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目前的PC及其兼容机,其接口的标准配置,一般是一个并行口,二个串行口,一个软驱接口,一个或二个硬驱接口,这对于一般用户是够用了。但有时如果你需在一台主机上同时连接上多个并行或串行设备,如同时使用针式打印机、彩色喷墨打印机,或同时连接其它并行设备;同时连接鼠标器、调制解调器(MODEM)、串行打印机等串行设备,标准配置的一并二串口就显得不够用,这时我们是否自己可以动手扩展呢? PC及其兼容机采用总线结构,其并行接口地址为:3BCH、
The current PC and its compatible machines, the standard interface configuration, the general is a parallel port, two serial ports, a floppy drive interface, one or two hard drive interface, which is enough for the average user. But sometimes if you need to connect multiple parallel or serial devices to a host computer at the same time, such as using a dot matrix printer, a color inkjet printer, or connecting other parallel devices at the same time, a mouse, a modem, Line printers and other serial devices, the standard configuration of the two serial port is not enough, then we can do it yourself expansion? PC and compatible with the bus structure, the parallel interface address: 3BCH,