📄 startup.lst
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A51 MACRO ASSEMBLER STARTUP 07/10/2002 15:17:31 PAGE 1
MACRO ASSEMBLER A51 V6.20
OBJECT MODULE PLACED IN ..\obj\startup.obj
ASSEMBLER INVOKED BY: C:\KEIL\C51\BIN\A51.EXE ..\src\system\startup.a51 SET(SMALL) DEBUG PRINT(.\startup.lst) OBJECT(..\
obj\startup.obj) EP
LOC OBJ LINE SOURCE
1 ;------------------------------------------------------------------------------
2 ; This file is part of the C51 Compiler package
3 ; Copyright (c) 1988-1999 Keil Elektronik GmbH and Keil Software, Inc.
4 ;------------------------------------------------------------------------------
5 ; STARTUP.A51: This code is executed after processor reset.
6 ;
7 ; To translate this file use A51 with the following invocation:
8 ;
9 ; A51 STARTUP.A51
10 ;
11 ; To link the modified STARTUP.OBJ file to your application use the following
12 ; BL51 invocation:
13 ;
14 ; BL51 <your object file list>, STARTUP.OBJ <controls>
15 ;
16 ;------------------------------------------------------------------------------
17 ;
18 ; User-defined Power-On Initialization of Memory
19 ;
20 ; With the following EQU statements the initialization of memory
21 ; at processor reset can be defined:
22 ;
23 ; ; the absolute start-address of IDATA memory is always 0
0100 24 IDATALEN EQU 100H ; the length of IDATA memory in bytes.
25 ;
0000 26 XDATASTART EQU 0H ; the absolute start-address of XDATA memory
0800 27 XDATALEN EQU 800H ; the length of XDATA memory in bytes.
28 ;
0000 29 PDATASTART EQU 0H ; the absolute start-address of PDATA memory
0200 30 PDATALEN EQU 200H ; the length of PDATA memory in bytes.
31 ;
32 ; Notes: The IDATA space overlaps physically the DATA and BIT areas of the
33 ; 8051 CPU. At minimum the memory space occupied from the C51
34 ; run-time routines must be set to zero.
35 ;------------------------------------------------------------------------------
36 ;
37 ; Reentrant Stack Initilization
38 ;
39 ; The following EQU statements define the stack pointer for reentrant
40 ; functions and initialized it:
41 ;
42 ; Stack Space for reentrant functions in the SMALL model.
0000 43 IBPSTACK EQU 0 ; set to 1 if small reentrant is used.
0100 44 IBPSTACKTOP EQU 0FFH+1 ; set top of stack to highest location+1.
45 ;
46 ; Stack Space for reentrant functions in the LARGE model.
0000 47 XBPSTACK EQU 0 ; set to 1 if large reentrant is used.
0000 48 XBPSTACKTOP EQU 0FFFFH+1; set top of stack to highest location+1.
49 ;
50 ; Stack Space for reentrant functions in the COMPACT model.
0000 51 PBPSTACK EQU 0 ; set to 1 if compact reentrant is used.
0000 52 PBPSTACKTOP EQU 0FFFFH+1; set top of stack to highest location+1.
53 ;
54 ;------------------------------------------------------------------------------
55 ;
56 ; Page Definition for Using the Compact Model with 64 KByte xdata RAM
57 ;
A51 MACRO ASSEMBLER STARTUP 07/10/2002 15:17:31 PAGE 2
58 ; The following EQU statements define the xdata page used for pdata
59 ; variables. The EQU PPAGE must conform with the PPAGE control used
60 ; in the linker invocation.
61 ;
0001 62 PPAGEENABLE EQU 1 ; set to 1 if pdata object are used.
0000 63 PPAGE EQU 0 ; define PPAGE number.
64 ;
65 ;------------------------------------------------------------------------------
66
67 NAME ?C_STARTUP
68
69
70 ?C_C51STARTUP SEGMENT CODE
71 ?STACK SEGMENT IDATA
72
---- 73 RSEG ?STACK
0000 74 DS 1
75
76 EXTRN CODE (?C_START)
77 PUBLIC ?C_STARTUP
78
---- 79 CSEG AT 0
0000 80 ?C_STARTUP:
0000 020000 F 81 LJMP STARTUP1
82
---- 83 RSEG ?C_C51STARTUP
84
0000 85 STARTUP1:
86
87 IF IDATALEN <> 0
0000 78FF 88 MOV R0,#IDATALEN - 1
0002 E4 89 CLR A
0003 90 IDATALOOP:
0003 F6 91 MOV @R0,A
0004 D8FD 92 DJNZ R0,IDATALOOP
93 ENDIF
94
95 IF XDATALEN <> 0
0006 900000 96 MOV DPTR,#XDATASTART
0009 7F00 97 MOV R7,#LOW (XDATALEN)
98 IF (LOW (XDATALEN)) <> 0
MOV R6,#(HIGH XDATALEN) +1
ELSE
000B 7E08 101 MOV R6,#HIGH (XDATALEN)
102 ENDIF
000D E4 103 CLR A
000E 104 XDATALOOP:
000E F0 105 MOVX @DPTR,A
000F A3 106 INC DPTR
0010 DFFC 107 DJNZ R7,XDATALOOP
0012 DEFA 108 DJNZ R6,XDATALOOP
109 ENDIF
110
111 IF PPAGEENABLE <> 0
112 ; MOV P2,#PPAGE
113 ENDIF
114
115 IF PDATALEN <> 0
0014 7800 116 MOV R0,#PDATASTART
0016 7F00 117 MOV R7,#LOW (PDATALEN)
0018 E4 118 CLR A
0019 119 PDATALOOP:
0019 F2 120 MOVX @R0,A
001A 08 121 INC R0
001B DFFC 122 DJNZ R7,PDATALOOP
123 ENDIF
A51 MACRO ASSEMBLER STARTUP 07/10/2002 15:17:31 PAGE 3
124
125 IF IBPSTACK <> 0
EXTRN DATA (?C_IBP)
MOV ?C_IBP,#LOW IBPSTACKTOP
ENDIF
130
131 IF XBPSTACK <> 0
EXTRN DATA (?C_XBP)
MOV ?C_XBP,#HIGH XBPSTACKTOP
MOV ?C_XBP+1,#LOW XBPSTACKTOP
ENDIF
137
138 IF PBPSTACK <> 0
EXTRN DATA (?C_PBP)
MOV ?C_PBP,#LOW PBPSTACKTOP
ENDIF
142
001D 758100 F 143 MOV SP,#?STACK-1
0020 020000 F 144 LJMP ?C_START
145
146 END
A51 MACRO ASSEMBLER STARTUP 07/10/2002 15:17:31 PAGE 4
SYMBOL TABLE LISTING
------ ----- -------
N A M E T Y P E V A L U E ATTRIBUTES
?C_C51STARTUP. . . C SEG 0023H REL=UNIT
?C_START . . . . . C ADDR ----- EXT
?C_STARTUP . . . . C ADDR 0000H A
?STACK . . . . . . I SEG 0001H REL=UNIT
IBPSTACK . . . . . N NUMB 0000H A
IBPSTACKTOP. . . . N NUMB 0100H A
IDATALEN . . . . . N NUMB 0100H A
IDATALOOP. . . . . C ADDR 0003H R SEG=?C_C51STARTUP
PBPSTACK . . . . . N NUMB 0000H A
PBPSTACKTOP. . . . N NUMB 0000H A
PDATALEN . . . . . N NUMB 0200H A
PDATALOOP. . . . . C ADDR 0019H R SEG=?C_C51STARTUP
PDATASTART . . . . N NUMB 0000H A
PPAGE. . . . . . . N NUMB 0000H A
PPAGEENABLE. . . . N NUMB 0001H A
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 0800H 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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