汇编语言hello world

DOS下：

;栈段
stack         segment stack
              db 100 dup(?)
              
stack         ends
;数据段
data          segment
szHello       db 'Hello,world',0dh,0ah,'$'
data          ends
;代码段
code          segment
              assume cs:code,ds:data,ss:stack
start:
              mov ax,data
              mov ds,ax

              mov ah,9
              mov dx,offset szHello
              int 21h

              mov ah,4ch
              int 21h
code          ends
              end  start

win32汇编：

.386
.model flat,stdcall
option casemap:none
;include文件
include     windows.inc
include     user32.inc
includelib  user32.lib
include     kernel32.inc
includelib  kernel32.lib
;数据段
.data
szCaption  db 'MessageBox!',0
szText       db 'Hello,World!',0
;代码段
.code
start:
invoke  MessageBox,NULL,\
           offset szText,\
           offset szCaption,\
           MB_OK
invoke  ExitProcess,NULL
end start