b3-3.asm

汇编语言的设计

	ORG	0000H
	LJMP	MAIN
	ORG	1000H
MAIN:   MOV 	R4,#78H
        MOV 	R5,#46H
        MOV 	R6,#39H
        MOV 	R7,#64H
        ACALL 	L1
L2:     SJMP 	L2
        NOP
L1:     CLR 	A
        MOV 	R2,A
        MOV 	R3,A
        MOV 	R1,#10H
L5:     CLR 	C
        MOV 	A,R5
        RLC 	A
        MOV 	R5,A
        MOV 	A,R4
        RLC 	A
        MOV 	R4,A
        MOV 	A,R3
        RLC 	A
        MOV 	R3,A
        MOV 	A,R2
        RLC 	A
        MOV 	R2,A
        CLR 	C
        SUBB	A,R6
        JC 	L3
        PUSH 	0E0H
        MOV 	A,R3
        SUBB 	A,R7
        JNC 	L4
        MOV 	0F0H,A
        POP 	0E0H
        SUBB 	A,#00H
        JC 	L3
        MOV 	R2,A
        MOV 	R3,0F0H
        INC 	R5
        SJMP 	L3
L4:     MOV 	R3,A
        POP 	0E0H
        MOV 	R2,A
        INC 	R5
 L3:    DJNZ 	R1,L5
        RET
        END