ddrr.asm

汇编语言程序

code segment
   assume cs:code ,ds:code
  org 100h
xfcb db 50h dup(0)
dta db 33h dup(0)
        db '$'
start:mov ax,0
      push ax
      mov ax,code
       mov ds,ax
      push ds
      pop es
       mov di ,offset xfcb
       mov ax,0ffh
       stosb
       xor ax,ax
       stosw
       stosw
       stosb
       mov al,10h
        stosb
        inc di
        mov cx,0bh
        mov al,'?'
        rep stosb
        mov dx,offset dta
         mov ah,1ah
         int 21h
         mov dx,offset xfcb
          mov ah,11h
          int 21h
   lop:  mov dx,offset dta
          mov ax,dx
          add ax,14h
          mov di,ax
          add dx,8
          mov al,24h
          stosb
          mov ax,0900h
          int 21h
          mov dl,0dh
          mov ah,2
          int 21h
          mov dl,0ah
          mov ah,2
          int 21h
          mov dx,offset xfcb
          mov ax,1200h
          int 21h
          cmp al,00
          jz lop
          mov ah,01h
          int 21h
          mov ax,4c00h
          int 21h
          code ends
          end start