BSF 	TRISA,RA4		
	CLRF	TRISB			
	CLRF	TRISD			
	MOVLW	0x28			
	MOVWF	T0CON			
HERE	MOVLW	0x0			
	MOVWF	TMR0H			
	MOVLW	0x0			
	MOVWF	TMR0L			
	BCF	INTCON,TMR0IF	
	BSF	T0CON,TMR0ON	
AGAIN	MOVFF	TMR0H,PORTD		
	MOVFF	TMR0L,PORTB		
	BTFSS	INTCON,TMR0IF	
	BRA	AGAIN			
	BCF 	T0CON,TMR0ON 	
	GOTO	HERE