TITLE PROG3-2 (EXE) MULTIWORD ADDITION
  PAGE 60,132
  .MODEL SMALL
  .STACK 64
  .DATA
  DATA1 DQ 548FB9963CE7H
  ORG 0010H
  DATA2 DQ 3FCD4FA23B8DH
  ORG 0020H
  DATA3 DQ ?
  .CODE
  MAIN PROC FAR
  MOV AX,@DATA
  MOV DS,AX
  CLC 
  MOV SI,OFFSET DATA1 
  MOV DI,OFFSET DATA2 
  MOV BX,OFFSET DATA3 
  MOV CX,04 
BACK:MOV AX,[SI] 
  ADC AX,[DI] 
  MOV [BX],AX 
  INC SI 
  INC SI
  INC DI 
  INC DI
  INC BX 
  INC BX
  LOOP BACK 
  MOV AH,4CH
  INT 21H 
  MAIN ENDP
  END MAIN