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| 5dd1b7 | 1 | $NOMOD51 |
| Q | 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. | |
| 30 | IDATALEN EQU 80H | |
| 31 | ; | |
| 32 | ; <o> XDATASTART: XDATA memory start address <0x0-0xFFFF> | |
| 33 | ; <i> The absolute start address of XDATA memory | |
| 34 | XDATASTART EQU 0 | |
| 35 | ; | |
| 36 | ; <o> XDATALEN: XDATA memory size <0x0-0xFFFF> | |
| 37 | ; <i> The length of XDATA memory in bytes. | |
| 38 | XDATALEN EQU 0 | |
| 39 | ; | |
| 40 | ; <o> PDATASTART: PDATA memory start address <0x0-0xFFFF> | |
| 41 | ; <i> The absolute start address of PDATA memory | |
| 42 | PDATASTART EQU 0H | |
| 43 | ; | |
| 44 | ; <o> PDATALEN: PDATA memory size <0x0-0xFF> | |
| 45 | ; <i> The length of PDATA memory in bytes. | |
| 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. | |
| 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. | |
| 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. | |
| 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. | |
| 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. | |
| 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. | |
| 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 | |
| 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. | |
| 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 | |
| 101 | PPAGE_SFR DATA 0A0H | |
| 102 | ; | |
| 103 | ; </e> | |
| 104 | ;------------------------------------------------------------------------------ | |
| 105 | ||
| 106 | ; Standard SFR Symbols | |
| 107 | ACC DATA 0E0H | |
| 108 | B DATA 0F0H | |
| 109 | SP DATA 81H | |
| 110 | DPL DATA 82H | |
| 111 | DPH DATA 83H | |
| 112 | ||
| 113 | NAME ?C_STARTUP | |
| 114 | ||
| 115 | ||
| 116 | ?C_C51STARTUP SEGMENT CODE | |
| 117 | ?STACK SEGMENT IDATA | |
| 118 | ||
| 119 | RSEG ?STACK | |
| 120 | DS 1 | |
| 121 | ||
| 122 | EXTRN CODE (?C_START) | |
| 123 | PUBLIC ?C_STARTUP | |
| 124 | ||
| 125 | CSEG AT 0 | |
| 126 | ?C_STARTUP: LJMP STARTUP1 | |
| 127 | ||
| 128 | RSEG ?C_C51STARTUP | |
| 129 | ||
| 130 | STARTUP1: | |
| 131 | ||
| 132 | IF IDATALEN <> 0 | |
| 133 | MOV R0,#IDATALEN - 1 | |
| 134 | CLR A | |
| 135 | IDATALOOP: MOV @R0,A | |
| 136 | DJNZ R0,IDATALOOP | |
| 137 | ENDIF | |
| 138 | ||
| 139 | IF XDATALEN <> 0 | |
| 140 | MOV DPTR,#XDATASTART | |
| 141 | MOV R7,#LOW (XDATALEN) | |
| 142 | IF (LOW (XDATALEN)) <> 0 | |
| 143 | MOV R6,#(HIGH (XDATALEN)) +1 | |
| 144 | ELSE | |
| 145 | MOV R6,#HIGH (XDATALEN) | |
| 146 | ENDIF | |
| 147 | CLR A | |
| 148 | XDATALOOP: MOVX @DPTR,A | |
| 149 | INC DPTR | |
| 150 | DJNZ R7,XDATALOOP | |
| 151 | DJNZ R6,XDATALOOP | |
| 152 | ENDIF | |
| 153 | ||
| 154 | IF PPAGEENABLE <> 0 | |
| 155 | MOV PPAGE_SFR,#PPAGE | |
| 156 | ENDIF | |
| 157 | ||
| 158 | IF PDATALEN <> 0 | |
| 159 | MOV R0,#LOW (PDATASTART) | |
| 160 | MOV R7,#LOW (PDATALEN) | |
| 161 | CLR A | |
| 162 | PDATALOOP: MOVX @R0,A | |
| 163 | INC R0 | |
| 164 | DJNZ R7,PDATALOOP | |
| 165 | ENDIF | |
| 166 | ||
| 167 | IF IBPSTACK <> 0 | |
| 168 | EXTRN DATA (?C_IBP) | |
| 169 | ||
| 170 | MOV ?C_IBP,#LOW IBPSTACKTOP | |
| 171 | ENDIF | |
| 172 | ||
| 173 | IF XBPSTACK <> 0 | |
| 174 | EXTRN DATA (?C_XBP) | |
| 175 | ||
| 176 | MOV ?C_XBP,#HIGH XBPSTACKTOP | |
| 177 | MOV ?C_XBP+1,#LOW XBPSTACKTOP | |
| 178 | ENDIF | |
| 179 | ||
| 180 | IF PBPSTACK <> 0 | |
| 181 | EXTRN DATA (?C_PBP) | |
| 182 | MOV ?C_PBP,#LOW PBPSTACKTOP | |
| 183 | ENDIF | |
| 184 | ||
| 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 | #if 0 | |
| 191 | ; <i> Initialize bank mechanism to code bank 0 when using L51_BANK.A51 with Banking Mode 4. | |
| 192 | EXTRN CODE (?B_SWITCH0) | |
| 193 | CALL ?B_SWITCH0 ; init bank mechanism to code bank 0 | |
| 194 | #endif | |
| 195 | ;</h> | |
| 196 | LJMP ?C_START | |
| 197 | ||
| 198 | END | |
