da2.asm

我学单片机89C51时编的大部分程序都在里面

        ORG 0000H
        AJMP START
        ORG 0030H
START:  MOV P2,#0B0H
        MOV R0,#00H
        MOV R1,#0FFH
        MOV DPTR,#7FFFH
DONE:   MOV A,#00H
        MOVX @DPTR,A
        MOVX A,@DPTR
        MOVX @R0,A
        INC R0
        DJNZ R1,DONE
        MOV R1,#0FFH
        MOV R0,#00H
        
        MOV DPTR,#2FFFH
LOOP:   MOVX A,@R0
        MOVX @DPTR,A
        INC R0
        DJNZ R1,LOOP
        LJMP START