LDAA 	#$80		
	STAA	TSCR1			
	LDAA 	#$00		
	STAA	TSCR2			
	BSET	TIOS,%00010000	
	LDAA 	#$01			
	STAA	TCTL1			
OVER	LDD	TCNT			
	ADDD	#65535		
	STD	TC4			
HERE	BRCLR	TFLG1,mTFLG1_C4F,HERE	
	BSET	TFLG1,%00010000	
 	BRA	OVER