TEMP	DC.B	1
COUNT	DC.B	1
Entry:LDS	#RAMEnd+1    	
	BSET	CRGINT,%10000000	
	LDAA	#%01111111		
	STAA 	RTICTL		
	CLR	TEMP			
	CLR 	COUNT     		
	BSET	DDRB,%00010000	
	CLI				
HERE	BRA	HERE			
RTI_ISR
  	INC	COUNT			
  	LDAA	COUNT			
  	CMPA	#8			
  	BNE	OVER			
	LDAA	TEMP           	
	EORA	#%00010000		
	STAA	TEMP			
	STAA	PORTB         	
	CLR	COUNT
OVER	BSET	CRGFLG,%10000000	
	RTI				
   	ORG 	$FFF0
    	DC.W 	RTI_ISR		
    	ORG	$FFFE
    	DC.W	Entry