说明：  本实验利用PS/2接口实现了与鼠标通信，并将鼠标的按键信息通过D6，D7，D8，D9 来直观的放映，其中D6，D7代表鼠标右键的状态，当鼠标右键没有按下时，D6，D7两 个灯都不亮，当鼠标右键有按下时，D6，D7两个灯同时点亮。与此相同，D8，D9则代 表鼠标左键的状态。而鼠标的移动状态，我们是通过七段数码管来表示，低两位的数 码管表示X轴的移动点数，高两位的数码表示Y轴的移动点数。
(the experimental use of PS/2 interface with the click of the mouse communications, and the mouse buttons and information through D6. D7, D8, D9 to visual screening, D6, D7 right-clicking on behalf of the state, with the right mouse button pressed, D6, D7 two lights are not bright, with the right mouse button is pressed, D6, D7 while two lights lit. Likewise, D8, D9, on behalf of the state of the left mouse button. And the movement of the mouse state, we agreed to in paragraph 107 of the digital control, low two digital X-axis of said mobile Points Gao said the two digital mobile Y-axis points.)