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Diffstat (limited to 'firmware/fx2/src/common/_startup.a51')
| -rw-r--r-- | firmware/fx2/src/common/_startup.a51 | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/firmware/fx2/src/common/_startup.a51 b/firmware/fx2/src/common/_startup.a51 deleted file mode 100644 index 30a907857..000000000 --- a/firmware/fx2/src/common/_startup.a51 +++ /dev/null @@ -1,80 +0,0 @@ -;;; -*- 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 |