; read input digits into R1 and R2, compute sum and output to display
	.ORIG x3000
	AND R1, R1, #0	;initialize R1 to zero
	AND R2, R2, #0	; initialize R2 to zero
	LD R4, save	; load memory location into R4
	STR R1, R4, #0	;
	LD R3, Neg	; load negative x30 into R3
	IN		; read input number into R0
	ADD R1, R3, R0	; store first number in R1 after conversion from ASCI
	IN		; read second number
	ADD R2, R3, R0	; store second number into R2
	ADD R0, R2, R1	; add the two numbers and store into R0
	LD R3, ASCII	; move x30 into R3
	ADD R0, R0, R3	; add x30 to result in R0 to convert to ASCII
	OUT		; print sum onto display
	HALT
Neg	.FILL xFFD0	; negative x30 or decimal -48
ASCII	.FILL x30	; add x30
save	.FILL x23	; location in memory
	.END