TITLE ADD TWO 8-BYTE NUMBERS USING 32-BIT REGISTERS IN THE 386
  PAGE 60,132 
  .MODEL SMALL
  .386
  .STACK 200H
  .DATA
  DATA1 DQ 548FB9963CE7H
  ORG 0010H
  DATA2 DQ 3FCD4FA23B8DH
  ORG 0020H
  DATA3 DQ ?
  .CODE
BEGIN:MOV AX,@DATA
  MOV DS,AX
  MOV EAX,DWORD PTR DATA1 
  ADD EAX,DWORD PTR DATA2 
  MOV EBX,DWORD PTR DATA1+4 
  ADC EBX,DWORD PTR DATA2+4 
  MOV DWORD PTR DATA3,EAX 
  MOV DWORD PTR DATA3+4,EBX 
  MOV AH,4CH
  INT 21H
  END BEGIN