porta	equ	$1000

	org	$2000
start	lds	#$01ff
again	ldaa	$1000		read switches PA0 and PA1
	anda	%00000011	clear all other PA signals
	lsla			shift 5x so PA5=PA0 and PA6=PA1
	lsla			
	lsla
	lsla
	lsla
	staa	$1000		write LEDs
	bra	again