CS	BIT P2.4 
	RD	BIT P2.5
	WR	BIT P2.6
	INTR	BIT P2.7 
	ORG	0H
	SETB	INTR		
	SETB	CS			
	SETB	RD			
	SETB	WR			
BACK:
	MOV	P1,#0AH		
	NOP				
	CLR	CS			
	CLR	WR			
	NOP      		
	NOP				
	SETB	WR			
	SETB	CS			
	MOV	P1,#0FFH		
HERE:
	JB	INTR,HERE		
	CLR	CS  		
	CLR	RD    		
	NOP    			
	NOP
	SETB	RD			
	MOV	A,P1  		
	SETB	CS			
	ACALL	CONVERT 		
	ACALL	DATA_DISPLAY	
	SJMP	BACK