?? startup.lst
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A51 MACRO ASSEMBLER STARTUP 03/06/2007 22:52:12 PAGE 1
MACRO ASSEMBLER A51 V7.10
OBJECT MODULE PLACED IN .\DeBug\STARTUP.obj
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE STARTUP.A51 SET(LARGE) DEBUG PRINT(.\DeBug\STARTUP.lst) OBJECT(.\DeBug\STA
RTUP.obj) EP
LOC OBJ LINE SOURCE
1 $nomod51
2 ;------------------------------------------------------------------------------
3 ; This file is part of the C51 Compiler package
4 ; Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
5 ;------------------------------------------------------------------------------
6 ; STARTUP.A51: This code is executed after processor reset.
7 ;
8 ; To translate this file use A51 with the following invocation:
9 ;
10 ; A51 STARTUP.A51
11 ;
12 ; To link the modified STARTUP.OBJ file to your application use the following
13 ; BL51 invocation:
14 ;
15 ; BL51 <your object file list>, STARTUP.OBJ <controls>
16 ;
17 ;------------------------------------------------------------------------------
18 ;
19 ; User-defined Power-On Initialization of Memory
20 ;
21 ; With the following EQU statements the initialization of memory
22 ; at processor reset can be defined:
23 ;
24 ; ; the absolute start-address of IDATA memory is always 0
0080 25 IDATALEN EQU 80H ; the length of IDATA memory in bytes.
26 ;
0000 27 XDATASTART EQU 0H ; the absolute start-address of XDATA memory
8000 28 XDATALEN EQU 8000H ; the length of XDATA memory in bytes.
29 ;
0000 30 PDATASTART EQU 0H ; the absolute start-address of PDATA memory
0000 31 PDATALEN EQU 0H ; the length of PDATA memory in bytes.
32 ;
33 ; Notes: The IDATA space overlaps physically the DATA and BIT areas of the
34 ; 8051 CPU. At minimum the memory space occupied from the C51
35 ; run-time routines must be set to zero.
36 ;------------------------------------------------------------------------------
37 ;
38 ; Reentrant Stack Initilization
39 ;
40 ; The following EQU statements define the stack pointer for reentrant
41 ; functions and initialized it:
42 ;
43 ; Stack Space for reentrant functions in the SMALL model.
0000 44 IBPSTACK EQU 0 ; set to 1 if small reentrant is used.
0100 45 IBPSTACKTOP EQU 0FFH+1 ; set top of stack to highest location+1.
46 ;
47 ; Stack Space for reentrant functions in the LARGE model.
0001 48 XBPSTACK EQU 1 ; set to 1 if large reentrant is used.
8000 49 XBPSTACKTOP EQU 7FFFH+1 ; set top of stack to highest location+1.
50 ;
51 ; Stack Space for reentrant functions in the COMPACT model.
0000 52 PBPSTACK EQU 0 ; set to 1 if compact reentrant is used.
0000 53 PBPSTACKTOP EQU 0FFFFH+1; set top of stack to highest location+1.
54 ;
55 ;------------------------------------------------------------------------------
56 ;
57 ; Page Definition for Using the Compact Model with 64 KByte xdata RAM
A51 MACRO ASSEMBLER STARTUP 03/06/2007 22:52:12 PAGE 2
58 ;
59 ; The following EQU statements define the xdata page used for pdata
60 ; variables. The EQU PPAGE must conform with the PPAGE control used
61 ; in the linker invocation.
62 ;
0000 63 PPAGEENABLE EQU 0 ; set to 1 if pdata object are used.
64 ;
0000 65 PPAGE EQU 0 ; define PPAGE number.
66 ;
00A0 67 PPAGE_SFR DATA 0A0H ; SFR that supplies uppermost address byte
68 ; (most 8051 variants use P2 as uppermost address byte)
69 ;
70 ;------------------------------------------------------------------------------
71
72 ; Standard SFR Symbols
00E0 73 ACC DATA 0E0H
00F0 74 B DATA 0F0H
0081 75 SP DATA 81H
0082 76 DPL DATA 82H
0083 77 DPH DATA 83H
78
79
80 NAME ?C_STARTUP
81
82
83
84
85 ?C_C51STARTUP SEGMENT CODE
86 ?STACK SEGMENT IDATA
87
---- 88 RSEG ?STACK
0000 89 DS 1
90
91 EXTRN CODE (?C_START)
92 PUBLIC ?C_STARTUP
93
---- 94 CSEG AT 0
0000 020000 F 95 ?C_STARTUP: LJMP STARTUP1
96
---- 97 RSEG ?C_C51STARTUP
98
0000 99 STARTUP1:
100
101 ;ORL P4,#02H ;給外部RAM送片選信號
102 ;ANL P4,#0FAH
103
104 IF IDATALEN <> 0
0000 787F 105 MOV R0,#IDATALEN - 1
0002 E4 106 CLR A
0003 F6 107 IDATALOOP: MOV @R0,A
0004 D8FD 108 DJNZ R0,IDATALOOP
109 ENDIF
110
111 IF XDATALEN <> 0
0006 900000 112 MOV DPTR,#XDATASTART
0009 7F00 113 MOV R7,#LOW (XDATALEN)
114 IF (LOW (XDATALEN)) <> 0
MOV R6,#(HIGH (XDATALEN)) +1
ELSE
000B 7E80 117 MOV R6,#HIGH (XDATALEN)
118 ENDIF
000D E4 119 CLR A
000E F0 120 XDATALOOP: MOVX @DPTR,A
000F A3 121 INC DPTR
0010 DFFC 122 DJNZ R7,XDATALOOP
0012 DEFA 123 DJNZ R6,XDATALOOP
A51 MACRO ASSEMBLER STARTUP 03/06/2007 22:52:12 PAGE 3
124 ENDIF
125
126 IF PPAGEENABLE <> 0
MOV PPAGE_SFR,#PPAGE
ENDIF
129
130 IF PDATALEN <> 0
MOV R0,#LOW (PDATASTART)
MOV R7,#LOW (PDATALEN)
CLR A
PDATALOOP: MOVX @R0,A
INC R0
DJNZ R7,PDATALOOP
ENDIF
138
139 IF IBPSTACK <> 0
EXTRN DATA (?C_IBP)
MOV ?C_IBP,#LOW IBPSTACKTOP
ENDIF
144
145 IF XBPSTACK <> 0
146 EXTRN DATA (?C_XBP)
147
0014 750080 F 148 MOV ?C_XBP,#HIGH XBPSTACKTOP
0017 750000 F 149 MOV ?C_XBP+1,#LOW XBPSTACKTOP
150 ENDIF
151
152 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
156
001A 758100 F 157 MOV SP,#?STACK-1
158 ; This code is required if you use L51_BANK.A51 with Banking Mode 4
159 ; EXTRN CODE (?B_SWITCH0)
160 ; CALL ?B_SWITCH0 ; init bank mechanism to code bank 0
001D 020000 F 161 LJMP ?C_START
162
163 END
A51 MACRO ASSEMBLER STARTUP 03/06/2007 22:52:12 PAGE 4
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
?C_C51STARTUP. . . C SEG 0020H REL=UNIT
?C_START . . . . . C ADDR ----- EXT
?C_STARTUP . . . . C ADDR 0000H A
?C_XBP . . . . . . D ADDR ----- EXT
?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 0000H 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
SP . . . . . . . . D ADDR 0081H A
STARTUP1 . . . . . C ADDR 0000H R SEG=?C_C51STARTUP
XBPSTACK . . . . . N NUMB 0001H A
XBPSTACKTOP. . . . N NUMB 8000H A
XDATALEN . . . . . N NUMB 8000H A
XDATALOOP. . . . . C ADDR 000EH R SEG=?C_C51STARTUP
XDATASTART . . . . N NUMB 0000H A
REGISTER BANK(S) USED: 0
ASSEMBLY COMPLETE. 0 WARNING(S), 0 ERROR(S)
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