b6-1.asm

来自「汇编语言的设计」· 汇编 代码 · 共 45 行

	ORG	0000H
	LJMP	MAIN
	ORG 	001BH
	CPL 	P1.0
	RETI
	ORG 	1000H
MAIN:	MOV 	R1,#00
	MOV 	R0,#23H
	MOV 	TMOD,#20H
	MOV 	IE,#88H
L1:	MOV 	DPTR,#3FFFH
	MOV 	A,R0
	INC 	R0
	MOVC 	A,@A+PC
	JZ 	MAIN
	MOV 	R2,A
	MOV 	A,#0FFH
	CLR 	C
	SUBB 	A,R2
	RL 	A
	MOV 	TH1,A
	SETB 	TR1
L2:	CLR 	C
	MOV 	A,DPL
	SUBB 	A,#01
	MOV 	DPL,A
	MOV 	A,DPH
	SUBB 	A,#00
	MOV 	DPH,A
	ORL 	A,DPL
	JNZ 	L2
	CLR 	TR1
	SJMP 	L1
	DB 33H, 33H, 3DH, 33H, 26H, 26H, 26H, 26H, 2DH, 2DH, 26H, 2DH, 33H
	DB 33H, 33H, 33H, 33H, 33H, 4DH, 45H, 3DH, 3DH, 3DH, 45H, 4DH, 45H
	DB 45H, 45H, 45H, 45H, 45H, 45H, 45H, 33H, 33H, 3DH, 33H, 26H, 26H
	DB 26H, 28H, 2DH, 2DH, 26H, 26H, 33H, 33H, 33H, 33H, 45H, 3DH, 39H
        DB 39H, 39H, 52H, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 2DH, 2DH
	DB 26H, 26H, 26H, 26H, 26H, 26H, 28H, 28H, 2DH, 28H, 26H, 26H, 26H
	DB 26H, 2DH, 28H, 26H, 2DH, 2DH, 33H, 3DH, 4DH, 45H, 45H, 45H, 45H
	DB 45H, 45H, 45H, 45H, 33H, 33H, 3DH, 33H, 26H, 26H, 26H, 28H, 2DH
	DB 2DH, 26H, 2DH, 33H, 33H, 33H, 33H, 33H, 33H, 45H, 3DH, 39H, 39H
	DB 39H, 52H, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 4DH, 00H, 00H
	END