l4(30).asm

这是个 MASM 的 编译环境

Data  segment
Array   db   40  dup ('a')
Data ends
Edata  segment
  Array2  db  40  dup(?)
Edata  ends
Code segment
Main proc far
  Assume   cs:code ,ds:data ,es:edata
Start:
      Push  ds
Sub  ax,ax
Push  ax
Mov  ax,data
Mov ds,ax
Mov  ax,edata
Mov es,ax
Lea   si,array
Lea   di,array2
Cld
Mov  cx,40
Rep  movsb
Ret
Main  endp
Code  ends
End  start