RD	BIT P2.5	
	WR	BIT P2.6	
	INTR	BIT P2.7	
	MYDATA	EQU P1	
	MOV	P1,#0FFH	
	SETB	INTR
BACK:	CLR	WR	
	SETB	WR	
HERE:	JB	INTR,HERE	
	CLR	RD	
	MOV	A,MYDATA	
	ACALL	CONVERSION	
	ACALL	DATA_DISPLAY	
	SETB	RD	
	SJMP	BACK