1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
;--------------------------------------------------------------------------
; crtxclear.asm - C run-time: clear XSEG
;
; Copyright (C) 2004, Erik Petrich
;
; This library 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, or (at your option) any
; later version.
;
; This library 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 library; see the file COPYING. If not, write to the
; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
; MA 02110-1301, USA.
;
; As a special exception, if you link this library with other files,
; some of which are compiled with SDCC, to produce an executable,
; this library does not by itself cause the resulting executable to
; be covered by the GNU General Public License. This exception does
; not however invalidate any other reasons why the executable file
; might be covered by the GNU General Public License.
;--------------------------------------------------------------------------
.area CSEG (CODE)
.area GSINIT0 (CODE)
.area GSINIT1 (CODE)
.area GSINIT2 (CODE)
.area GSINIT3 (CODE)
.area GSINIT4 (CODE)
.area GSINIT5 (CODE)
.area GSINIT (CODE)
.area GSFINAL (CODE)
.area GSINIT4 (CODE)
__mcs51_genXRAMCLEAR::
mov r0,#l_PSEG
mov a,r0
orl a,#(l_PSEG >> 8)
jz 00006$
mov r1,#s_PSEG
mov __XPAGE,#(s_PSEG >> 8)
clr a
00005$: movx @r1,a
inc r1
djnz r0,00005$
00006$:
mov r0,#l_XSEG
mov a,r0
orl a,#(l_XSEG >> 8)
jz 00008$
mov r1,#((l_XSEG + 255) >> 8)
mov dptr,#s_XSEG
clr a
00007$: movx @dptr,a
inc dptr
djnz r0,00007$
djnz r1,00007$
00008$:
|
