call指令和ret指令(1001)

本文为《汇编语言程序设计》1001小节例程。点击链接…进课程主页。

用ret返回

assume cs:codesg, ss:stack
stack segment
       db 16 dup (0)
stack ends
codesg segment
       mov ax,4c00h
       int 21h
start: mov ax,stack
       mov ss,ax
       mov sp,16
       mov ax,0
       push ax
       mov bx,0
       ret
codesg ends
end start

用retf返回

assume cs:codesg, ss:stack
stack segment
       db 16 dup (0)
stack ends
codesg segment
       mov ax,4c00h
       int 21h
start: mov ax,stack
       mov ss,ax
       mov sp,16
       mov ax,0
       push cs
       push ax
       mov bx,0
       retf
codesg ends
end start