ORG	0000H
	GOTO	MAIN	
	ORG	0008H		
	BTFSS INTCON,RBIF
	RETFIE		
	GOTO  PB_ISR	
	ORG	0100H	
MAIN	BCF TRISC,4	
	BCF TRISC,5	
	BSF TRISB,4 
	BSF TRISB,5 
	BSF INTCON,RBIE	
	BSF INTCON,GIE	
OVER	BRA OVER		
PB_ISR
	ORG 200H
	MOVFF PORTB,W 
	ANDLW 0x30 
	MOVFF W,PORTC 
	BCF INTCON,RBIF 
	RETFIE
	END