?? startup.lst
字號:
A51 MACRO ASSEMBLER STARTUP 03/02/2007 11:12:44 PAGE 1
MACRO ASSEMBLER A51 V8.00b
OBJECT MODULE PLACED IN .\STARTUP.obj
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE ..\uc_51\STARTUP.asm SET(SMALL) DEBUG PRINT(.\STARTUP.lst) OBJECT(.\STARTU
P.obj) EP
LOC OBJ LINE SOURCE
1 $nomod51
2 ;------------------------------------------------------------------------------
3 ; This file is part of the C51 Compiler package
4 ; Copyright (c) 1988-2001 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
00FF 25 IDATALEN EQU 0FFH ; the length of IDATA memory in bytes.
26 ;
0000 27 XDATASTART EQU 0H ; the absolute start-address of XDATA memory
02FF 28 XDATALEN EQU 2ffH ; 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.
0001 44 IBPSTACK EQU 1 ; 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.
0000 48 XBPSTACK EQU 0 ; 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.
8000 53 PBPSTACKTOP EQU 7FFFH+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 03/02/2007 11:12:44 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.
0000 64 PPAGE EQU 0 ; define PPAGE number.
65 ;
66 ;------------------------------------------------------------------------------
67
68 ; Standard SFR Symbols required in XBANKING.A51
00E0 69 ACC DATA 0E0H
00F0 70 B DATA 0F0H
0081 71 SP DATA 81H
0082 72 DPL DATA 82H
0083 73 DPH DATA 83H
74
75 NAME ?C_STARTUP
76
77
78 ?C_C51STARTUP SEGMENT CODE
79 ?STACK SEGMENT IDATA
80
---- 81 RSEG ?STACK
0000 82 DS 1
83
84 EXTRN CODE (?C_START)
85 PUBLIC ?C_STARTUP
86
---- 87 CSEG AT 0
0000 020000 F 88 ?C_STARTUP: LJMP STARTUP1
89
---- 90 RSEG ?C_C51STARTUP
91
0000 92 STARTUP1:
93
94 IF IDATALEN <> 0
0000 78FE 95 MOV R0,#IDATALEN - 1
0002 E4 96 CLR A
0003 F6 97 IDATALOOP: MOV @R0,A
0004 D8FD 98 DJNZ R0,IDATALOOP
99 ENDIF
100
101 IF XDATALEN <> 0
0006 900000 102 MOV DPTR,#XDATASTART
0009 7FFF 103 MOV R7,#LOW (XDATALEN)
104 IF (LOW (XDATALEN)) <> 0
000B 7E03 105 MOV R6,#(HIGH (XDATALEN)) +1
106 ELSE
MOV R6,#HIGH (XDATALEN)
ENDIF
000D E4 109 CLR A
000E F0 110 XDATALOOP: MOVX @DPTR,A
000F A3 111 INC DPTR
0010 DFFC 112 DJNZ R7,XDATALOOP
0012 DEFA 113 DJNZ R6,XDATALOOP
114 ENDIF
115
116 IF PPAGEENABLE <> 0
MOV P2,#PPAGE
ENDIF
119
120 IF PDATALEN <> 0
MOV R0,#PDATASTART
MOV R7,#LOW (PDATALEN)
CLR A
A51 MACRO ASSEMBLER STARTUP 03/02/2007 11:12:44 PAGE 3
PDATALOOP: MOVX @R0,A
INC R0
DJNZ R7,PDATALOOP
ENDIF
128
129 IF IBPSTACK <> 0
130 EXTRN DATA (?C_IBP)
131
0014 750000 F 132 MOV ?C_IBP,#LOW IBPSTACKTOP
133 ENDIF
134
135 IF XBPSTACK <> 0
EXTRN DATA (?C_XBP)
MOV ?C_XBP,#HIGH XBPSTACKTOP
MOV ?C_XBP+1,#LOW XBPSTACKTOP
ENDIF
141
142 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
146
0017 758100 F 147 MOV SP,#?STACK-1
148 ; This code is required if you use L51_BANK.A51 with Banking Mode 4
149 ; EXTRN CODE (?B_SWITCH0)
150 ; CALL ?B_SWITCH0 ; init bank mechanism to code bank 0
001A 020000 F 151 LJMP ?C_START
152
153 END
A51 MACRO ASSEMBLER STARTUP 03/02/2007 11:12:44 PAGE 4
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_IBP . . . . . . D ADDR ----- EXT
?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 0001H A
IBPSTACKTOP. . . . N NUMB 0100H A
IDATALEN . . . . . N NUMB 00FFH A
IDATALOOP. . . . . C ADDR 0003H R SEG=?C_C51STARTUP
PBPSTACK . . . . . N NUMB 0000H A
PBPSTACKTOP. . . . N NUMB 8000H A
PDATALEN . . . . . N NUMB 0000H A
PDATASTART . . . . N NUMB 0000H A
PPAGE. . . . . . . N NUMB 0000H A
PPAGEENABLE. . . . N NUMB 0000H A
SP . . . . . . . . D ADDR 0081H A
STARTUP1 . . . . . C ADDR 0000H R SEG=?C_C51STARTUP
XBPSTACK . . . . . N NUMB 0000H A
XBPSTACKTOP. . . . N NUMB 8000H A
XDATALEN . . . . . N NUMB 02FFH 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)
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -