms[dboard_slot].id = val.as<dboard_id_t>();
+        _iface->write_eeprom(
+            get_tx_ee_addr(dboard_slot), 0,
+            _tx_db_eeproms[dboard_slot].get_eeprom_bytes()
+        );
+        return;
+
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+}
diff --git a/host/lib/usrp/usrp1/dsp_impl.cpp b/host/lib/usrp/usrp1/dsp_impl.cpp
new file mode 100644
index 000000000..d5a88fa2d
--- /dev/null
+++ b/host/lib/usrp/usrp1/dsp_impl.cpp
@@ -0,0 +1,205 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_impl.hpp"
+#include "fpga_regs_standard.h"
+#include <uhd/usrp/dsp_utils.hpp>
+#include <uhd/usrp/dsp_props.hpp>
+#include <boost/bind.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+#include <cmath>
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+/***********************************************************************
+ * RX DDC Initialization
+ **********************************************************************/
+void usrp1_impl::rx_dsp_init(void)
+{
+    _rx_dsp_proxy = wax_obj_proxy::make(
+        boost::bind(&usrp1_impl::rx_dsp_get, this, _1, _2),
+        boost::bind(&usrp1_impl::rx_dsp_set, this, _1, _2));
+
+    rx_dsp_set(DSP_PROP_HOST_RATE, _clock_ctrl->get_master_clock_freq() / 16);
+}
+
+/***********************************************************************
+ * RX DDC Get
+ **********************************************************************/
+void usrp1_impl::rx_dsp_get(const wax::obj &key, wax::obj &val)
+{
+    switch(key.as<dsp_prop_t>()){
+    case DSP_PROP_NAME:
+        val = std::string("usrp1 ddc0");
+        return;
+
+    case DSP_PROP_OTHERS:
+        val = prop_names_t();
+        return;
+
+    case DSP_PROP_FREQ_SHIFT:
+        val = _rx_dsp_freq;
+        return;
+
+    case DSP_PROP_CODEC_RATE:
+        val = _clock_ctrl->get_master_clock_freq();
+        return;
+
+    case DSP_PROP_HOST_RATE:
+        val = _clock_ctrl->get_master_clock_freq()/_rx_dsp_decim;
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+
+}
+
+/***********************************************************************
+ * RX DDC Set
+ **********************************************************************/
+void usrp1_impl::rx_dsp_set(const wax::obj &key, const wax::obj &val)
+{
+    switch(key.as<dsp_prop_t>()) {
+    case DSP_PROP_FREQ_SHIFT: {
+            double new_freq = val.as<double>();
+            boost::uint32_t reg_word = dsp_type1::calc_cordic_word_and_update(
+                new_freq, _clock_ctrl->get_master_clock_freq());
+
+            //TODO TODO TODO TODO TODO TODO TODO TODO TODO 
+            //
+            // Handle multiple receive channels / DDC's
+            //
+            //TODO TODO TODO TODO TODO TODO TODO TODO TODO
+            _iface->poke32(FR_RX_FREQ_0, reg_word);
+            _iface->poke32(FR_RX_FREQ_1, reg_word);
+            _iface->poke32(FR_RX_FREQ_2, reg_word);
+            _iface->poke32(FR_RX_FREQ_3, reg_word);
+
+            _rx_dsp_freq = new_freq;
+            return;
+        }
+    case DSP_PROP_HOST_RATE: {
+            unsigned int rate =
+                    _clock_ctrl->get_master_clock_freq() / val.as<double>();
+
+            if ((rate & 0x01) || (rate < 4) || (rate > 256)) {
+                std::cerr << "Decimation must be even and between 4 and 256"
+                          << std::endl;
+                return;
+            }
+
+            _rx_dsp_decim = rate;
+            //TODO Poll every 100ms. Make it selectable?
+            _rx_samps_per_poll_interval = 0.1 * _clock_ctrl->get_master_clock_freq() / rate;
+
+            _iface->poke32(FR_DECIM_RATE, _rx_dsp_decim/2 - 1);
+        }
+        return;
+
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+
+}
+
+/***********************************************************************
+ * TX DUC Initialization
+ **********************************************************************/
+void usrp1_impl::tx_dsp_init(void)
+{
+    _tx_dsp_proxy = wax_obj_proxy::make(
+                          boost::bind(&usrp1_impl::tx_dsp_get, this, _1, _2),
+                          boost::bind(&usrp1_impl::tx_dsp_set, this, _1, _2));
+
+    //initial config and update
+    tx_dsp_set(DSP_PROP_HOST_RATE, _clock_ctrl->get_master_clock_freq() * 2 / 16);
+}
+
+/***********************************************************************
+ * TX DUC Get
+ **********************************************************************/
+void usrp1_impl::tx_dsp_get(const wax::obj &key, wax::obj &val)
+{
+    switch(key.as<dsp_prop_t>()) {
+    case DSP_PROP_NAME:
+        val = std::string("usrp1 duc0");
+        return;
+
+    case DSP_PROP_OTHERS:
+        val = prop_names_t(); //empty
+        return;
+
+    case DSP_PROP_FREQ_SHIFT:
+        val = _tx_dsp_freq;
+        return;
+
+    case DSP_PROP_CODEC_RATE:
+        val = _clock_ctrl->get_master_clock_freq() * 2;
+        return;
+
+    case DSP_PROP_HOST_RATE:
+        val = _clock_ctrl->get_master_clock_freq() * 2 / _tx_dsp_interp;
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+
+}
+
+/***********************************************************************
+ * TX DUC Set
+ **********************************************************************/
+void usrp1_impl::tx_dsp_set(const wax::obj &key, const wax::obj &val)
+{
+    switch(key.as<dsp_prop_t>()) {
+
+    //TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO
+    //
+    // Set both codec frequencies until we have duality properties 
+    //
+    //TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO
+    case DSP_PROP_FREQ_SHIFT: {
+            double new_freq = val.as<double>();
+            _codec_ctrls[DBOARD_SLOT_A]->set_duc_freq(new_freq);
+            _codec_ctrls[DBOARD_SLOT_B]->set_duc_freq(new_freq);
+            _tx_dsp_freq = new_freq;
+            return;
+        }
+
+    case DSP_PROP_HOST_RATE: {
+            unsigned int rate =
+                    _clock_ctrl->get_master_clock_freq() * 2 / val.as<double>();
+
+            if ((rate & 0x01) || (rate < 8) || (rate > 512)) {
+                std::cerr << "Interpolation rate must be even and between 8 and 512"
+                          << std::endl;
+                return;
+            }
+
+            _tx_dsp_interp = rate;
+
+            //TODO Poll every 100ms. Make it selectable? 
+            _tx_samps_per_poll_interval = 0.1 * _clock_ctrl->get_master_clock_freq() * 2 / rate;
+
+            _iface->poke32(FR_INTERP_RATE, _tx_dsp_interp / 4 - 1);
+            return;
+        }
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+
+}
diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp
new file mode 100644
index 000000000..92e8bc20a
--- /dev/null
+++ b/host/lib/usrp/usrp1/io_impl.cpp
@@ -0,0 +1,326 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "../../transport/vrt_packet_handler.hpp"
+#include "usrp_commands.h"
+#include "usrp1_impl.hpp"
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/transport/convert_types.hpp>
+#include <uhd/transport/bounded_buffer.hpp>
+#include <boost/bind.hpp>
+#include <boost/format.hpp>
+#include <boost/asio.hpp>
+#include <boost/bind.hpp>
+#include <boost/thread.hpp>
+#include <iostream>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+namespace asio = boost::asio;
+
+struct usrp1_send_state {
+    uhd::transport::managed_send_buffer::sptr send_buff;
+    size_t bytes_written;
+    size_t underrun_poll_samp_count;
+
+    size_t bytes_free()
+    {
+        if (send_buff != NULL)
+            return send_buff->size() - bytes_written;
+        else
+            return 0;
+    }
+};
+
+struct usrp1_recv_state {
+    uhd::transport::managed_recv_buffer::sptr recv_buff;
+    size_t bytes_read;
+    size_t overrun_poll_samp_count;
+
+    size_t bytes_avail()
+    {
+        if (recv_buff != NULL)
+            return recv_buff->size() - bytes_read;
+        else
+            return 0;
+    }
+};
+
+/***********************************************************************
+ * IO Implementation Details
+ **********************************************************************/
+struct usrp1_impl::io_impl {
+    io_impl();
+    ~io_impl(void);
+
+    //state handling for buffer management 
+    usrp1_recv_state recv_state;
+    usrp1_send_state send_state;
+
+    //send transport management 
+    bool get_send_buffer(zero_copy_if::sptr zc_if);
+    size_t copy_convert_send_samps(const void *buff, size_t num_samps,
+                              size_t sample_offset, const io_type_t io_type,
+                              otw_type_t otw_type);
+    bool conditional_buff_commit(bool force);
+    bool check_underrun(usrp_ctrl::sptr ctrl_if,
+                        size_t poll_interval, bool force);
+
+    //recv transport management 
+    bool get_recv_buffer(zero_copy_if::sptr zc_if);
+    size_t copy_convert_recv_samps(void *buff, size_t num_samps,
+                              size_t sample_offset, const io_type_t io_type,
+                              otw_type_t otw_type);
+    bool check_overrun(usrp_ctrl::sptr ctrl_if,
+                        size_t poll_interval, bool force);
+};
+
+usrp1_impl::io_impl::io_impl()
+{
+    send_state.send_buff = uhd::transport::managed_send_buffer::sptr();
+    recv_state.recv_buff = uhd::transport::managed_recv_buffer::sptr();
+}
+
+usrp1_impl::io_impl::~io_impl(void)
+{
+   /* NOP */
+}
+
+void usrp1_impl::io_init(void)
+{
+    _rx_otw_type.width = 16;
+    _rx_otw_type.shift = 0;
+    _rx_otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN;
+
+    _tx_otw_type.width = 16;
+    _tx_otw_type.shift = 0;
+    _tx_otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN;
+
+    _io_impl = UHD_PIMPL_MAKE(io_impl, ());
+}
+
+/***********************************************************************
+ * Data Send
+ **********************************************************************/
+bool usrp1_impl::io_impl::get_send_buffer(zero_copy_if::sptr zc_if)
+{
+    if (send_state.send_buff == NULL) {
+
+        send_state.send_buff = zc_if->get_send_buff();
+        if (send_state.send_buff == NULL)
+            return false;
+
+        send_state.bytes_written = 0;
+    }
+
+    return true;
+}
+
+size_t usrp1_impl::io_impl::copy_convert_send_samps(const void *buff,
+                                                    size_t num_samps,
+                                                    size_t sample_offset,
+                                                    const io_type_t io_type,
+                                                    otw_type_t otw_type)
+{
+    UHD_ASSERT_THROW(send_state.bytes_free() % otw_type.get_sample_size() == 0);
+
+    size_t samps_free = send_state.bytes_free() / otw_type.get_sample_size();
+    size_t copy_samps = std::min(num_samps - sample_offset, samps_free); 
+
+    const boost::uint8_t *io_mem =
+        reinterpret_cast<const boost::uint8_t *>(buff);
+
+    boost::uint8_t *otw_mem = send_state.send_buff->cast<boost::uint8_t *>();
+
+    convert_io_type_to_otw_type(io_mem + sample_offset * io_type.size,
+                                io_type,
+                                otw_mem + send_state.bytes_written,
+                                otw_type,
+                                copy_samps);
+
+    send_state.bytes_written += copy_samps * otw_type.get_sample_size();
+    send_state.underrun_poll_samp_count += copy_samps;
+
+    return copy_samps;
+}
+
+bool usrp1_impl::io_impl::conditional_buff_commit(bool force)
+{
+    if (send_state.bytes_written % 512)
+        return false;
+
+    if (force || send_state.bytes_free() == 0) {
+        send_state.send_buff->commit(send_state.bytes_written);
+        send_state.send_buff = uhd::transport::managed_send_buffer::sptr();
+        return true;
+    }
+    
+    return false;
+}
+
+bool usrp1_impl::io_impl::check_underrun(usrp_ctrl::sptr ctrl_if,
+                                         size_t poll_interval,
+                                         bool force)
+{
+    unsigned char underrun = 0;
+
+    bool ready_to_poll = send_state.underrun_poll_samp_count > poll_interval;
+
+    if (force || ready_to_poll) {
+        int ret = ctrl_if->usrp_control_read(VRQ_GET_STATUS,
+                                             0,
+                                             GS_TX_UNDERRUN,
+                                             &underrun, sizeof(char));
+        if (ret < 0)
+            std::cerr << "USRP: underrun check failed" << std::endl;
+        if (underrun)
+            std::cerr << "U" << std::flush;
+
+        send_state.underrun_poll_samp_count = 0;
+    }
+
+    return (bool) underrun;
+}
+
+size_t usrp1_impl::send(const std::vector<const void *> &buffs,
+                        size_t num_samps,
+                        const tx_metadata_t &,
+                        const io_type_t &io_type,
+                        send_mode_t)
+{
+    UHD_ASSERT_THROW(buffs.size() == 1);
+
+    size_t total_samps_sent = 0;
+
+    while (total_samps_sent < num_samps) {
+        if (!_io_impl->get_send_buffer(_data_transport))
+            return 0;
+
+        total_samps_sent += _io_impl->copy_convert_send_samps(buffs[0],
+                                                              num_samps,
+                                                              total_samps_sent,
+                                                              io_type,
+                                                              _tx_otw_type);
+        if (total_samps_sent == num_samps)
+            _io_impl->conditional_buff_commit(true);
+        else
+            _io_impl->conditional_buff_commit(false);
+
+        _io_impl->check_underrun(_ctrl_transport,
+                                 _tx_samps_per_poll_interval, false);
+    }
+
+    return total_samps_sent;
+}
+
+/***********************************************************************
+ * Data Recv
+ **********************************************************************/
+bool usrp1_impl::io_impl::get_recv_buffer(zero_copy_if::sptr zc_if)
+{
+    if ((recv_state.recv_buff == NULL) || (recv_state.bytes_avail() == 0)) {
+
+        recv_state.recv_buff = zc_if->get_recv_buff();
+        if (recv_state.recv_buff == NULL)
+            return false;
+
+        recv_state.bytes_read = 0;
+    }
+
+    return true;
+}
+
+size_t usrp1_impl::io_impl::copy_convert_recv_samps(void *buff,
+                                                    size_t num_samps,
+                                                    size_t sample_offset,
+                                                    const io_type_t io_type,
+                                                    otw_type_t otw_type)
+{
+    UHD_ASSERT_THROW(recv_state.bytes_avail() % otw_type.get_sample_size() == 0);
+
+    size_t samps_avail = recv_state.bytes_avail() / otw_type.get_sample_size();
+    size_t copy_samps = std::min(num_samps - sample_offset, samps_avail); 
+
+    const boost::uint8_t *otw_mem =
+        recv_state.recv_buff->cast<const boost::uint8_t *>();
+
+    boost::uint8_t *io_mem = reinterpret_cast<boost::uint8_t *>(buff);
+
+    convert_otw_type_to_io_type(otw_mem + recv_state.bytes_read,
+                                otw_type,
+                                io_mem + sample_offset * io_type.size,
+                                io_type,
+                                copy_samps);
+
+    recv_state.bytes_read += copy_samps * otw_type.get_sample_size();
+    recv_state.overrun_poll_samp_count += copy_samps;
+
+    return copy_samps;
+}
+
+bool usrp1_impl::io_impl::check_overrun(usrp_ctrl::sptr ctrl_if,
+                                        size_t poll_interval,
+                                        bool force)
+{
+    unsigned char overrun = 0;
+
+    bool ready_to_poll = recv_state.overrun_poll_samp_count > poll_interval;
+
+    if (force || ready_to_poll) {
+        int ret = ctrl_if->usrp_control_read(VRQ_GET_STATUS,
+                                             0,
+                                             GS_RX_OVERRUN,
+                                             &overrun, sizeof(char));
+        if (ret < 0)
+            std::cerr << "USRP: overrrun check failed" << std::endl;
+        if (overrun)
+            std::cerr << "O" << std::flush;
+
+        recv_state.overrun_poll_samp_count = 0;
+    }
+
+    return (bool) overrun;
+}
+
+size_t usrp1_impl::recv(const std::vector<void *> &buffs,
+                        size_t num_samps,
+                        rx_metadata_t &,
+                        const io_type_t &io_type,
+                        recv_mode_t,
+                        size_t)
+{
+    UHD_ASSERT_THROW(buffs.size() == 1);
+
+    size_t total_samps_recv = 0;
+
+    while (total_samps_recv < num_samps) {
+
+        if (!_io_impl->get_recv_buffer(_data_transport))
+            return 0;
+
+        total_samps_recv += _io_impl->copy_convert_recv_samps(buffs[0],
+                                                              num_samps,
+                                                              total_samps_recv,
+                                                              io_type,
+                                                              _rx_otw_type);
+        _io_impl->check_overrun(_ctrl_transport,
+                                _rx_samps_per_poll_interval, false);
+    }
+
+    return total_samps_recv; 
+}
diff --git a/host/lib/usrp/usrp1/mboard_impl.cpp b/host/lib/usrp/usrp1/mboard_impl.cpp
new file mode 100644
index 000000000..a90532cb8
--- /dev/null
+++ b/host/lib/usrp/usrp1/mboard_impl.cpp
@@ -0,0 +1,382 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_impl.hpp"
+#include "usrp_commands.h"
+#include "fpga_regs_standard.h"
+#include "fpga_regs_common.h"
+#include "usrp_i2c_addr.h"
+#include <uhd/usrp/misc_utils.hpp>
+#include <uhd/usrp/mboard_props.hpp>
+#include <uhd/usrp/dboard_props.hpp>
+#include <uhd/usrp/subdev_props.hpp>
+#include <uhd/utils/warning.hpp>
+#include <uhd/utils/assert.hpp>
+#include <uhd/utils/images.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/foreach.hpp>
+#include <boost/bind.hpp>
+#include <boost/thread/thread.hpp>
+#include <iostream>
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+/***********************************************************************
+ * Calculate the RX mux value:
+ *    The I and Q mux values are intentionally reversed to flip I and Q
+ *    to account for the reversal in the type conversion routines.
+ **********************************************************************/
+static int calc_rx_mux_pair(int adc_for_i, int adc_for_q){
+    return (adc_for_i << 2) | (adc_for_q << 0); //shift reversal here
+}
+
+/*!
+ *    3                   2                   1                   0
+ *  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * +-----------------------+-------+-------+-------+-------+-+-----+
+ * |      must be zero     | Q3| I3| Q2| I2| Q1| I1| Q0| I0|Z| NCH |
+ * +-----------------------+-------+-------+-------+-------+-+-----+
+ */
+static boost::uint32_t calc_rx_mux(
+    const subdev_spec_t &subdev_spec, wax::obj mboard
+){
+    //create look-up-table for mapping dboard name and connection type to ADC flags
+    static const int ADC0 = 0, ADC1 = 1, ADC2 = 2, ADC3 = 3;
+    static const uhd::dict<std::string, uhd::dict<subdev_conn_t, int> > name_to_conn_to_flag = boost::assign::map_list_of
+        ("A", boost::assign::map_list_of
+            (SUBDEV_CONN_COMPLEX_IQ, calc_rx_mux_pair(ADC0, ADC1)) //I and Q
+            (SUBDEV_CONN_COMPLEX_QI, calc_rx_mux_pair(ADC1, ADC0)) //I and Q
+            (SUBDEV_CONN_REAL_I,     calc_rx_mux_pair(ADC0, ADC0)) //I and Q (Q identical but ignored Z=1)
+            (SUBDEV_CONN_REAL_Q,     calc_rx_mux_pair(ADC1, ADC1)) //I and Q (Q identical but ignored Z=1)
+        )
+        ("B", boost::assign::map_list_of
+            (SUBDEV_CONN_COMPLEX_IQ, calc_rx_mux_pair(ADC2, ADC3)) //I and Q
+            (SUBDEV_CONN_COMPLEX_QI, calc_rx_mux_pair(ADC3, ADC2)) //I and Q
+            (SUBDEV_CONN_REAL_I,     calc_rx_mux_pair(ADC2, ADC2)) //I and Q (Q identical but ignored Z=1)
+            (SUBDEV_CONN_REAL_Q,     calc_rx_mux_pair(ADC3, ADC3)) //I and Q (Q identical but ignored Z=1)
+        )
+    ;
+
+    //extract the number of channels
+    size_t nchan = subdev_spec.size();
+
+    //calculate the channel flags
+    int channel_flags = 0;
+    size_t num_reals = 0, num_quads = 0;
+    BOOST_FOREACH(const subdev_spec_pair_t &pair, subdev_spec){
+        wax::obj dboard = mboard[named_prop_t(MBOARD_PROP_RX_DBOARD, pair.db_name)];
+        wax::obj subdev = dboard[named_prop_t(DBOARD_PROP_SUBDEV, pair.sd_name)];
+        subdev_conn_t conn = subdev[SUBDEV_PROP_CONNECTION].as<subdev_conn_t>();
+        switch(conn){
+        case SUBDEV_CONN_COMPLEX_IQ:
+        case SUBDEV_CONN_COMPLEX_QI: num_quads++; break;
+        case SUBDEV_CONN_REAL_I:
+        case SUBDEV_CONN_REAL_Q:     num_reals++; break;
+        }
+        channel_flags = (channel_flags << 4) | name_to_conn_to_flag[pair.db_name][conn];
+    }
+
+    //calculate Z:
+    //    for all real sources: Z = 1
+    //    for all quadrature sources: Z = 0
+    //    for mixed sources: warning + Z = 0
+    int Z = (num_quads > 0)? 0 : 1;
+    if (num_quads != 0 and num_reals != 0) uhd::print_warning(
+        "Mixing real and quadrature rx subdevices is not supported.\n"
+        "The Q input to the real source(s) will be non-zero.\n"
+    );
+
+    //calculate the rx mux value
+    return ((channel_flags & 0xffff) << 4) | ((Z & 0x1) << 3) | ((nchan & 0x7) << 0);
+}
+
+/***********************************************************************
+ * Calculate the TX mux value:
+ *    The I and Q mux values are intentionally reversed to flip I and Q
+ *    to account for the reversal in the type conversion routines.
+ **********************************************************************/
+static int calc_tx_mux_pair(int chn_for_i, int chn_for_q){
+    return (chn_for_i << 4) | (chn_for_q << 0); //shift reversal here
+}
+
+/*!
+ *    3                   2                   1                   0
+ *  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * +-----------------------+-------+-------+-------+-------+-+-----+
+ * |                       | DAC1Q | DAC1I | DAC0Q | DAC0I |0| NCH |
+ * +-----------------------------------------------+-------+-+-----+
+ */
+static boost::uint32_t calc_tx_mux(
+    const subdev_spec_t &subdev_spec, wax::obj mboard
+){
+    //create look-up-table for mapping channel number and connection type to flags
+    static const int ENB = 1 << 3, CHAN_I0 = 0, CHAN_Q0 = 1, CHAN_I1 = 2, CHAN_Q1 = 3;
+    static const uhd::dict<size_t, uhd::dict<subdev_conn_t, int> > chan_to_conn_to_flag = boost::assign::map_list_of
+        (0, boost::assign::map_list_of
+            (SUBDEV_CONN_COMPLEX_IQ, calc_tx_mux_pair(CHAN_I0 | ENB, CHAN_Q0 | ENB))
+            (SUBDEV_CONN_COMPLEX_QI, calc_tx_mux_pair(CHAN_Q0 | ENB, CHAN_I0 | ENB))
+            (SUBDEV_CONN_REAL_I,     calc_tx_mux_pair(CHAN_I0 | ENB, 0            ))
+            (SUBDEV_CONN_REAL_Q,     calc_tx_mux_pair(0,             CHAN_I0 | ENB))
+        )
+        (1, boost::assign::map_list_of
+            (SUBDEV_CONN_COMPLEX_IQ, calc_tx_mux_pair(CHAN_I1 | ENB, CHAN_Q1 | ENB))
+            (SUBDEV_CONN_COMPLEX_QI, calc_tx_mux_pair(CHAN_Q1 | ENB, CHAN_I1 | ENB))
+            (SUBDEV_CONN_REAL_I,     calc_tx_mux_pair(CHAN_I1 | ENB, 0            ))
+            (SUBDEV_CONN_REAL_Q,     calc_tx_mux_pair(0,             CHAN_I1 | ENB))
+        )
+    ;
+
+    //extract the number of channels
+    size_t nchan = subdev_spec.size();
+
+    //calculate the channel flags
+    int channel_flags = 0, chan = 0;
+    BOOST_FOREACH(const subdev_spec_pair_t &pair, subdev_spec){
+        wax::obj dboard = mboard[named_prop_t(MBOARD_PROP_TX_DBOARD, pair.db_name)];
+        wax::obj subdev = dboard[named_prop_t(DBOARD_PROP_SUBDEV, pair.sd_name)];
+        subdev_conn_t conn = subdev[SUBDEV_PROP_CONNECTION].as<subdev_conn_t>();
+
+        //combine the channel flags: shift for slot A vs B
+        if (pair.db_name == "A") channel_flags |= chan_to_conn_to_flag[chan][conn] << 0;
+        if (pair.db_name == "B") channel_flags |= chan_to_conn_to_flag[chan][conn] << 8;
+
+        //increment for the next channel
+        chan++;
+    }
+
+    //calculate the tx mux value
+    return ((channel_flags & 0xffff) << 4) | ((nchan & 0x7) << 0);
+}
+
+/*!
+ * Capabilities Register
+ *
+ *    3                   2                   1                   0
+ *  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
+ * +-----------------------------------------------+-+-----+-+-----+
+ * |               Reserved                        |T|DUCs |R|DDCs |
+ * +-----------------------------------------------+-+-----+-+-----+
+ */
+static int num_ddcs(boost::uint32_t regval)
+{
+    return (regval >> 0) & 0x0007;
+}
+
+static int num_ducs(boost::uint32_t regval)
+{
+    return (regval >> 4) & 0x0007;
+}
+
+static bool has_rx_halfband(boost::uint32_t regval)
+{
+    return (regval >> 3) & 0x0001;
+}
+
+static bool has_tx_halfband(boost::uint32_t regval)
+{
+    return (regval >> 7) & 0x0001;
+}
+
+/***********************************************************************
+ * Mboard Initialization
+ **********************************************************************/
+void usrp1_impl::mboard_init(void)
+{
+    _mboard_proxy = wax_obj_proxy::make(
+                     boost::bind(&usrp1_impl::mboard_get, this, _1, _2),
+                     boost::bind(&usrp1_impl::mboard_set, this, _1, _2));
+
+    // Normal mode with no loopback or Rx counting
+    _iface->poke32(FR_MODE, 0x00000000);
+    _iface->poke32(FR_DEBUG_EN, 0x00000000);
+    _iface->poke32(FR_RX_SAMPLE_RATE_DIV, 0x00000001);
+    _iface->poke32(FR_TX_SAMPLE_RATE_DIV, 0x00000003);
+    _iface->poke32(FR_DC_OFFSET_CL_EN, 0x0000000f);
+
+    // Reset offset correction registers
+    _iface->poke32(FR_ADC_OFFSET_0, 0x00000000);
+    _iface->poke32(FR_ADC_OFFSET_1, 0x00000000);
+    _iface->poke32(FR_ADC_OFFSET_2, 0x00000000);
+    _iface->poke32(FR_ADC_OFFSET_3, 0x00000000);
+
+    // Set default for RX format to 16-bit I&Q and no half-band filter bypass
+    _iface->poke32(FR_RX_FORMAT, 0x00000300);
+
+    // Set default for TX format to 16-bit I&Q
+    _iface->poke32(FR_TX_FORMAT, 0x00000000);
+
+    // TODO TODO TODO TODO TODO TODO TODO TODO TODO TODO 
+    // 
+    // Do something useful with the capabilities register
+    //
+    boost::uint32_t regval = _iface->peek32(FR_RB_CAPS);
+    std::cout << "USRP1 Capabilities" << std::endl;
+    std::cout << "    number of duc's: " << num_ddcs(regval) << std::endl;
+    std::cout << "    number of ddc's: " << num_ducs(regval) << std::endl;
+    std::cout << "    rx halfband:     " << has_rx_halfband(regval) << std::endl;
+    std::cout << "    tx halfband:     " << has_tx_halfband(regval) << std::endl;
+}
+
+void usrp1_impl::issue_stream_cmd(const stream_cmd_t &stream_cmd)
+{
+    if (stream_cmd.stream_mode == stream_cmd_t::STREAM_MODE_START_CONTINUOUS) {
+        _iface->write_firmware_cmd(VRQ_FPGA_SET_RX_ENABLE, true, 0, 0, 0);
+    }
+
+    if (stream_cmd.stream_mode == stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS) {
+        _iface->write_firmware_cmd(VRQ_FPGA_SET_RX_ENABLE, false, 0, 0, 0);
+    }
+}
+
+/***********************************************************************
+ * Mboard Get
+ **********************************************************************/
+static prop_names_t dboard_names = boost::assign::list_of("A")("B");
+
+void usrp1_impl::mboard_get(const wax::obj &key_, wax::obj &val)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    if(key_.type() == typeid(std::string)) {
+      if(key.as<std::string>() == "serial") {
+        uhd::byte_vector_t buf;
+        buf.insert(buf.begin(), 248);
+        boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+        _iface->write_i2c(I2C_DEV_EEPROM, buf);
+        boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+        buf = _iface->read_i2c(I2C_DEV_EEPROM, 8);
+        val = std::string(buf.begin(), buf.end());
+      }
+
+      return;
+   	}
+
+    //handle the get request conditioned on the key
+    switch(key.as<mboard_prop_t>()){
+    case MBOARD_PROP_NAME:
+        val = std::string("usrp1 mboard");
+        return;
+
+    case MBOARD_PROP_OTHERS:
+        val = prop_names_t();
+        return;
+
+    case MBOARD_PROP_RX_DBOARD:
+        uhd::assert_has(dboard_names, key.name, "dboard name");
+        if (key.name == "A") val = _rx_dboard_proxies[DBOARD_SLOT_A]->get_link();
+        if (key.name == "B") val = _rx_dboard_proxies[DBOARD_SLOT_B]->get_link();
+        return;
+
+    case MBOARD_PROP_RX_DBOARD_NAMES:
+        val = dboard_names;
+        return;
+
+    case MBOARD_PROP_TX_DBOARD:
+        uhd::assert_has(dboard_names, key.name, "dboard name");
+        if (key.name == "A") val = _tx_dboard_proxies[DBOARD_SLOT_A]->get_link();
+        if (key.name == "B") val = _tx_dboard_proxies[DBOARD_SLOT_B]->get_link();
+        return;
+
+    case MBOARD_PROP_TX_DBOARD_NAMES:
+        val = dboard_names;
+        return;
+
+    case MBOARD_PROP_RX_DSP:
+        UHD_ASSERT_THROW(key.name == "");
+        val = _rx_dsp_proxy->get_link();
+        return;
+
+    case MBOARD_PROP_RX_DSP_NAMES:
+        val = prop_names_t(1, "");
+        return;
+
+    case MBOARD_PROP_TX_DSP:
+        UHD_ASSERT_THROW(key.name == "");
+        val = _tx_dsp_proxy->get_link();
+        return;
+
+    case MBOARD_PROP_TX_DSP_NAMES:
+        val = prop_names_t(1, "");
+        return;
+
+    case MBOARD_PROP_CLOCK_CONFIG:
+        val = _clock_config;
+        return;
+
+    case MBOARD_PROP_RX_SUBDEV_SPEC:
+        val = _rx_subdev_spec;
+        return;
+
+    case MBOARD_PROP_TX_SUBDEV_SPEC:
+        val = _tx_subdev_spec;
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * Mboard Set
+ **********************************************************************/
+void usrp1_impl::mboard_set(const wax::obj &key, const wax::obj &val)
+{
+    if(key.type() == typeid(std::string)) {
+      if(key.as<std::string>() == "load_eeprom") {
+        std::string usrp1_eeprom_image = val.as<std::string>();
+        std::cout << "USRP1 EEPROM image: " << usrp1_eeprom_image << std::endl;
+        _ctrl_transport->usrp_load_eeprom(val.as<std::string>());
+      }
+
+      if(key.as<std::string>() == "serial") {
+        std::string sernum = val.as<std::string>();
+        uhd::byte_vector_t buf(sernum.begin(), sernum.end());
+        buf.insert(buf.begin(), 248);
+        _iface->write_i2c(I2C_DEV_EEPROM, buf);
+      }
+
+      return;
+   	}
+
+    //handle the get request conditioned on the key
+    switch(key.as<mboard_prop_t>()){
+
+    case MBOARD_PROP_STREAM_CMD:
+        issue_stream_cmd(val.as<stream_cmd_t>());
+        return;
+
+    case MBOARD_PROP_RX_SUBDEV_SPEC:
+        _rx_subdev_spec = val.as<subdev_spec_t>();
+        verify_rx_subdev_spec(_rx_subdev_spec, _mboard_proxy->get_link());
+        //sanity check
+        UHD_ASSERT_THROW(_rx_subdev_spec.size() <= 2);
+        //set the mux and set the number of rx channels
+        _iface->poke32(FR_RX_MUX, calc_rx_mux(_rx_subdev_spec, _mboard_proxy->get_link()));
+        return;
+
+    case MBOARD_PROP_TX_SUBDEV_SPEC:
+        _tx_subdev_spec = val.as<subdev_spec_t>();
+        verify_tx_subdev_spec(_tx_subdev_spec, _mboard_proxy->get_link());
+        //sanity check
+        UHD_ASSERT_THROW(_tx_subdev_spec.size() <= 2);
+        //set the mux and set the number of tx channels
+        _iface->poke32(FR_TX_MUX, calc_tx_mux(_tx_subdev_spec, _mboard_proxy->get_link()));
+        return;
+
+    default: UHD_THROW_PROP_SET_ERROR();
+    }
+}
diff --git a/host/lib/usrp/usrp1/usrp1_ctrl.cpp b/host/lib/usrp/usrp1/usrp1_ctrl.cpp
new file mode 100644
index 000000000..451129ef5
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_ctrl.cpp
@@ -0,0 +1,446 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_ctrl.hpp"
+#include "usrp_commands.h" 
+#include <uhd/transport/usb_control.hpp>
+#include <boost/functional/hash.hpp>
+#include <boost/thread/thread.hpp>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <vector>
+#include <cstring>
+
+using namespace uhd;
+
+enum firmware_code {
+    USRP_FPGA_LOAD_SUCCESS,
+    USRP_FPGA_ALREADY_LOADED,
+    USRP_FIRMWARE_LOAD_SUCCESS,
+    USRP_FIRMWARE_ALREADY_LOADED
+};
+
+#define FX2_FIRMWARE_LOAD 0xa0
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+/*!
+ * Create a file hash
+ * The hash will be used to identify the loaded firmware and fpga image 
+ * \param filename file used to generate hash value
+ * \return hash value in a size_t type
+ */
+static size_t generate_hash(const char *filename)
+{
+    std::ifstream file(filename);
+    if (!file)
+        std::cerr << "error: cannot open input file " << filename << std::endl;
+
+    size_t hash = 0;
+
+    char ch;
+    while (file.get(ch)) {
+        boost::hash_combine(hash, ch);
+    }
+
+    if (!file.eof())
+        std::cerr << "error: file error " << filename << std::endl;
+
+    file.close(); 
+    return hash; 
+}
+
+
+/*!
+ * Verify checksum of a Intel HEX record 
+ * \param record a line from an Intel HEX file
+ * \return true if record is valid, false otherwise 
+ */
+static bool checksum(std::string *record)
+{
+
+    size_t len = record->length();
+    unsigned int i;
+    unsigned char sum = 0;
+    unsigned int val;
+
+    for (i = 1; i < len; i += 2) {
+        std::istringstream(record->substr(i, 2)) >> std::hex >> val;
+        sum += val;
+    }
+
+    if (sum == 0)
+       return true;
+    else
+       return false;
+}
+
+
+/*!
+ * Parse Intel HEX record
+ *
+ * \param record a line from an Intel HEX file
+ * \param len output length of record
+ * \param addr output address
+ * \param type output type
+ * \param data output data
+ * \return true if record is sucessfully read, false on error
+ */
+bool parse_record(std::string *record, unsigned int &len,
+                  unsigned int &addr, unsigned int &type,
+                  unsigned char* data)
+{
+    unsigned int i;
+    std::string _data;
+    unsigned int val;
+
+    if (record->substr(0, 1) != ":")
+        return false;
+
+    std::istringstream(record->substr(1, 2)) >> std::hex >> len;
+    std::istringstream(record->substr(3, 4)) >> std::hex >> addr;
+    std::istringstream(record->substr(7, 2)) >> std::hex >> type;
+
+    for (i = 0; i < len; i++) {
+        std::istringstream(record->substr(9 + 2 * i, 2)) >> std::hex >> val;
+        data[i] = (unsigned char) val;
+    } 
+
+    return true;
+}
+
+
+/*!
+ * USRP control implementation for device discovery and configuration
+ */
+class usrp_ctrl_impl : public usrp_ctrl {
+public:
+    usrp_ctrl_impl(uhd::transport::usb_control::sptr ctrl_transport)
+    {
+        _ctrl_transport = ctrl_transport;
+    }
+
+
+    ~usrp_ctrl_impl(void)
+    {
+        /* NOP */
+    }
+
+
+    int usrp_load_firmware(std::string filestring, bool force)
+    {
+        const char *filename = filestring.c_str();
+
+        size_t hash = generate_hash(filename);
+
+        size_t loaded_hash;
+        if (usrp_get_firmware_hash(loaded_hash) < 0) {
+            std::cerr << "firmware hash retrieval failed" << std::endl;
+            return -1;
+        }
+
+        if (!force && (hash == loaded_hash))
+            return USRP_FIRMWARE_ALREADY_LOADED;
+
+        //FIXME: verify types
+        unsigned int len;
+        unsigned int addr;
+        unsigned int type;
+        unsigned char data[512];
+
+        int ret;
+        std::ifstream file;
+        file.open(filename, std::ifstream::in);
+
+        if (!file.good()) {
+            std::cerr << "cannot open firmware input file" << std::endl;
+            return -1; 
+        }
+
+        unsigned char reset_y = 1;
+        unsigned char reset_n = 0;
+
+        //hit the reset line
+        usrp_control_write(FX2_FIRMWARE_LOAD, 0xe600, 0,
+                           &reset_y, 1);
+ 
+        while (!file.eof()) {
+           std::string record;
+           file >> record;
+      
+            //check for valid record 
+            if (!checksum(&record) || 
+                    !parse_record(&record, len, addr, type, data)) {
+                std::cerr << "error: bad record" << std::endl;
+                file.close();
+                return -1;
+            }
+
+            //type 0x00 is data
+            if (type == 0x00) {
+               ret = usrp_control_write(FX2_FIRMWARE_LOAD, addr, 0,
+                                        data, len);
+               if (ret < 0) {
+                    std::cerr << "error: usrp_control_write failed: ";
+                    std::cerr << ret << std::endl;
+                    file.close();
+                    return -1; 
+                }
+            }  
+            //type 0x01 is end 
+            else if (type == 0x01) {
+                usrp_control_write(FX2_FIRMWARE_LOAD, 0xe600, 0,
+                                   &reset_n, 1);
+                usrp_set_firmware_hash(hash);
+                file.close();
+
+                //wait for things to settle
+                boost::this_thread::sleep(boost::posix_time::milliseconds(1000));
+
+                return USRP_FIRMWARE_LOAD_SUCCESS; 
+            }
+            //type anything else is unhandled
+            else {
+                std::cerr << "error: unsupported record" << std::endl;
+                file.close();
+                return -1; 
+            }
+        }
+
+        //file did not end 
+        std::cerr << "error: bad record" << std::endl;
+        file.close();
+        return -1;
+    }
+
+
+    int usrp_load_fpga(std::string filestring)
+    {
+        const char *filename = filestring.c_str();
+
+        size_t hash = generate_hash(filename);
+
+        size_t loaded_hash;
+        if (usrp_get_fpga_hash(loaded_hash) < 0) {
+            std::cerr << "fpga hash retrieval failed" << std::endl;
+            return -1;
+        }
+
+        if (hash == loaded_hash)
+            return USRP_FPGA_ALREADY_LOADED;
+        const int ep0_size = 64;
+        unsigned char buf[ep0_size];
+        int ret;
+
+        FILE *fp;
+        if ((fp = fopen(filename, "rb")) == NULL) {
+            std::cerr << "cannot open fpga input file" << std::endl;
+            fclose(fp);
+            return -1;
+        }
+
+        if (usrp_control_write_cmd(VRQ_FPGA_LOAD, 0, FL_BEGIN) < 0) {
+            std::cerr << "fpga load error" << std::endl;
+            fclose(fp);
+            return -1;
+        }
+
+        ssize_t n;
+        while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
+            ret = usrp_control_write(VRQ_FPGA_LOAD, 0, FL_XFER,
+                                     buf, n);
+            if (ret != n) {
+                std::cerr << "fpga load error " << ret << std::endl;
+                fclose(fp);
+                return -1;
+            }
+        }
+ 
+        if (usrp_control_write_cmd(VRQ_FPGA_LOAD, 0, FL_END) < 0) {
+            std::cerr << "fpga load error" << std::endl;
+            fclose(fp);
+            return -1;
+        }
+
+        usrp_set_fpga_hash(hash);
+        fclose(fp);
+        return 0; 
+    }
+
+    int usrp_load_eeprom(std::string filestring)
+    {
+        const char *filename = filestring.c_str();
+        const uint16_t i2c_addr = 0x50;
+
+        //FIXME: verify types
+        int len;
+        unsigned int addr;
+        unsigned char data[256];
+        unsigned char sendbuf[17];
+
+        int ret;
+        std::ifstream file;
+        file.open(filename, std::ifstream::in);
+
+        if (!file.good()) {
+            std::cerr << "cannot open EEPROM input file" << std::endl;
+            return -1; 
+        }
+
+        file.read((char *)data, 256);
+        len = file.gcount();
+
+        if(len == 256) {
+          std::cerr << "error: image size too large" << std::endl;
+          file.close();
+          return -1;
+        }
+
+        const int pagesize = 16;
+        addr = 0;
+        while(len > 0) {
+          sendbuf[0] = addr;
+          memcpy(sendbuf+1, &data[addr], len > pagesize ? pagesize : len);
+          ret = usrp_i2c_write(i2c_addr, sendbuf, (len > pagesize ? pagesize : len)+1);
+          if (ret < 0) {
+            std::cerr << "error: usrp_i2c_write failed: ";
+            std::cerr << ret << std::endl;
+            file.close();
+            return -1; 
+          }
+          addr += pagesize;
+          len -= pagesize;
+          boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+        }
+        file.close();
+        return 0;
+    }
+
+
+    int usrp_set_led(int led_num, bool on)
+    {
+        return usrp_control_write_cmd(VRQ_SET_LED, on, led_num);
+    }
+
+
+    int usrp_get_firmware_hash(size_t &hash)
+    {
+        return usrp_control_read(0xa0, USRP_HASH_SLOT_0_ADDR, 0, 
+                                 (unsigned char*) &hash, sizeof(size_t));
+    }
+
+
+    int usrp_set_firmware_hash(size_t hash)
+    {
+        return usrp_control_write(0xa0, USRP_HASH_SLOT_0_ADDR, 0,
+                                  (unsigned char*) &hash, sizeof(size_t));
+
+    }
+
+
+    int usrp_get_fpga_hash(size_t &hash)
+    {
+        return usrp_control_read(0xa0, USRP_HASH_SLOT_1_ADDR, 0,
+                                 (unsigned char*) &hash, sizeof(size_t));
+    }
+
+
+    int usrp_set_fpga_hash(size_t hash)
+    {
+        return usrp_control_write(0xa0, USRP_HASH_SLOT_1_ADDR, 0,
+                                  (unsigned char*) &hash, sizeof(size_t));
+    }
+
+    int usrp_tx_enable(bool on)
+    {
+        return usrp_control_write_cmd(VRQ_FPGA_SET_TX_ENABLE, on, 0);
+    }
+
+
+    int usrp_rx_enable(bool on)
+    {
+        return usrp_control_write_cmd(VRQ_FPGA_SET_RX_ENABLE, on, 0); 
+    }
+
+
+    int usrp_tx_reset(bool on)
+    {
+        return usrp_control_write_cmd(VRQ_FPGA_SET_TX_RESET, on, 0); 
+    }
+
+
+    int usrp_control_write(boost::uint8_t request,
+                           boost::uint16_t value,
+                           boost::uint16_t index,
+                           unsigned char *buff,
+                           boost::uint16_t length)
+    {
+        return _ctrl_transport->submit(VRT_VENDOR_OUT,     // bmReqeustType
+                                       request,            // bRequest
+                                       value,              // wValue
+                                       index,              // wIndex
+                                       buff,               // data
+                                       length);            // wLength 
+    }
+
+
+    int usrp_control_read(boost::uint8_t request,
+                          boost::uint16_t value,
+                          boost::uint16_t index,
+                          unsigned char *buff,
+                          boost::uint16_t length)
+    {
+        return _ctrl_transport->submit(VRT_VENDOR_IN,      // bmReqeustType
+                                       request,            // bRequest
+                                       value,              // wValue
+                                       index,              // wIndex
+                                       buff,               // data
+                                       length);            // wLength
+    }
+
+
+    int usrp_control_write_cmd(uint8_t request, uint16_t value, uint16_t index)
+    {
+        return usrp_control_write(request, value, index, 0, 0);
+    }
+
+    int usrp_i2c_write(boost::uint16_t i2c_addr, unsigned char *buf, boost::uint16_t len)
+    {
+        return usrp_control_write(VRQ_I2C_WRITE, i2c_addr, 0, buf, len);
+    }
+
+    int usrp_i2c_read(boost::uint16_t i2c_addr, unsigned char *buf, boost::uint16_t len)
+    {
+        return usrp_control_read(VRQ_I2C_READ, i2c_addr, 0, buf, len);
+    }
+
+
+
+private:
+    uhd::transport::usb_control::sptr _ctrl_transport;
+};
+
+/***********************************************************************
+ * Public make function for usrp_ctrl interface
+ **********************************************************************/
+usrp_ctrl::sptr usrp_ctrl::make(uhd::transport::usb_control::sptr ctrl_transport){
+    return sptr(new usrp_ctrl_impl(ctrl_transport));
+}
+
diff --git a/host/lib/usrp/usrp1/usrp1_ctrl.hpp b/host/lib/usrp/usrp1/usrp1_ctrl.hpp
new file mode 100644
index 000000000..a02d9f96c
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_ctrl.hpp
@@ -0,0 +1,163 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRP_CTRL_HPP
+#define INCLUDED_USRP_CTRL_HPP
+
+#include <uhd/transport/usb_control.hpp> 
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+
+class usrp_ctrl : boost::noncopyable{
+public:
+    typedef boost::shared_ptr<usrp_ctrl> sptr;
+
+    /*!
+     * Make a usrp control object from a control transport
+     * \param ctrl_transport a USB control transport
+     * \return a new usrp control object
+     */
+    static sptr make(uhd::transport::usb_control::sptr ctrl_transport);
+
+    /*!
+     * Load firmware in Intel HEX Format onto device 
+     * \param filename name of firmware file
+     * \param force reload firmware if already loaded
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_load_firmware(std::string filename,
+                                   bool force = false) = 0;
+
+    /*!
+     * Load fpga file onto usrp 
+     * \param filename name of fpga image 
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_load_fpga(std::string filename) = 0;
+
+    /*!
+     * Load USB descriptor file in Intel HEX format into EEPROM
+     * \param filename name of EEPROM image 
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_load_eeprom(std::string filestring) = 0;
+
+    /*!
+     * Set led usrp 
+     * \param led_num which LED to control (0 or 1)
+     * \param on turn LED on or off
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_set_led(int led_num, bool on) = 0;
+
+    /*!
+     * Get firmware hash 
+     * \param hash a size_t hash value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_get_firmware_hash(size_t &hash) = 0;
+
+    /*!
+     * Set firmware hash 
+     * \param hash a size_t hash value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_set_firmware_hash(size_t hash) = 0;
+                              
+    /*!
+     * Get fpga hash 
+     * \param hash a size_t hash value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_get_fpga_hash(size_t &hash) = 0;
+
+    /*!
+     * Set fpga hash 
+     * \param hash a size_t hash value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_set_fpga_hash(size_t hash) = 0;
+
+    /*!
+     * Set rx enable or disable 
+     * \param on enable or disable value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_rx_enable(bool on) = 0;
+
+    /*!
+     * Set rx enable or disable 
+     * \param on enable or disable value
+     * \return 0 on success, error code otherwise
+     */
+    virtual int usrp_tx_enable(bool on) = 0;
+
+    /*!
+     * Submit an IN transfer 
+     * \param request device specific request 
+     * \param value device specific field
+     * \param index device specific field
+     * \param buff buffer to place data
+     * \return number of bytes read or error 
+     */
+    virtual int usrp_control_read(boost::uint8_t request,
+                                  boost::uint16_t value,
+                                  boost::uint16_t index,
+                                  unsigned char *buff,
+                                  boost::uint16_t length) = 0;
+
+    /*!
+     * Submit an OUT transfer 
+     * \param request device specific request 
+     * \param value device specific field
+     * \param index device specific field
+     * \param buff buffer of data to be sent 
+     * \return number of bytes written or error 
+     */
+    virtual int usrp_control_write(boost::uint8_t request,
+                                   boost::uint16_t value,
+                                   boost::uint16_t index,
+                                   unsigned char *buff,
+                                   boost::uint16_t length) = 0;
+
+    /*!
+     * Perform an I2C write
+     * \param i2c_addr I2C device address
+     * \param buf data to be written 
+     * \param len length of data in bytes
+     * \return number of bytes written or error 
+     */
+
+    virtual int usrp_i2c_write(boost::uint16_t i2c_addr,
+                               unsigned char *buf, 
+                               boost::uint16_t len) = 0;
+
+    /*!
+     * Perform an I2C read
+     * \param i2c_addr I2C device address
+     * \param buf data to be read 
+     * \param len length of data in bytes
+     * \return number of bytes read or error 
+     */
+
+    virtual int usrp_i2c_read(boost::uint16_t i2c_addr,
+                               unsigned char *buf, 
+                               boost::uint16_t len) = 0;
+
+};
+
+#endif /* INCLUDED_USRP_CTRL_HPP */
diff --git a/host/lib/usrp/usrp1/usrp1_iface.cpp b/host/lib/usrp/usrp1/usrp1_iface.cpp
new file mode 100644
index 000000000..4bc18dd16
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_iface.cpp
@@ -0,0 +1,261 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_iface.hpp"
+#include "usrp_commands.h"
+#include <uhd/utils/assert.hpp>
+#include <uhd/utils/byteswap.hpp>
+#include <boost/format.hpp>
+#include <stdexcept>
+#include <iostream>
+#include <iomanip>
+
+using namespace uhd;
+using namespace uhd::transport;
+
+static const bool iface_debug = false;
+
+class usrp1_iface_impl : public usrp1_iface{
+public:
+    /*******************************************************************
+     * Structors
+     ******************************************************************/
+    usrp1_iface_impl(usrp_ctrl::sptr ctrl_transport)
+    {
+        _ctrl_transport = ctrl_transport; 
+    }
+
+    ~usrp1_iface_impl(void)
+    {
+        /* NOP */
+    }
+
+    /*******************************************************************
+     * Peek and Poke
+     ******************************************************************/
+    void poke32(boost::uint32_t addr, boost::uint32_t value)
+    {
+        boost::uint32_t swapped = byteswap(value);
+
+        if (iface_debug) {
+            std::cout.fill('0');
+            std::cout << "poke32(";
+            std::cout << std::dec << std::setw(2) << addr << ", 0x";
+            std::cout << std::hex << std::setw(8) << value << ")" << std::endl;
+        }
+
+        boost::uint8_t w_index_h = SPI_ENABLE_FPGA & 0xff;
+        boost::uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_1) & 0xff;
+
+        int ret =_ctrl_transport->usrp_control_write(
+                                          VRQ_SPI_WRITE,
+                                          addr & 0x7f,
+                                          (w_index_h << 8) | (w_index_l << 0),
+                                          (unsigned char*) &swapped,
+                                          sizeof(boost::uint32_t));
+
+        if (ret < 0)
+            std::cerr << "USRP: failed memory write: " << ret << std::endl;
+    }
+
+    void poke16(boost::uint32_t, boost::uint16_t)
+    {
+        //fpga only handles 32 bit writes
+        std::cerr << "USRP: unsupported operation: poke16()" << std::endl;
+    }
+
+    boost::uint32_t peek32(boost::uint32_t addr)
+    {
+        uint32_t value_out;
+
+        boost::uint8_t w_index_h = SPI_ENABLE_FPGA & 0xff;
+        boost::uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_1) & 0xff;
+
+        int ret = _ctrl_transport->usrp_control_read(
+                                          VRQ_SPI_READ,
+                                          0x80 | (addr & 0x7f),
+                                          (w_index_h << 8) | (w_index_l << 0),
+                                          (unsigned char*) &value_out,
+                                          sizeof(boost::uint32_t));
+
+        if (ret < 0)
+            std::cerr << "USRP: failed memory read: " << ret << std::endl;
+
+        return byteswap(value_out);
+    }
+
+    boost::uint16_t peek16(boost::uint32_t addr)
+    {
+        uint32_t val = peek32(addr);
+        return boost::uint16_t(val & 0xff);
+    }
+
+    /*******************************************************************
+     * I2C
+     ******************************************************************/
+    static const size_t max_i2c_data_bytes = 64;
+
+    //TODO: make this handle EEPROM page sizes. right now you can't write over a 16-byte boundary.
+    //to accomplish this you'll have to have addr offset as a separate parameter.
+
+    void write_i2c(boost::uint8_t addr, const byte_vector_t &bytes)
+    {
+        UHD_ASSERT_THROW(bytes.size() < max_i2c_data_bytes);
+
+        unsigned char buff[max_i2c_data_bytes];
+        std::copy(bytes.begin(), bytes.end(), buff);
+
+        int ret = _ctrl_transport->usrp_i2c_write(addr & 0xff,
+                                             buff,
+                                             bytes.size());
+
+        // TODO throw and catch i2c failures during eeprom read
+        if (iface_debug && (ret < 0))
+            std::cerr << "USRP: failed i2c write: " << ret << std::endl;
+    }
+
+    byte_vector_t read_i2c(boost::uint8_t addr, size_t num_bytes)
+    {
+        UHD_ASSERT_THROW(num_bytes < max_i2c_data_bytes);
+
+        unsigned char buff[max_i2c_data_bytes];
+        int ret = _ctrl_transport->usrp_i2c_read(addr & 0xff,
+                                            buff,
+                                            num_bytes);
+
+        // TODO throw and catch i2c failures during eeprom read
+        if (iface_debug && ((ret < 0) || (unsigned)ret < (num_bytes))) {
+            std::cerr << "USRP: failed i2c read: " << ret << std::endl;
+            return byte_vector_t(num_bytes, 0xff); 
+        }
+
+        byte_vector_t out_bytes;
+        for (size_t i = 0; i < num_bytes; i++)
+            out_bytes.push_back(buff[i]);
+
+        return out_bytes; 
+    }
+
+    /*******************************************************************
+     * SPI
+     *
+     * For non-readback transactions use the SPI_WRITE command, which is
+     * simpler and uses the USB control buffer for OUT data. No data
+     * needs to be returned.
+     *
+     * For readback transactions use SPI_TRANSACT, which places up to
+     * 4 bytes of OUT data in the device request fields and uses the
+     * control buffer for IN data.
+     ******************************************************************/
+    boost::uint32_t transact_spi(int which_slave,
+                                 const spi_config_t &,
+                                 boost::uint32_t bits,
+                                 size_t num_bits,
+                                 bool readback)
+    {
+        UHD_ASSERT_THROW((num_bits <= 32) && !(num_bits % 8));
+        size_t num_bytes = num_bits / 8;
+
+        // Byteswap on num_bytes
+        unsigned char buff[4] = { 0 };
+        for (size_t i = 1; i <= num_bytes; i++)
+            buff[num_bytes - i] = (bits >> ((i - 1) * 8)) & 0xff;
+
+        if (readback) {
+            boost::uint8_t w_len_h = which_slave & 0xff;
+            boost::uint8_t w_len_l = num_bytes & 0xff;
+
+            int ret = _ctrl_transport->usrp_control_read(
+                                         VRQ_SPI_TRANSACT,
+                                         (buff[0] << 8) | (buff[1] << 0), 
+                                         (buff[2] << 8) | (buff[3] << 0),
+                                         buff,
+                                         (w_len_h << 8) | (w_len_l << 0));
+
+            if (ret < 0) {
+                std::cout << "USRP: failed SPI readback transaction: "
+                          << std::dec << ret << std::endl;
+            }
+
+            boost::uint32_t val = (((boost::uint32_t)buff[0]) <<  0) |
+                                  (((boost::uint32_t)buff[1]) <<  8) |
+                                  (((boost::uint32_t)buff[2]) << 16) |
+                                  (((boost::uint32_t)buff[3]) << 24);
+            return val; 
+        }
+        else {
+            boost::uint8_t w_index_h = which_slave & 0xff;
+            boost::uint8_t w_index_l = (SPI_FMT_MSB | SPI_FMT_HDR_0) & 0xff;
+
+            int ret =_ctrl_transport->usrp_control_write(
+                                          VRQ_SPI_WRITE,
+                                          0x00,
+                                          (w_index_h << 8) | (w_index_l << 0),
+                                          buff, num_bytes);
+
+            if (ret < 0) {
+                std::cout << "USRP: failed SPI transaction: "
+                          << std::dec << ret << std::endl;
+            }
+
+            return 0;
+        }
+    }
+
+    /*******************************************************************
+     * Firmware 
+     *
+     * This call is deprecated.
+     ******************************************************************/
+    void write_firmware_cmd(boost::uint8_t request,
+                            boost::uint16_t value,
+                            boost::uint16_t index,
+                            unsigned char *buff,
+                            boost::uint16_t length)
+    {
+        int ret;
+
+        if (request & 0x80) {
+            ret = _ctrl_transport->usrp_control_read(request,
+                                                     value,
+                                                     index,
+                                                     buff,
+                                                     length);
+        }
+        else {
+            ret = _ctrl_transport->usrp_control_write(request,
+                                                      value,
+                                                      index,
+                                                      buff,
+                                                      length);
+        }
+
+        if (ret < 0)
+            std::cerr << "USRP: failed firmware command: " << ret << std::endl;
+    }
+
+private:
+    usrp_ctrl::sptr _ctrl_transport;
+};
+
+/***********************************************************************
+ * Public Make Function
+ **********************************************************************/
+usrp1_iface::sptr usrp1_iface::make(usrp_ctrl::sptr ctrl_transport)
+{
+    return sptr(new usrp1_iface_impl(ctrl_transport));
+}
diff --git a/host/lib/usrp/usrp1/usrp1_iface.hpp b/host/lib/usrp/usrp1/usrp1_iface.hpp
new file mode 100644
index 000000000..9a3fdd6bc
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_iface.hpp
@@ -0,0 +1,100 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRP1_IFACE_HPP
+#define INCLUDED_USRP1_IFACE_HPP
+
+#include <uhd/types/serial.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+#include "usrp1_ctrl.hpp"
+
+/*!
+ * The usrp1 interface class:
+ * Provides a set of functions to implementation layer.
+ * Including spi, peek, poke, control...
+ */
+class usrp1_iface : boost::noncopyable, public uhd::i2c_iface{
+public:
+    typedef boost::shared_ptr<usrp1_iface> sptr;
+
+    /*!
+     * Make a new usrp1 interface with the control transport.
+     * \param ctrl_transport the usrp controller object
+     * \return a new usrp1 interface object
+     */
+    static sptr make(usrp_ctrl::sptr ctrl_transport);
+
+    /*!
+     * Write a register (32 bits)
+     * \param addr the address
+     * \param data the 32bit data
+     */
+    virtual void poke32(boost::uint32_t addr, boost::uint32_t data) = 0;
+
+    /*!
+     * Read a register (32 bits)
+     * \param addr the address
+     * \return the 32bit data
+     */
+    virtual boost::uint32_t peek32(boost::uint32_t addr) = 0;
+
+    /*!
+     * Write a register (16 bits)
+     * \param addr the address
+     * \param data the 16bit data
+     */
+    virtual void poke16(boost::uint32_t addr, boost::uint16_t data) = 0;
+
+    /*!
+     * read a register (16 bits)
+     * \param addr the address
+     * \return the 16bit data
+     */
+    virtual boost::uint16_t peek16(boost::uint32_t addr) = 0;
+
+    /*!
+     * Perform an spi transaction.
+     * \param which_slave the slave device number
+     * \param config spi config args
+     * \param data the bits to write
+     * \param num_bits how many bits in data
+     * \param readback true to readback a value
+     * \return spi data if readback set
+     */
+    virtual boost::uint32_t transact_spi(int which_slave,
+                                         const uhd::spi_config_t &config,
+                                         boost::uint32_t data,
+                                         size_t num_bits,
+                                         bool readback) = 0;
+
+    /*!
+     * Perform a general USB firmware OUT operation
+     * \param request 
+     * \param value
+     * \param index 
+     * \param data 
+     * \return 
+     */
+    virtual void write_firmware_cmd(boost::uint8_t request,
+                                   boost::uint16_t value,
+                                   boost::uint16_t index,
+                                   unsigned char* buff,
+                                   boost::uint16_t length) = 0;
+};
+
+#endif /* INCLUDED_USRP1_IFACE_HPP */
diff --git a/host/lib/usrp/usrp1/usrp1_impl.cpp b/host/lib/usrp/usrp1/usrp1_impl.cpp
new file mode 100644
index 000000000..a6806dbc3
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_impl.cpp
@@ -0,0 +1,236 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_impl.hpp"
+#include "usrp1_ctrl.hpp"
+#include "fpga_regs_standard.h"
+#include "usrp_spi_defs.h"
+#include <uhd/transport/usb_control.hpp>
+#include <uhd/usrp/device_props.hpp>
+#include <uhd/usrp/mboard_props.hpp>
+#include <uhd/utils/warning.hpp>
+#include <uhd/utils/assert.hpp>
+#include <uhd/utils/static.hpp>
+#include <uhd/utils/images.hpp>
+#include <boost/format.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/thread/thread.hpp>
+#include <iostream>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+
+const boost::uint16_t USRP1_VENDOR_ID  = 0xfffe;
+const boost::uint16_t USRP1_PRODUCT_ID = 0x0002;
+const boost::uint16_t FX2_VENDOR_ID    = 0x04b4;
+const boost::uint16_t FX2_PRODUCT_ID   = 0x8613;
+
+const std::vector<usrp1_impl::dboard_slot_t> usrp1_impl::_dboard_slots = boost::assign::list_of
+    (usrp1_impl::DBOARD_SLOT_A)(usrp1_impl::DBOARD_SLOT_B)
+;
+
+/***********************************************************************
+ * Discovery
+ **********************************************************************/
+static device_addrs_t usrp1_find(const device_addr_t &hint)
+{
+    device_addrs_t usrp1_addrs;
+
+    //return an empty list of addresses when type is set to non-usrp1
+    if (hint.has_key("type") and hint["type"] != "usrp1") return usrp1_addrs;
+
+    //extract the firmware path for the USRP1
+    std::string usrp1_fw_image;
+    try{
+        usrp1_fw_image = find_image_path(
+            hint.has_key("fw")? hint["fw"] : "usrp1_fw.ihx"
+        );
+    }
+    catch(const std::exception &e){
+        uhd::print_warning(
+            "Could not locate USRP1 firmware.\n"
+            "Please install the images package.\n"
+        );
+        return usrp1_addrs;
+    }
+    //std::cout << "USRP1 firmware image: " << usrp1_fw_image << std::endl;
+
+    boost::uint16_t vid = hint.has_key("uninit") ? FX2_VENDOR_ID : USRP1_VENDOR_ID;
+    boost::uint16_t pid = hint.has_key("uninit") ? FX2_PRODUCT_ID : USRP1_PRODUCT_ID;
+
+    //see what we got on the USB bus
+    std::vector<usb_device_handle::sptr> device_list =
+        usb_device_handle::get_device_list(vid, pid);
+
+    if(device_list.size() == 0) return usrp1_addrs; //return nothing if no USRPs found
+
+    //find the usrps and load firmware
+    BOOST_FOREACH(usb_device_handle::sptr handle, device_list) {
+            usb_control::sptr ctrl_transport = usb_control::make(handle);
+            usrp_ctrl::sptr usrp_ctrl = usrp_ctrl::make(ctrl_transport);
+            usrp_ctrl->usrp_load_firmware(usrp1_fw_image);
+    }
+
+    //get descriptors again with serial number, but using the initialized VID/PID now since we have firmware
+    vid = USRP1_VENDOR_ID;
+    pid = USRP1_PRODUCT_ID;
+    device_list = usb_device_handle::get_device_list(vid, pid);
+
+    BOOST_FOREACH(usb_device_handle::sptr handle, device_list) {
+            device_addr_t new_addr;
+            new_addr["type"] = "usrp1";
+            new_addr["serial"] = handle->get_serial();
+            usrp1_addrs.push_back(new_addr);
+    }
+
+    return usrp1_addrs;
+}
+
+/***********************************************************************
+ * Make
+ **********************************************************************/
+static device::sptr usrp1_make(const device_addr_t &device_addr)
+{
+    //extract the FPGA path for the USRP1
+    std::string usrp1_fpga_image = find_image_path(
+        device_addr.has_key("fpga")? device_addr["fpga"] : "usrp1_fpga.rbf"
+    );
+    //std::cout << "USRP1 FPGA image: " << usrp1_fpga_image << std::endl;
+
+    //try to match the given device address with something on the USB bus
+    std::vector<usb_device_handle::sptr> device_list =
+        usb_device_handle::get_device_list(USRP1_VENDOR_ID, USRP1_PRODUCT_ID);
+
+    //create data and control transports
+    usb_zero_copy::sptr data_transport;
+    usrp_ctrl::sptr usrp_ctrl;
+
+
+    BOOST_FOREACH(usb_device_handle::sptr handle, device_list) {
+        if (handle->get_serial() == device_addr["serial"]) {
+            usb_control::sptr ctrl_transport = usb_control::make(handle);
+            usrp_ctrl = usrp_ctrl::make(ctrl_transport);
+            usrp_ctrl->usrp_load_fpga(usrp1_fpga_image);
+
+            data_transport = usb_zero_copy::make(handle,        // identifier
+                                                 6,             // IN endpoint
+                                                 2,             // OUT endpoint
+                                                 2 * (1 << 20), // buffer size
+                                                 16384);        // transfer size
+            break;
+        }
+    }
+
+    //create the usrp1 implementation guts
+    return device::sptr(new usrp1_impl(data_transport, usrp_ctrl));
+}
+
+UHD_STATIC_BLOCK(register_usrp1_device){
+    device::register_device(&usrp1_find, &usrp1_make);
+}
+
+/***********************************************************************
+ * Structors
+ **********************************************************************/
+usrp1_impl::usrp1_impl(uhd::transport::usb_zero_copy::sptr data_transport,
+                       usrp_ctrl::sptr ctrl_transport)
+ : _data_transport(data_transport), _ctrl_transport(ctrl_transport)
+{
+    _iface = usrp1_iface::make(ctrl_transport);
+
+    //create clock interface
+    _clock_ctrl = usrp1_clock_ctrl::make(_iface);
+
+    //create codec interface
+    _codec_ctrls[DBOARD_SLOT_A] = usrp1_codec_ctrl::make(
+        _iface, _clock_ctrl, SPI_ENABLE_CODEC_A
+    );
+    _codec_ctrls[DBOARD_SLOT_B] = usrp1_codec_ctrl::make(
+        _iface, _clock_ctrl, SPI_ENABLE_CODEC_B
+    );
+
+    //initialize the codecs
+    codec_init();
+
+    //initialize the mboard
+    mboard_init();
+
+    //initialize the dboards 
+    dboard_init();
+
+    //initialize the dsps
+    rx_dsp_init();
+
+    //initialize the dsps
+    tx_dsp_init();
+
+    //initialize the send/recv
+    io_init();
+
+    //turn on the transmitter
+    _ctrl_transport->usrp_tx_enable(true);
+
+    //init the subdev specs
+    this->mboard_set(MBOARD_PROP_RX_SUBDEV_SPEC, subdev_spec_t());
+    this->mboard_set(MBOARD_PROP_TX_SUBDEV_SPEC, subdev_spec_t());
+}
+
+usrp1_impl::~usrp1_impl(void){
+    /* NOP */
+}
+
+bool usrp1_impl::recv_async_msg(uhd::async_metadata_t &, size_t timeout_ms){
+    //dummy fill-in for the recv_async_msg
+    boost::this_thread::sleep(boost::posix_time::milliseconds(timeout_ms));
+    return false;
+}
+
+/***********************************************************************
+ * Device Get
+ **********************************************************************/
+void usrp1_impl::get(const wax::obj &key_, wax::obj &val)
+{
+    named_prop_t key = named_prop_t::extract(key_);
+
+    //handle the get request conditioned on the key
+    switch(key.as<device_prop_t>()){
+    case DEVICE_PROP_NAME:
+        val = std::string("usrp1 device");
+        return;
+
+    case DEVICE_PROP_MBOARD:
+        UHD_ASSERT_THROW(key.name == "");
+        val = _mboard_proxy->get_link();
+        return;
+
+    case DEVICE_PROP_MBOARD_NAMES:
+        val = prop_names_t(1, ""); //vector of size 1 with empty string
+        return;
+
+    default: UHD_THROW_PROP_GET_ERROR();
+    }
+}
+
+/***********************************************************************
+ * Device Set
+ **********************************************************************/
+void usrp1_impl::set(const wax::obj &, const wax::obj &)
+{
+    UHD_THROW_PROP_SET_ERROR();
+}
diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp
new file mode 100644
index 000000000..c2f693eeb
--- /dev/null
+++ b/host/lib/usrp/usrp1/usrp1_impl.hpp
@@ -0,0 +1,197 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "usrp1_iface.hpp"
+#include "usrp1_ctrl.hpp"
+#include "clock_ctrl.hpp"
+#include "codec_ctrl.hpp"
+#include <uhd/device.hpp>
+#include <uhd/utils/pimpl.hpp>
+#include <uhd/types/dict.hpp>
+#include <uhd/types/otw_type.hpp>
+#include <uhd/types/clock_config.hpp>
+#include <uhd/types/stream_cmd.hpp>
+#include <uhd/usrp/dboard_id.hpp>
+#include <uhd/usrp/subdev_spec.hpp>
+#include <uhd/usrp/dboard_eeprom.hpp>
+#include <uhd/usrp/dboard_manager.hpp>
+#include <uhd/transport/usb_zero_copy.hpp>
+
+#ifndef INCLUDED_USRP1_IMPL_HPP
+#define INCLUDED_USRP1_IMPL_HPP
+
+/*!
+ * Simple wax obj proxy class:
+ * Provides a wax obj interface for a set and a get function.
+ * This allows us to create nested properties structures
+ * while maintaining flattened code within the implementation.
+ */
+class wax_obj_proxy : public wax::obj {
+public:
+    typedef boost::function<void(const wax::obj &, wax::obj &)>       get_t;
+    typedef boost::function<void(const wax::obj &, const wax::obj &)> set_t;
+    typedef boost::shared_ptr<wax_obj_proxy> sptr;
+
+    static sptr make(const get_t &get, const set_t &set){
+        return sptr(new wax_obj_proxy(get, set));
+    }
+
+private:
+    get_t _get; set_t _set;
+    wax_obj_proxy(const get_t &get, const set_t &set): _get(get), _set(set) {};
+    void get(const wax::obj &key, wax::obj &val) {return _get(key, val);}
+    void set(const wax::obj &key, const wax::obj &val) {return _set(key, val);}
+};
+
+/*!
+ * USRP1 implementation guts:
+ * The implementation details are encapsulated here.
+ * Handles properties on the mboard, dboard, dsps...
+ */
+class usrp1_impl : public uhd::device {
+public:
+    //! used everywhere to differentiate slots/sides...
+    enum dboard_slot_t{
+        DBOARD_SLOT_A = 'A',
+        DBOARD_SLOT_B = 'B'
+    };
+    //and a way to enumerate through a list of the above...
+    static const std::vector<dboard_slot_t> _dboard_slots;
+
+    //structors
+    usrp1_impl(uhd::transport::usb_zero_copy::sptr data_transport,
+               usrp_ctrl::sptr ctrl_transport);
+
+    ~usrp1_impl(void);
+
+    //the io interface
+    size_t send(const std::vector<const void *> &,
+                size_t,
+                const uhd::tx_metadata_t &,
+                const uhd::io_type_t &,
+                send_mode_t);
+
+    size_t recv(const std::vector<void *> &,
+                size_t, uhd::rx_metadata_t &,
+                const uhd::io_type_t &,
+                recv_mode_t,
+                size_t timeout);
+
+    size_t get_max_send_samps_per_packet(void) const { return 0; }
+    size_t get_max_recv_samps_per_packet(void) const { return 0; }
+    bool recv_async_msg(uhd::async_metadata_t &, size_t);
+
+private:
+    /*!
+     * Make a usrp1 dboard interface.
+     * \param iface the usrp1 interface object
+     * \param clock the clock control interface
+     * \param codec the codec control interface
+     * \param dboard_slot the slot identifier
+     * \param rx_dboard_id the db id for the rx board (used for evil dbsrx purposes)
+     * \return a sptr to a new dboard interface
+     */
+    static uhd::usrp::dboard_iface::sptr make_dboard_iface(
+        usrp1_iface::sptr iface,
+        usrp1_clock_ctrl::sptr clock,
+        usrp1_codec_ctrl::sptr codec,
+        dboard_slot_t dboard_slot,
+        const uhd::usrp::dboard_id_t &rx_dboard_id
+    );
+
+    //interface to ioctls and file descriptor
+    usrp1_iface::sptr _iface;
+
+    //handle io stuff
+    UHD_PIMPL_DECL(io_impl) _io_impl;
+    void io_init(void);
+    void issue_stream_cmd(const uhd::stream_cmd_t &stream_cmd);
+    void handle_overrun(size_t);
+
+    //underrun and overrun poll intervals
+    size_t _rx_samps_per_poll_interval;
+    size_t _tx_samps_per_poll_interval; 
+
+    //otw types
+    uhd::otw_type_t _rx_otw_type;
+    uhd::otw_type_t _tx_otw_type;
+
+    //configuration shadows
+    uhd::clock_config_t _clock_config;
+    uhd::usrp::subdev_spec_t _rx_subdev_spec, _tx_subdev_spec;
+
+    //clock control
+    usrp1_clock_ctrl::sptr _clock_ctrl;
+
+    //ad9862 codec control interface
+    uhd::dict<dboard_slot_t, usrp1_codec_ctrl::sptr> _codec_ctrls;
+
+    //codec properties interfaces
+    void codec_init(void);
+    void rx_codec_get(const wax::obj &, wax::obj &, dboard_slot_t);
+    void rx_codec_set(const wax::obj &, const wax::obj &, dboard_slot_t);
+    void tx_codec_get(const wax::obj &, wax::obj &, dboard_slot_t);
+    void tx_codec_set(const wax::obj &, const wax::obj &, dboard_slot_t);
+    uhd::dict<dboard_slot_t, wax_obj_proxy::sptr> _rx_codec_proxies, _tx_codec_proxies;
+
+    //device functions and settings
+    void get(const wax::obj &, wax::obj &);
+    void set(const wax::obj &, const wax::obj &);
+
+    //mboard functions and settings
+    void mboard_init(void);
+    void mboard_get(const wax::obj &, wax::obj &);
+    void mboard_set(const wax::obj &, const wax::obj &);
+    wax_obj_proxy::sptr _mboard_proxy;
+
+    //xx dboard functions and settings
+    void dboard_init(void);
+    uhd::dict<dboard_slot_t, uhd::usrp::dboard_manager::sptr> _dboard_managers;
+    uhd::dict<dboard_slot_t, uhd::usrp::dboard_iface::sptr> _dboard_ifaces;
+
+    //rx dboard functions and settings
+    uhd::dict<dboard_slot_t, uhd::usrp::dboard_eeprom_t> _rx_db_eeproms;
+    void rx_dboard_get(const wax::obj &, wax::obj &, dboard_slot_t);
+    void rx_dboard_set(const wax::obj &, const wax::obj &, dboard_slot_t);
+    uhd::dict<dboard_slot_t, wax_obj_proxy::sptr> _rx_dboard_proxies;
+
+    //tx dboard functions and settings
+    uhd::dict<dboard_slot_t, uhd::usrp::dboard_eeprom_t> _tx_db_eeproms;
+    void tx_dboard_get(const wax::obj &, wax::obj &, dboard_slot_t);
+    void tx_dboard_set(const wax::obj &, const wax::obj &, dboard_slot_t);
+    uhd::dict<dboard_slot_t, wax_obj_proxy::sptr> _tx_dboard_proxies;
+
+    //rx dsp functions and settings
+    void rx_dsp_init(void);
+    void rx_dsp_get(const wax::obj &, wax::obj &);
+    void rx_dsp_set(const wax::obj &, const wax::obj &);
+    double _rx_dsp_freq; size_t _rx_dsp_decim;
+    wax_obj_proxy::sptr _rx_dsp_proxy;
+
+    //tx dsp functions and settings
+    void tx_dsp_init(void);
+    void tx_dsp_get(const wax::obj &, wax::obj &);
+    void tx_dsp_set(const wax::obj &, const wax::obj &);
+    double _tx_dsp_freq; size_t _tx_dsp_interp;
+    wax_obj_proxy::sptr _tx_dsp_proxy;
+
+    //transports
+    uhd::transport::usb_zero_copy::sptr _data_transport;
+    usrp_ctrl::sptr _ctrl_transport;
+};
+
+#endif /* INCLUDED_USRP1_IMPL_HPP */
diff --git a/host/lib/usrp/usrp2/CMakeLists.txt b/host/lib/usrp/usrp2/CMakeLists.txt
index 47d74cec8..f7984fce5 100644
--- a/host/lib/usrp/usrp2/CMakeLists.txt
+++ b/host/lib/usrp/usrp2/CMakeLists.txt
@@ -17,25 +17,46 @@
 
 #This file will be included by cmake, use absolute paths!
 
-LIBUHD_APPEND_SOURCES(
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/clock_ctrl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/clock_ctrl.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_ctrl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_ctrl.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dboard_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dboard_iface.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dsp_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/gps_ctrl.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/gps_ctrl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/io_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/mboard_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/serdes_ctrl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/serdes_ctrl.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_iface.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_iface.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_impl.cpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_impl.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_regs.hpp
-    ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_regs.cpp
-)
+########################################################################
+# Conditionally configure the USRP2 support
+########################################################################
+MESSAGE(STATUS "Configuring USRP2 support...")
+
+IF(DEFINED ENABLE_USRP2)
+    IF(ENABLE_USRP2)
+        MESSAGE(STATUS "USRP2 support enabled by configure flag")
+    ELSE(ENABLE_USRP2)
+        MESSAGE(STATUS "USRP2 support disabled by configure flag")
+    ENDIF(ENABLE_USRP2)
+ELSE(DEFINED ENABLE_USRP2) #not defined: automatic enabling of component
+    SET(ENABLE_USRP2 TRUE)
+ENDIF(DEFINED ENABLE_USRP2)
+SET(ENABLE_USRP2 ${ENABLE_USRP2} CACHE BOOL "enable USRP2 support")
+
+IF(ENABLE_USRP2)
+    MESSAGE(STATUS "  Building USRP2 support.")
+    LIBUHD_APPEND_SOURCES(
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/clock_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/clock_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/codec_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dboard_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dboard_iface.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/dsp_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/gps_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/gps_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/io_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/mboard_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/serdes_ctrl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/serdes_ctrl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_iface.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_iface.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_impl.cpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_impl.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_regs.hpp
+        ${CMAKE_SOURCE_DIR}/lib/usrp/usrp2/usrp2_regs.cpp
+    )
+ELSE(ENABLE_USRP2)
+    MESSAGE(STATUS "  Skipping USRP2 support.")
+ENDIF(ENABLE_USRP2)
diff --git a/host/lib/usrp/usrp2/codec_ctrl.cpp b/host/lib/usrp/usrp2/codec_ctrl.cpp
index e5be62205..22a892f02 100644
--- a/host/lib/usrp/usrp2/codec_ctrl.cpp
+++ b/host/lib/usrp/usrp2/codec_ctrl.cpp
@@ -66,8 +66,8 @@ public:
           this->send_ads62p44_reg(0x00); //issue a reset to the ADC
           //everything else should be pretty much default, i think
 //          _ads62p44_regs.decimation = DECIMATION_DECIMATE_1;
-          
-
+          _ads62p44_regs.power_down = ads62p44_regs_t::POWER_DOWN_NORMAL;
+          this->send_ads62p44_reg(0x14);
         }
     }
 
diff --git a/host/lib/usrp/usrp2/fw_common.h b/host/lib/usrp/usrp2/fw_common.h
index 4d3b62d6b..12ff1a76f 100644
--- a/host/lib/usrp/usrp2/fw_common.h
+++ b/host/lib/usrp/usrp2/fw_common.h
@@ -33,7 +33,7 @@ extern "C" {
 #endif
 
 //fpga and firmware compatibility numbers
-#define USRP2_FPGA_COMPAT_NUM 1
+#define USRP2_FPGA_COMPAT_NUM 2
 #define USRP2_FW_COMPAT_NUM 6
 
 //used to differentiate control packets over data port
diff --git a/host/lib/usrp/usrp2/io_impl.cpp b/host/lib/usrp/usrp2/io_impl.cpp
index c67bd02fd..94ff5c2ce 100644
--- a/host/lib/usrp/usrp2/io_impl.cpp
+++ b/host/lib/usrp/usrp2/io_impl.cpp
@@ -113,7 +113,7 @@ void usrp2_impl::io_impl::recv_pirate_loop(
                 metadata.event_code = vrt_packet_handler::get_context_code<async_metadata_t::event_code_t>(vrt_hdr, if_packet_info);
 
                 //print the famous U, and push the metadata into the message queue
-                if (metadata.event_code & underflow_flags) std::cerr << "U";
+                if (metadata.event_code & underflow_flags) std::cerr << "U" << std::flush;
                 async_msg_fifo->push_with_pop_on_full(metadata);
                 continue;
             }
@@ -121,7 +121,7 @@ void usrp2_impl::io_impl::recv_pirate_loop(
             //handle the packet count / sequence number
             if (if_packet_info.packet_count != next_packet_seq){
                 //std::cerr << "S" << (if_packet_info.packet_count - next_packet_seq)%16;
-                std::cerr << "O"; //report overflow (drops in the kernel)
+                std::cerr << "O" << std::flush; //report overflow (drops in the kernel)
             }
             next_packet_seq = (if_packet_info.packet_count+1)%16;
 
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index b5a8ebc53..2669df9bc 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -77,12 +77,16 @@ usrp2_mboard_impl::usrp2_mboard_impl(
         _allowed_decim_and_interp_rates.push_back(i);
     }
 
+    //Issue a stop streaming command (in case it was left running).
+    //Since this command is issued before the networking is setup,
+    //most if not all junk packets will never make it to the socket.
+    this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+
     //setup the vrt rx registers
     _iface->poke32(_iface->regs.rx_ctrl_nsamps_per_pkt, _io_helper.get_max_recv_samps_per_packet());
     _iface->poke32(_iface->regs.rx_ctrl_nchannels, 1);
     _iface->poke32(_iface->regs.rx_ctrl_clear_overrun, 1); //reset
     _iface->poke32(_iface->regs.rx_ctrl_vrt_header, 0
-
         | (0x1 << 28) //if data with stream id
         | (0x1 << 26) //has trailer
         | (0x3 << 22) //integer time other
@@ -116,11 +120,6 @@ usrp2_mboard_impl::usrp2_mboard_impl(
     //set default subdev specs
     (*this)[MBOARD_PROP_RX_SUBDEV_SPEC] = subdev_spec_t();
     (*this)[MBOARD_PROP_TX_SUBDEV_SPEC] = subdev_spec_t();
-
-    //Issue a stop streaming command (in case it was left running).
-    //Since this command is issued before the networking is setup,
-    //most if not all junk packets will never make it to the socket.
-    this->issue_ddc_stream_cmd(stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
 }
 
 usrp2_mboard_impl::~usrp2_mboard_impl(void){
diff --git a/host/lib/usrp/usrp2/usrp2_regs.hpp b/host/lib/usrp/usrp2/usrp2_regs.hpp
index 0a171d20c..f74c78b7b 100644
--- a/host/lib/usrp/usrp2/usrp2_regs.hpp
+++ b/host/lib/usrp/usrp2/usrp2_regs.hpp
@@ -211,6 +211,7 @@ usrp2_regs_t usrp2_get_regs(int hw_rev);
    * </pre>
    */
 
+
 /////////////////////////////////////////////////
 // DSP RX Regs
 ////////////////////////////////////////////////
diff --git a/host/test/convert_types_test.cpp b/host/test/convert_types_test.cpp
index 1587be57f..2148302b6 100644
--- a/host/test/convert_types_test.cpp
+++ b/host/test/convert_types_test.cpp
@@ -17,109 +17,226 @@
 
 #include <uhd/transport/convert_types.hpp>
 #include <boost/test/unit_test.hpp>
+#include <boost/foreach.hpp>
 #include <boost/cstdint.hpp>
+#include <boost/asio/buffer.hpp>
 #include <complex>
+#include <vector>
+#include <cstdlib>
 
 using namespace uhd;
 
-template <typename host_type, typename dev_type, size_t nsamps>
-void loopback(
+//typedefs for complex types
+typedef std::complex<boost::int16_t> sc16_t;
+typedef std::complex<float> fc32_t;
+
+//extract pointer to POD since using &vector.front() throws in MSVC
+template <typename T> void * pod2ptr(T &pod){
+    return boost::asio::buffer_cast<void *>(boost::asio::buffer(pod));
+}
+template <typename T> const void * pod2ptr(const T &pod){
+    return boost::asio::buffer_cast<const void *>(boost::asio::buffer(pod));
+}
+
+/***********************************************************************
+ * Loopback runner:
+ *    convert input buffer into intermediate buffer
+ *    convert intermediate buffer into output buffer
+ **********************************************************************/
+template <typename Range> static void loopback(
+    size_t nsamps,
     const io_type_t &io_type,
     const otw_type_t &otw_type,
-    const host_type *input,
-    host_type *output
+    const Range &input,
+    Range &output
 ){
-    dev_type dev[nsamps];
+    //item32 is largest device type
+    std::vector<boost::uint32_t> dev(nsamps);
 
     //convert to dev type
     transport::convert_io_type_to_otw_type(
-        input, io_type,
-        dev, otw_type,
+        pod2ptr(input), io_type,
+        pod2ptr(dev), otw_type,
         nsamps
     );
 
     //convert back to host type
     transport::convert_otw_type_to_io_type(
-        dev, otw_type,
-        output, io_type,
+        pod2ptr(dev), otw_type,
+        pod2ptr(output), io_type,
         nsamps
     );
 }
 
-typedef std::complex<boost::uint16_t> sc16_t;
+/***********************************************************************
+ * Test short conversion
+ **********************************************************************/
+static void test_convert_types_sc16(
+    size_t nsamps,
+    const io_type_t &io_type,
+    const otw_type_t &otw_type
+){
+    //fill the input samples
+    std::vector<sc16_t> input(nsamps), output(nsamps);
+    BOOST_FOREACH(sc16_t &in, input) in = sc16_t(
+        std::rand()-(RAND_MAX/2),
+        std::rand()-(RAND_MAX/2)
+    );
 
-BOOST_AUTO_TEST_CASE(test_convert_types_be_sc16){
-    sc16_t in_sc16[] = {
-        sc16_t(0, -1234), sc16_t(4321, 1234),
-        sc16_t(9876, -4567), sc16_t(8912, 0)
-    }, out_sc16[4];
+    //run the loopback and test
+    loopback(nsamps, io_type, otw_type, input, output);
+    BOOST_CHECK_EQUAL_COLLECTIONS(input.begin(), input.end(), output.begin(), output.end());
+}
 
+BOOST_AUTO_TEST_CASE(test_convert_types_be_sc16){
     io_type_t io_type(io_type_t::COMPLEX_INT16);
     otw_type_t otw_type;
     otw_type.byteorder = otw_type_t::BO_BIG_ENDIAN;
     otw_type.width = 16;
 
-    loopback<sc16_t, boost::uint32_t, 4>(io_type, otw_type, in_sc16, out_sc16);
-    BOOST_CHECK_EQUAL_COLLECTIONS(in_sc16, in_sc16+4, out_sc16, out_sc16+4);
+    //try various lengths to test edge cases
+    for (size_t nsamps = 0; nsamps < 16; nsamps++){
+        test_convert_types_sc16(nsamps, io_type, otw_type);
+    }
 }
 
 BOOST_AUTO_TEST_CASE(test_convert_types_le_sc16){
-    sc16_t in_sc16[] = {
-        sc16_t(0, -1234), sc16_t(4321, 1234),
-        sc16_t(9876, -4567), sc16_t(8912, 0)
-    }, out_sc16[4];
-
     io_type_t io_type(io_type_t::COMPLEX_INT16);
     otw_type_t otw_type;
     otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN;
     otw_type.width = 16;
 
-    loopback<sc16_t, boost::uint32_t, 4>(io_type, otw_type, in_sc16, out_sc16);
-    BOOST_CHECK_EQUAL_COLLECTIONS(in_sc16, in_sc16+4, out_sc16, out_sc16+4);
+    //try various lengths to test edge cases
+    for (size_t nsamps = 0; nsamps < 16; nsamps++){
+        test_convert_types_sc16(nsamps, io_type, otw_type);
+    }
 }
 
-typedef std::complex<float> fc32_t;
-
-#define BOOST_CHECK_CLOSE_COMPLEX(a1, a2, p) \
-    BOOST_CHECK_CLOSE(a1.real(), a2.real(), p); \
-    BOOST_CHECK_CLOSE(a1.imag(), a2.imag(), p);
+/***********************************************************************
+ * Test float conversion
+ **********************************************************************/
+static void test_convert_types_fc32(
+    size_t nsamps,
+    const io_type_t &io_type,
+    const otw_type_t &otw_type
+){
+    //fill the input samples
+    std::vector<fc32_t> input(nsamps), output(nsamps);
+    BOOST_FOREACH(fc32_t &in, input) in = fc32_t(
+        (std::rand()/float(RAND_MAX/2)) - 1,
+        (std::rand()/float(RAND_MAX/2)) - 1
+    );
 
-static const float tolerance = float(0.1);
+    //run the loopback and test
+    loopback(nsamps, io_type, otw_type, input, output);
+    for (size_t i = 0; i < nsamps; i++){
+        BOOST_CHECK_CLOSE_FRACTION(input[i].real(), output[i].real(), float(0.01));
+        BOOST_CHECK_CLOSE_FRACTION(input[i].imag(), output[i].imag(), float(0.01));
+    }
+}
 
 BOOST_AUTO_TEST_CASE(test_convert_types_be_fc32){
-    fc32_t in_fc32[] = {
-        fc32_t(float(0), float(-0.2)), fc32_t(float(0.03), float(-0.16)),
-        fc32_t(float(1.0), float(.45)), fc32_t(float(0.09), float(0))
-    }, out_fc32[4];
-
     io_type_t io_type(io_type_t::COMPLEX_FLOAT32);
     otw_type_t otw_type;
     otw_type.byteorder = otw_type_t::BO_BIG_ENDIAN;
     otw_type.width = 16;
 
-    loopback<fc32_t, boost::uint32_t, 4>(io_type, otw_type, in_fc32, out_fc32);
-
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[0], out_fc32[0], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[1], out_fc32[1], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[2], out_fc32[2], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[3], out_fc32[3], tolerance);
+    //try various lengths to test edge cases
+    for (size_t nsamps = 0; nsamps < 16; nsamps++){
+        test_convert_types_fc32(nsamps, io_type, otw_type);
+    }
 }
 
 BOOST_AUTO_TEST_CASE(test_convert_types_le_fc32){
-    fc32_t in_fc32[] = {
-        fc32_t(float(0), float(-0.2)), fc32_t(float(0.03), float(-0.16)),
-        fc32_t(float(1.0), float(.45)), fc32_t(float(0.09), float(0))
-    }, out_fc32[4];
-
     io_type_t io_type(io_type_t::COMPLEX_FLOAT32);
     otw_type_t otw_type;
     otw_type.byteorder = otw_type_t::BO_LITTLE_ENDIAN;
     otw_type.width = 16;
 
-    loopback<fc32_t, boost::uint32_t, 4>(io_type, otw_type, in_fc32, out_fc32);
+    //try various lengths to test edge cases
+    for (size_t nsamps = 0; nsamps < 16; nsamps++){
+        test_convert_types_fc32(nsamps, io_type, otw_type);
+    }
+}
+
+/***********************************************************************
+ * Test float to short conversion loopback
+ **********************************************************************/
+BOOST_AUTO_TEST_CASE(test_convert_types_fc32_to_sc16){
+    io_type_t io_type_in(io_type_t::COMPLEX_FLOAT32);
+    io_type_t io_type_out(io_type_t::COMPLEX_INT16);
+
+    otw_type_t otw_type;
+    otw_type.byteorder = otw_type_t::BO_NATIVE;
+    otw_type.width = 16;
+
+    const size_t nsamps = 13;
+    std::vector<fc32_t> input(nsamps);
+    BOOST_FOREACH(fc32_t &in, input) in = fc32_t(
+        (std::rand()/float(RAND_MAX/2)) - 1,
+        (std::rand()/float(RAND_MAX/2)) - 1
+    );
+
+    //convert float to dev
+    std::vector<boost::uint32_t> tmp(nsamps);
+    transport::convert_io_type_to_otw_type(
+        pod2ptr(input), io_type_in,
+        pod2ptr(tmp), otw_type,
+        nsamps
+    );
+
+    //convert dev to short
+    std::vector<sc16_t> output(nsamps);
+    transport::convert_otw_type_to_io_type(
+        pod2ptr(tmp), otw_type,
+        pod2ptr(output), io_type_out,
+        nsamps
+    );
+
+    //test that the inputs and outputs match
+    for (size_t i = 0; i < nsamps; i++){
+        BOOST_CHECK_CLOSE_FRACTION(input[i].real(), output[i].real()/float(32767), float(0.01));
+        BOOST_CHECK_CLOSE_FRACTION(input[i].imag(), output[i].imag()/float(32767), float(0.01));
+    }
+}
+
+/***********************************************************************
+ * Test short to float conversion loopback
+ **********************************************************************/
+BOOST_AUTO_TEST_CASE(test_convert_types_sc16_to_fc32){
+    io_type_t io_type_in(io_type_t::COMPLEX_INT16);
+    io_type_t io_type_out(io_type_t::COMPLEX_FLOAT32);
+
+    otw_type_t otw_type;
+    otw_type.byteorder = otw_type_t::BO_NATIVE;
+    otw_type.width = 16;
+
+    const size_t nsamps = 13;
+    std::vector<sc16_t> input(nsamps);
+    BOOST_FOREACH(sc16_t &in, input) in = sc16_t(
+        std::rand()-(RAND_MAX/2),
+        std::rand()-(RAND_MAX/2)
+    );
+
+    //convert short to dev
+    std::vector<boost::uint32_t> tmp(nsamps);
+    transport::convert_io_type_to_otw_type(
+        pod2ptr(input), io_type_in,
+        pod2ptr(tmp), otw_type,
+        nsamps
+    );
+
+    //convert dev to float
+    std::vector<fc32_t> output(nsamps);
+    transport::convert_otw_type_to_io_type(
+        pod2ptr(tmp), otw_type,
+        pod2ptr(output), io_type_out,
+        nsamps
+    );
 
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[0], out_fc32[0], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[1], out_fc32[1], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[2], out_fc32[2], tolerance);
-    BOOST_CHECK_CLOSE_COMPLEX(in_fc32[3], out_fc32[3], tolerance);
+    //test that the inputs and outputs match
+    for (size_t i = 0; i < nsamps; i++){
+        BOOST_CHECK_CLOSE_FRACTION(input[i].real()/float(32767), output[i].real(), float(0.01));
+        BOOST_CHECK_CLOSE_FRACTION(input[i].imag()/float(32767), output[i].imag(), float(0.01));
+    }
 }
diff --git a/host/utils/CMakeLists.txt b/host/utils/CMakeLists.txt
index c349a9018..a95864ca7 100644
--- a/host/utils/CMakeLists.txt
+++ b/host/utils/CMakeLists.txt
@@ -39,9 +39,17 @@ TARGET_LINK_LIBRARIES(usrp2_addr_burner uhd)
 ADD_EXECUTABLE(usrp_burn_db_eeprom usrp_burn_db_eeprom.cpp)
 TARGET_LINK_LIBRARIES(usrp_burn_db_eeprom uhd)
 
+ADD_EXECUTABLE(usrp1_init_eeprom usrp1_init_eeprom.cpp)
+TARGET_LINK_LIBRARIES(usrp1_init_eeprom uhd)
+
+ADD_EXECUTABLE(usrp1_serial_burner usrp1_serial_burner.cpp)
+TARGET_LINK_LIBRARIES(usrp1_serial_burner uhd)
+
 INSTALL(TARGETS
     usrp2_addr_burner
     usrp_burn_db_eeprom
+    usrp1_init_eeprom
+    usrp1_serial_burner
     RUNTIME DESTINATION ${PKG_DATA_DIR}/utils
 )
 
diff --git a/host/utils/usrp1_init_eeprom.cpp b/host/utils/usrp1_init_eeprom.cpp
new file mode 100644
index 000000000..b05e400b1
--- /dev/null
+++ b/host/utils/usrp1_init_eeprom.cpp
@@ -0,0 +1,69 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/device.hpp>
+#include <uhd/usrp/device_props.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+
+namespace po = boost::program_options;
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("image", po::value<std::string>(), "BIN image file")
+    ;
+
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm); 
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("USRP EEPROM initialization %s") % desc << std::endl;
+        return ~0;
+    }
+
+    //load the options into the address
+    uhd::device_addr_t device_addr;
+    device_addr["type"] = "usrp1";
+    device_addr["uninit"] = "yeah"; //tell find to look for an uninitialized FX2
+
+    //find and create a control transport to do the writing.
+
+    uhd::device_addrs_t found_addrs = uhd::device::find(device_addr);
+
+    if (found_addrs.size() == 0){
+        std::cerr << "No uninitialized USRP devices found" << std::endl;
+        return ~0;
+    }
+
+    for (size_t i = 0; i < found_addrs.size(); i++){
+        std::cout << "Writing EEPROM data..." << std::endl;
+        //uhd::device_addrs_t devs = uhd::device::find(found_addrs[i]);
+        uhd::device::sptr dev = uhd::device::make(found_addrs[i]);
+        wax::obj mb = (*dev)[uhd::usrp::DEVICE_PROP_MBOARD];
+        mb[std::string("load_eeprom")] = vm["image"].as<std::string>();
+    }
+
+
+    std::cout << "Power-cycle the usrp for the changes to take effect." << std::endl;
+    return 0;
+}
diff --git a/host/utils/usrp1_serial_burner.cpp b/host/utils/usrp1_serial_burner.cpp
new file mode 100644
index 000000000..bf7d3d3bb
--- /dev/null
+++ b/host/utils/usrp1_serial_burner.cpp
@@ -0,0 +1,75 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/device.hpp>
+#include <uhd/usrp/device_props.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <iostream>
+
+namespace po = boost::program_options;
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("old", po::value<std::string>(), "old USRP serial number (optional)")
+        ("new", po::value<std::string>(), "new USRP serial number")
+    ;
+
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm); 
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("USRP serial burner %s") % desc << std::endl;
+        return ~0;
+    }
+
+    if(vm.count("new") == 0) {
+        std::cout << "error: must input --new arg" << std::endl;
+        return ~0;
+    }
+
+    //load the options into the address
+    uhd::device_addr_t device_addr;
+    device_addr["type"] = "usrp1";
+    if(vm.count("old")) device_addr["serial"] = vm["old"].as<std::string>();
+
+    //find and create a control transport to do the writing.
+
+    uhd::device_addrs_t found_addrs = uhd::device::find(device_addr);
+
+    if (found_addrs.size() == 0){
+        std::cerr << "No USRP devices found" << std::endl;
+        return ~0;
+    }
+
+    for (size_t i = 0; i < found_addrs.size(); i++){
+        uhd::device::sptr dev = uhd::device::make(found_addrs[i]);
+        wax::obj mb = (*dev)[uhd::usrp::DEVICE_PROP_MBOARD];
+        std::cout << "Writing serial number..." << std::endl;
+        mb[std::string("serial")] = vm["new"].as<std::string>();
+        std::cout << "Reading back serial number: " << mb[std::string("serial")].as<std::string>() << std::endl;
+    }
+
+
+    std::cout << "Power-cycle the usrp for the changes to take effect." << std::endl;
+    return 0;
+}
diff --git a/host/utils/usrp_burn_db_eeprom.cpp b/host/utils/usrp_burn_db_eeprom.cpp
index db2981e87..64ecf75d6 100644
--- a/host/utils/usrp_burn_db_eeprom.cpp
+++ b/host/utils/usrp_burn_db_eeprom.cpp
@@ -19,6 +19,7 @@
 #include <uhd/utils/safe_main.hpp>
 #include <uhd/device.hpp>
 #include <uhd/types/dict.hpp>
+#include <uhd/utils/assert.hpp>
 #include <uhd/usrp/dboard_id.hpp>
 #include <uhd/usrp/device_props.hpp>
 #include <uhd/usrp/mboard_props.hpp>
@@ -34,16 +35,19 @@ namespace po = boost::program_options;
 
 int UHD_SAFE_MAIN(int argc, char *argv[]){
     //command line variables
-    std::string args, db_name, unit;
+    std::string args, slot, unit;
     static const uhd::dict<std::string, mboard_prop_t> unit_to_db_prop = boost::assign::map_list_of
         ("RX", MBOARD_PROP_RX_DBOARD) ("TX", MBOARD_PROP_TX_DBOARD)
     ;
+    static const uhd::dict<std::string, mboard_prop_t> unit_to_db_names_prop = boost::assign::map_list_of
+        ("RX", MBOARD_PROP_RX_DBOARD_NAMES) ("TX", MBOARD_PROP_TX_DBOARD_NAMES)
+    ;
 
     po::options_description desc("Allowed options");
     desc.add_options()
         ("help", "help message")
         ("args", po::value<std::string>(&args)->default_value(""),    "device address args [default = \"\"]")
-        ("db",   po::value<std::string>(&db_name)->default_value(""), "dboard name [default = \"\"]")
+        ("slot", po::value<std::string>(&slot)->default_value(""),    "dboard slot name [default is blank for automatic]")
         ("unit", po::value<std::string>(&unit)->default_value(""),    "which unit [RX or TX]")
         ("id",   po::value<std::string>(),                            "dboard id to burn, omit for readback")
     ;
@@ -70,8 +74,11 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
 
     //make the device and extract the dboard w/ property
     device::sptr dev = device::make(args);
-    wax::obj dboard = (*dev)[DEVICE_PROP_MBOARD][named_prop_t(unit_to_db_prop[unit], db_name)];
-    std::string prefix = (db_name == "")? unit : (unit + ":" + db_name);
+    uhd::prop_names_t dboard_names = (*dev)[DEVICE_PROP_MBOARD][unit_to_db_names_prop[unit]].as<uhd::prop_names_t>();
+    if (dboard_names.size() == 1 and slot.empty()) slot = dboard_names.front();
+    uhd::assert_has(dboard_names, slot, "dboard slot name");
+    wax::obj dboard = (*dev)[DEVICE_PROP_MBOARD][named_prop_t(unit_to_db_prop[unit], slot)];
+    std::string prefix = unit + ":" + slot;
 
     //read the current dboard id from eeprom
     if (vm.count("id") == 0){
diff --git a/images/Makefile b/images/Makefile
index 6ab54e6ac..57277e787 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -31,8 +31,57 @@ CMAKE_BUILD_DIR = $(TOP_DIR)/build
 IMAGES_LIST =
 
 ########################################################################
+# Utility Checks
+########################################################################
+ifeq ($(shell sdcc --help > /dev/null 2>&1 && echo $$?),0)
+	HAS_SDCC=1
+endif
+
+ifeq ($(shell mb-gcc --help > /dev/null 2>&1 && echo $$?),0)
+	HAS_MB_GCC=1
+endif
+
+ifeq ($(shell xtclsh -h > /dev/null 2>&1 && echo $$?),0)
+	HAS_XTCLSH=1
+endif
+
+########################################################################
+# USRP1 firmware
+########################################################################
+ifdef HAS_SDCC
+
+_usrp1_fw_dir = $(TOP_FW_DIR)/fx2
+_usrp1_fw_ihx = $(BUILT_IMAGES_DIR)/usrp1_fw.ihx
+IMAGES_LIST += $(_usrp1_fw_ihx)
+
+$(_usrp1_fw_ihx):
+	cd $(_usrp1_fw_dir) && ./bootstrap
+	cd $(_usrp1_fw_dir) && ./configure
+	make -C $(_usrp1_fw_dir) clean
+	make -C $(_usrp1_fw_dir) all
+	cp $(_usrp1_fw_dir)/src/usrp1/std.ihx $@
+
+endif
+
+########################################################################
+# USRP1 fpga
+########################################################################
+_usrp1_fpga_dir = $(TOP_FPGA_DIR)/usrp1/rbf/rev4
+_usrp1_fpga_rbf = $(BUILT_IMAGES_DIR)/usrp1_fpga.rbf
+_usrp1_fpga_4rx_rbf = $(BUILT_IMAGES_DIR)/usrp1_fpga_4rx.rbf
+IMAGES_LIST += $(_usrp1_fpga_rbf) $(_usrp1_fpga_4rx_rbf)
+
+$(_usrp1_fpga_rbf):
+	cp $(_usrp1_fpga_dir)/std_2rxhb_2tx.rbf $@
+
+$(_usrp1_fpga_4rx_rbf):
+	cp $(_usrp1_fpga_dir)/std_4rx_0tx.rbf $@
+
+########################################################################
 # USRP2 firmware
 ########################################################################
+ifdef HAS_MB_GCC
+
 _usrp2_fw_dir = $(TOP_FW_DIR)/microblaze
 _usrp2_fw_bin = $(BUILT_IMAGES_DIR)/usrp2_fw.bin
 IMAGES_LIST += $(_usrp2_fw_bin)
@@ -44,9 +93,13 @@ $(_usrp2_fw_bin):
 	make -C $(_usrp2_fw_dir) all
 	cp $(_usrp2_fw_dir)/usrp2/usrp2_txrx_uhd.bin $@
 
+endif
+
 ########################################################################
 # USRP2 fpga
 ########################################################################
+ifdef HAS_XTCLSH
+
 _usrp2_fpga_dir = $(TOP_FPGA_DIR)/usrp2/top/u2_rev3
 _usrp2_fpga_bin = $(BUILT_IMAGES_DIR)/usrp2_fpga.bin
 IMAGES_LIST += $(_usrp2_fpga_bin)
@@ -56,6 +109,8 @@ $(_usrp2_fpga_bin):
 	cd $(_usrp2_fpga_dir) && make -f Makefile.udp bin
 	cp $(_usrp2_fpga_dir)/build-udp/u2_rev3.bin $@
 
+endif
+
 ########################################################################
 # Build rules
 ########################################################################
diff --git a/images/README b/images/README
index ec8391826..2f9c6a95e 100644
--- a/images/README
+++ b/images/README
@@ -18,3 +18,8 @@ To build the package (unix):
 
 The package generator types are described here:
     http://www.cmake.org/Wiki/CMake:CPackPackageGenerators
+
+Fedora note:
+    The sdcc binaries are prefixed with "sdcc-" which breaks the build.
+    However, /usr/libexec/sdcc contains properly named sdcc binaries.
+    export PATH=${PATH}:/usr/libexec/sdcc