TITLE Example Prgram
STACK SEGMENT	STACK
	DW 	64 DUP(?)
STACK	ENDS

DATA 	SEGMENT
NUM 	DB	10,25
SUM	DB	?
DATA	ENDS

CODE	SEGMENT
	ASSUME CS:CODE, DS:DATA, SS:STACK
FIRST	PROC
	MOV AX,DATA	; initialize DS
	MOV DS,AX
	MOV AL,NUM	; copy first number into AL
	MOV BL,NUM+1	; copy second number into BL
	ADD AL,BL	; add two numbers
	MOV SUM,AL	; put result in data segment
	MOV AH,4CH	; return to DOS
	INT 21H
FIRST	ENDP
CODE 	ENDS
	END FIRST