5.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 0404H
     W2 dw 0307H
     B3 db ?
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
      sub al,byte ptr W2
      mov ah,0
      aas
      mov B3,al
      mov bh,ah ;jiewei

      mov al,byte ptr W1 + 1
      sub al,byte ptr W2 + 1
      add al,bh
      mov cl,4
      shl al,cl
      add al,B3
      mov B3,al
      





      ret
begin   endp
code    ends
      end begin