基于USB的通信程序开发，附源码，在EDA平台上实现 -USB-based communications program development, with source code, in the EDA platform

In this example w ill interface the PS/2 port to a PS/2 keyboard, also known as an AT keyboard. The example will not apply to the newer USB keyboards, or to the older, obsolete XT keyboard. Keyboards contain their own microprocessors that conti