diff options
Diffstat (limited to 'firmware/fx2/src/common/_startup.a51.brittle')
| -rw-r--r-- | firmware/fx2/src/common/_startup.a51.brittle | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/firmware/fx2/src/common/_startup.a51.brittle b/firmware/fx2/src/common/_startup.a51.brittle deleted file mode 100644 index 2996275cf..000000000 --- a/firmware/fx2/src/common/_startup.a51.brittle +++ /dev/null @@ -1,78 +0,0 @@ -;;; -*- 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 |