#include "p16f84.inc"	
 __CONF

START
	BSF STATUS,RP1
	MOVLW	B'00011111'	
	MOVWF	TRISA			
	MOVLW	B'00000001'	IG _XT_OSC&_CP_OFF&_WDT_OFF
	MOVWF	TRISB
	BCF STATUS,RP0				
	NOP
	NOP
	NOP
	NOP
	NOP
INDUL	
	BTFSC PORTA,0
	RRF PORTB,1
	BTFSC PORTA,1
	RLF PORTB,1
	GOTO INDUL
VEGE
	END