ORG	$8000		
	BSET	 DDRB,%11111111	
	LDX	 #MYDATA	
B3	LDAA	 1,X+		
	BEQ	 OVER		
	STAA	 PORTB	
	BRA 	 B3		
OVER	BRA	 OVER
	ORG	$8500		
MYDATA DC.B	"USA",0 	 
	END