<code>
*-----------------------------------------------------------
* Program    : Simple Addition
* Written by : Jacob Pettie
* Description: Simple Addition using User Input
*-----------------------------------------------------------
	ORG	$1000
START:				; first instruction of program

	LEA	BEGIN,A1
	MOVE.B	#13,D0
	TRAP	#15
	
	LEA	INPUT,A1
	MOVE.B	#14,D0
	TRAP	#15
	
	MOVE.B	#4,D0
	TRAP	#15
	
	MOVE.B	D1,D2
	CLR.B	D1
	
	MOVE.B	#14,D0
	TRAP	#15
	
	MOVE.B	#4,D0
	TRAP	#15
	
	ADD.B	D2,D1
	
	LEA	ANSWER,A1
	MOVE.B	#14,D0
	TRAP	#15
	
	CLR.B	D2
	
	MOVE.B	#20,D0
	TRAP	#15

	MOVE.B	#9,D0
	TRAP	#15		; halt simulator

* Variables and Strings
BEGIN	DC.B	'Add Two Numbers!',0
INPUT	DC.B	'Input a Number: ',0
ANSWER	DC.B	'The Answer is: ',0

	END	START		; last line of source
</code>

{{http://i47.tinypic.com/vp9bmd.png}}