dos命令：系统命令

串行端口:          MODE COMm[:] [BAUD=b] [PARITY=p] [DATA=d] [STOP=s]
                                [to=on|off] [xon=on|off] [odsr=on|off]
                                [octs=on|off] [dtr=on|off|hs]
                                [rts=on|off|hs|tg] [idsr=on|off]

设备状态:          MODE [device] [/STATUS]

打印重定向:        MODE LPTn[:]=COMm[:]

选择代码页:        MODE CON[:] CP SELECT=yyy

代码页状态:        MODE CON[:] CP [/STATUS]

显示模式:          MODE CON[:] [COLS=c] [LINES=n]

击键率:            MODE CON[:] [RATE=r DELAY=d]