If your mouse USES a serial port, it helps if you know which port.
如果你的鼠标使用一个串行端口，如果你知道哪一个移植，它帮助。
2
A device attached to a serial port, such as a mouse or a modem, USES the device associated with that port.
对像一个鼠标或一台调制解调器这样的一个串行端口的一个装置附件，使用与那一个埠有关的装置。
3
In this article, Universal Serial Bus replaces traditional ones, and through the understanding for USB agreement and equipment frame to realize the hardware and software design for mouse.