jmp指令(0903)

jmp指令：依据位移进行转移

程序1：

assume cs:codesg
codesg segment
  start: mov ax,0
         jmp short s
         add ax,1
      s: inc ax
codesg ends
end start

程序2：

assume cs:codesg
codesg segment
  start: mov ax,0
         jmp short s
         add ax,1
         nop
         nop
      s: inc ax
codesg ends
end start

远转移：jmp far ptr 标号

assume cs:codesg
codesg segment
start: mov ax,0
       mov bx,0
       jmp far ptr s
       db 256 dup (0)
    s: add ax,1
       inc ax
codesg ends
end start

近转移：jmp near ptr 标号

assume cs:codesg
codesg segment
start: mov ax,0
       mov bx,0
       jmp near ptr s
       db 256 dup (0)
    s: add ax,1
       inc ax
codesg ends
end start

转移地址在寄存器中的jmp指令

assume cs:codesg
codesg segment
start: mov ax,0
       mov bx,ax
       jmp bx
       mov ax,0123H
codesg ends
end start