$NOMOD51 NAME ?C_STARTUP EXTRN CODE (?C_START) PUBLIC ?C_STARTUP IDATALEN EQU 100H CLKCON EQU 0B2H SSP_LEN EQU 0x1000 //偏移到4K的起始位置 ISEG AT 0x80 STACK: DS 128 CSEG AT 0 ?C_STARTUP: LJMP STARTUP1 ?C_C51STARTUP SEGMENT CODE RSEG ?C_C51STARTUP STARTUP1: MOV SP, #STACK-1 MOV CLKCON, #08H ;SETB HFON NOP NOP NOP NOP NOP NOP NOP NOP ORL CLKCON, #04H ;SETB FS, SYSCLK=24M IF IDATALEN <> 0 MOV R0,#IDATALEN - 1 CLR A IDATALOOP: MOV @R0,A DJNZ R0,IDATALOOP ENDIF LJMP ?C_START CSEG AT 00003H LJMP SSP_LEN+00003H CSEG AT 0000BH LJMP SSP_LEN+0000BH CSEG AT 00013H LJMP SSP_LEN+00013H CSEG AT 0001BH LJMP SSP_LEN+0001BH CSEG AT 00023H LJMP SSP_LEN+00023H CSEG AT 0002BH LJMP SSP_LEN+0002BH CSEG AT 00033H LJMP SSP_LEN+00033H CSEG AT 0003BH LJMP SSP_LEN+0003BH CSEG AT 00043H LJMP SSP_LEN+00043H CSEG AT 0004BH LJMP SSP_LEN+0004BH CSEG AT 00053H LJMP SSP_LEN+00053H CSEG AT 0005BH LJMP SSP_LEN+0005BH CSEG AT 00063H LJMP SSP_LEN+00063H CSEG AT 0006BH LJMP SSP_LEN+0006BH CSEG AT 00073H LJMP SSP_LEN+00073H CSEG AT 0007BH LJMP SSP_LEN+0007BH CSEG AT 00083H LJMP SSP_LEN+00083H CSEG AT 0008BH LJMP SSP_LEN+0008BH CSEG AT 00093H LJMP SSP_LEN+00093H CSEG AT 0009BH LJMP SSP_LEN+0009BH CSEG AT 000A3H LJMP SSP_LEN+000A3H CSEG AT (1000H-200H) FlagCode: DS 512 END