t1.asm

masm,debug,link还有上课时的源程序

data segment para

data ends

 t
   ;Begin
     mov ax,data
       mov ds,ax
         ;Add your code here
         stack segment para stack 'stack'
        db 64 dup(?)
stack ends

code segment  public
        assume cs:code, ds:data,ss:stack,es:data
start:
        ;Begin
        mov ax,data
        mov ds,ax
        ;Add your code here

        mov ax,20h
        shl ax,1
        mov bx,ax
        shl ax,1
        add ax,bx

        ;Exit to DOS
        mov ah,4ch
        int 21h

code ends
        end start