3_2_2.asm

华工电信系汇编习题的编程实现

stack segment stack 'stack'
      dw 32 dup(?)
stack ends

data segment 
     W1 dw 3040H
     W2 dw 5010H
     W3 dw ?
data ends

code segment 
begin proc far
      assume ss:stack,cs:code,ds:data
      push ds
      sub ax,ax
      push ax
      mov ax,data
      mov ds,ax

      mov al,byte ptr W1   ;ax 1471
      add al,byte ptr W2   ;ax 1440
      daa                  ;ax 1450
      mov byte ptr W3,al   ;ax 1450 
       
      mov al,byte ptr W1 + 1 ;ax 1450       
      add al,byte ptr W2 + 1 ;ax 1430
      daa                    ;ax 1480
      mov byte ptr W3 + 1, al;ax 1480

      ret
                         ;result right
begin   endp
code    ends
      end begin