打印机的复位

Author: 上海庄炯 Date: 1994-09-02

        程序清单：
        LPT1 equ 0008h
        code segment
        assume cs:code,ds:code
        org 100h
        start:  mov ax,j0040h
        mov ds,ax
        mov dx,ds:LPT1           ;dx=LPT1 data port
        inc dx                   ;dx=LPT1 state port
             inc dx                   ;dx=LPT1 command port
        mov al,08h
        out dx,al
             push dx
             mov dx,0032h
             mov cx,0000h
             mov ah,86h
             int 15h
             pop dx
             mov al,0Ch
             out dx,al
             int 20h
        code ends
             end start
        (上海庄炯)