b9-3.asm

汇编语言的设计

	ORG	0000H
	LJMP	MAIN
	ORG 	1000H
MAIN:   MOV 	DPTR,#7FFFH
        CLR 	A
L2:     MOVX 	@DPTR,A
        ADD 	A,#10H
        ACALL 	L1
        SJMP 	L2
L1:     PUSH 	0E0H
        PUSH 	0F0H
        MOV 	A,#02H
L4:     MOV 	0F0H,#0FAH
L3:     DJNZ 	0F0H,L3
        DEC 	A
        JNZ 	L4
        POP 	0F0H
        POP 	0E0H
        RET
        END