s13-1.asm

手把手教你学单片机（第2版）实验程序

	ORG 0000H
	LJMP MAIN
	ORG 001BH
	LJMP INSER
	ORG 030H
MAIN:	MOV TMOD,#00H
	MOV TH1,#0F0H
	MOV TL1,#0CH
	SETB EA
	SETB ET1
LOOP:	SETB TR1
HERE:	SJMP HERE
	ORG 0200H
INSER :	MOV TH1,#0F0H
	MOV TL1,#0CH
	CPL P1.7 
	RETI
	END