小巧的键盘练习器,对于现代人来说电脑键盘和鼠标已不再是陌生的事物了，这小小的东西不但是人们控制电脑的好帮手，也是我们日常工作生活的好伙伴。也许你可以打字打得飞快，或是在游戏中用鼠标指点江山，但我想你未必知道它们连接电脑的"秘密"。这一期我们以一个小巧的键盘练习器作为实例去了解PS/2键盘、鼠标与电脑的通讯协议-Compact keyboard trainer, for the modern computer keyboard and mouse is no longer a strange thing, this little thing is not only the people to control computers helpful in daily work life of our good partners. Maybe you can play fast typing, or using the mouse pointers in the game country, but I think they are connected to the computer you may not know the " secret."　In this issue we have a small keyboard trainer as an example to understand the PS/2 keyboard, mouse and computer communication protocols