📄 startup.lst
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A51 MACRO ASSEMBLER STARTUP 05/07/2008 14:24:39 PAGE 1
MACRO ASSEMBLER A51 V6.12
OBJECT MODULE PLACED IN STARTUP.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE STARTUP.A51 SET(SMALL) DEBUG EP
LOC OBJ LINE SOURCE
1 $nomod51
2 ;------------------------------------------------------------------------------
3 ; This file is part of the C51 Compiler package
4 ; Copyright (c) 1988-2005 Keil Elektronik GmbH and Keil Software, Inc.
5 ; Version 8.01
6 ;
7 ; *** <<< Use Configuration Wizard in Context Menu >>> ***
8 ;------------------------------------------------------------------------------
9 ; STARTUP.A51: This code is executed after processor reset.
10 ;
11 ; To translate this file use A51 with the following invocation:
12 ;
13 ; A51 STARTUP.A51
14 ;
15 ; To link the modified STARTUP.OBJ file to your application use the following
16 ; Lx51 invocation:
17 ;
18 ; Lx51 your object file list, STARTUP.OBJ controls
19 ;
20 ;------------------------------------------------------------------------------
21 ;
22 ; User-defined <h> Power-On Initialization of Memory
23 ;
24 ; With the following EQU statements the initialization of memory
25 ; at processor reset can be defined:
26 ;
27 ; <o> IDATALEN: IDATA memory size <0x0-0x100>
28 ; <i> Note: The absolute start-address of IDATA memory is always 0
29 ; <i> The IDATA space overlaps physically the DATA and BIT areas.
0080 30 IDATALEN EQU 80H
31 ;
32 ; <o> XDATASTART: XDATA memory start address <0x0-0xFFFF>
33 ; <i> The absolute start address of XDATA memory
0000 34 XDATASTART EQU 0
35 ;
36 ; <o> XDATALEN: XDATA memory size <0x0-0xFFFF>
37 ; <i> The length of XDATA memory in bytes.
0000 38 XDATALEN EQU 0
39 ;
40 ; <o> PDATASTART: PDATA memory start address <0x0-0xFFFF>
41 ; <i> The absolute start address of PDATA memory
0000 42 PDATASTART EQU 0H
43 ;
44 ; <o> PDATALEN: PDATA memory size <0x0-0xFF>
45 ; <i> The length of PDATA memory in bytes.
0000 46 PDATALEN EQU 0H
47 ;
48 ;</h>
49 ;------------------------------------------------------------------------------
50 ;
51 ;<h> Reentrant Stack Initialization
52 ;
53 ; The following EQU statements define the stack pointer for reentrant
54 ; functions and initialized it:
55 ;
56 ; <h> Stack Space for reentrant functions in the SMALL model.
57 ; <q> IBPSTACK: Enable SMALL model reentrant stack
58 ; <i> Stack space for reentrant functions in the SMALL model.
A51 MACRO ASSEMBLER STARTUP 05/07/2008 14:24:39 PAGE 2
0000 59 IBPSTACK EQU 0 ; set to 1 if small reentrant is used.
60 ; <o> IBPSTACKTOP: End address of SMALL model stack <0x0-0xFF>
61 ; <i> Set the top of the stack to the highest location.
0100 62 IBPSTACKTOP EQU 0xFF +1 ; default 0FFH+1
63 ; </h>
64 ;
65 ; <h> Stack Space for reentrant functions in the LARGE model.
66 ; <q> XBPSTACK: Enable LARGE model reentrant stack
67 ; <i> Stack space for reentrant functions in the LARGE model.
0000 68 XBPSTACK EQU 0 ; set to 1 if large reentrant is used.
69 ; <o> XBPSTACKTOP: End address of LARGE model stack <0x0-0xFFFF>
70 ; <i> Set the top of the stack to the highest location.
0000 71 XBPSTACKTOP EQU 0xFFFF +1 ; default 0FFFFH+1
72 ; </h>
73 ;
74 ; <h> Stack Space for reentrant functions in the COMPACT model.
75 ; <q> PBPSTACK: Enable COMPACT model reentrant stack
76 ; <i> Stack space for reentrant functions in the COMPACT model.
0000 77 PBPSTACK EQU 0 ; set to 1 if compact reentrant is used.
78 ;
79 ; <o> PBPSTACKTOP: End address of COMPACT model stack <0x0-0xFFFF>
80 ; <i> Set the top of the stack to the highest location.
0100 81 PBPSTACKTOP EQU 0xFF +1 ; default 0FFH+1
82 ; </h>
83 ;</h>
84 ;------------------------------------------------------------------------------
85 ;
86 ; Memory Page for Using the Compact Model with 64 KByte xdata RAM
87 ; <e>Compact Model Page Definition
88 ;
89 ; <i>Define the XDATA page used for PDATA variables.
90 ; <i>PPAGE must conform with the PPAGE set in the linker invocation.
91 ;
92 ; Enable pdata memory page initalization
0000 93 PPAGEENABLE EQU 0 ; set to 1 if pdata object are used.
94 ;
95 ; <o> PPAGE number <0x0-0xFF>
96 ; <i> uppermost 256-byte address of the page used for PDATA variables.
0000 97 PPAGE EQU 0
98 ;
99 ; <o> SFR address which supplies uppermost address byte <0x0-0xFF>
100 ; <i> most 8051 variants use P2 as uppermost address byte
00A0 101 PPAGE_SFR DATA 0A0H
102 ;
103 ; </e>
104 ;------------------------------------------------------------------------------
105
106 ; Standard SFR Symbols
00E0 107 ACC DATA 0E0H
00F0 108 B DATA 0F0H
0081 109 SP DATA 81H
0082 110 DPL DATA 82H
0083 111 DPH DATA 83H
112 PUBLIC send
113 NAME ?C_STARTUP
114
115
116 ?C_C51STARTUP SEGMENT CODE
117 ?STACK SEGMENT IDATA
118
---- 119 RSEG ?STACK
0000 120 DS 1
121
122 EXTRN CODE (?C_START)
123 PUBLIC ?C_STARTUP
124
A51 MACRO ASSEMBLER STARTUP 05/07/2008 14:24:39 PAGE 3
---- 125 CSEG AT 0
0000 020000 F 126 ?C_STARTUP: LJMP STARTUP1
127
---- 128 RSEG ?C_C51STARTUP
129
0000 130 STARTUP1:
131
132 IF IDATALEN <> 0
0000 787F 133 MOV R0,#IDATALEN - 1
0002 E4 134 CLR A
0003 F6 135 IDATALOOP: MOV @R0,A
0004 D8FD 136 DJNZ R0,IDATALOOP
137 ENDIF
138
139 IF XDATALEN <> 0
MOV DPTR,#XDATASTART
MOV R7,#LOW (XDATALEN)
IF (LOW (XDATALEN)) <> 0
MOV R6,#(HIGH (XDATALEN)) +1
ELSE
MOV R6,#HIGH (XDATALEN)
ENDIF
CLR A
XDATALOOP: MOVX @DPTR,A
INC DPTR
DJNZ R7,XDATALOOP
DJNZ R6,XDATALOOP
ENDIF
153
154 IF PPAGEENABLE <> 0
MOV PPAGE_SFR,#PPAGE
ENDIF
157
158 IF PDATALEN <> 0
MOV R0,#LOW (PDATASTART)
MOV R7,#LOW (PDATALEN)
CLR A
PDATALOOP: MOVX @R0,A
INC R0
DJNZ R7,PDATALOOP
ENDIF
166
167 IF IBPSTACK <> 0
EXTRN DATA (?C_IBP)
MOV ?C_IBP,#LOW IBPSTACKTOP
ENDIF
172
173 IF XBPSTACK <> 0
EXTRN DATA (?C_XBP)
MOV ?C_XBP,#HIGH XBPSTACKTOP
MOV ?C_XBP+1,#LOW XBPSTACKTOP
ENDIF
179
180 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
184
0006 758100 F 185 MOV SP,#?STACK-1
186
187 ; This code is required if you use L51_BANK.A51 with Banking Mode 4
188 ;<h> Code Banking
189 ; <q> Select Bank 0 for L51_BANK.A51 Mode 4
190
A51 MACRO ASSEMBLER STARTUP 05/07/2008 14:24:39 PAGE 4
195 ;</h>
0009 020000 F 196 LJMP ?C_START
197
000C A80A 198 mov r0,0ah
199
000E D290 200 send: setb 90h
0010 00 201 nop
0011 00 202 nop
0012 00 203 nop
0013 00 204 nop
0014 00 205 nop
0015 00 206 nop
0016 00 207 nop
0017 00 208 nop
0018 C290 209 clr 90h
001A D8F2 210 djnz r0,send
001C 22 211 RET
212
213 END
A51 MACRO ASSEMBLER STARTUP 05/07/2008 14:24:39 PAGE 5
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
?C_C51STARTUP. . . C SEG 001DH REL=UNIT
?C_START . . . . . C ADDR ----- EXT
?C_STARTUP . . . . C ADDR 0000H A
?STACK . . . . . . I SEG 0001H REL=UNIT
ACC. . . . . . . . D ADDR 00E0H A
B. . . . . . . . . D ADDR 00F0H A
DPH. . . . . . . . D ADDR 0083H A
DPL. . . . . . . . D ADDR 0082H A
IBPSTACK . . . . . N NUMB 0000H A
IBPSTACKTOP. . . . N NUMB 0100H A
IDATALEN . . . . . N NUMB 0080H A
IDATALOOP. . . . . C ADDR 0003H R SEG=?C_C51STARTUP
PBPSTACK . . . . . N NUMB 0000H A
PBPSTACKTOP. . . . N NUMB 0100H A
PDATALEN . . . . . N NUMB 0000H A
PDATASTART . . . . N NUMB 0000H A
PPAGE. . . . . . . N NUMB 0000H A
PPAGEENABLE. . . . N NUMB 0000H A
PPAGE_SFR. . . . . D ADDR 00A0H A
SEND . . . . . . . C ADDR 000EH R SEG=?C_C51STARTUP
SP . . . . . . . . D ADDR 0081H A
STARTUP1 . . . . . C ADDR 0000H R SEG=?C_C51STARTUP
XBPSTACK . . . . . N NUMB 0000H A
XBPSTACKTOP. . . . N NUMB 0000H A
XDATALEN . . . . . N NUMB 0000H A
XDATASTART . . . . N NUMB 0000H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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