.code
CAT	START	0
LOOP	TD	dev
	JEQ	LOOP
	RD	dev
	COMP	#0
	JEQ	EXIT
	WD	#1
	J	LOOP
EXIT	LDA	#10
	WD	#1
HALT	J	HALT
.data
dev	BYTE	0xAA
	END	CAT