;This program adds four words of data and saves the result
TITLE     	PROG2-2  (EXE)  PURPOSE: ADDS 4 WORDS OF DATA
PAGE 	60,132
		.MODEL SMALL
		.STACK 64
;--------------
		.DATA
DATA_IN   	DW     	234DH,1DE6H,3BC7H,566AH
             	ORG  	10H
SUM       	DW     	?
;--------------
                .CODE
MAIN      	PROC  	FAR
		MOV  	AX,@DATA
             	MOV  	DS,AX
                MOV     CX,04                   ;set up loop counter CX=4
             	MOV  	DI,OFFSET DATA_IN   	;set up data pointer DI
                MOV     BX,00                   ;initialize BX
ADD_LP:         ADD     BX,[DI]       ;add contents pointed at by [DI] to BX
                INC     DI                      ;increment DI twice 
             	INC  	DI             		;to point to next word
                DEC     CX                      ;decrement loop counter
                JNZ     ADD_LP                  ;jump if loop counter not zero
             	MOV  	SI,OFFSET SUM   	;load pointer for sum    
                MOV     [SI],BX                 ;store in data segment
                MOV     AH,4CH                  ;set up return
                INT     21H                     ;return to DOS
MAIN      	ENDP
            	END 	MAIN