说明：  通过用汇编语言编写液晶屏幕显示程序,连接左右液晶地址口和数据口,通过开关来来控制点亮和点灭.点亮开关则显示欢度佳节4个字样,点灭则屏幕是空.
(Through the use of assembly language procedures for the preparation of liquid crystal display, LCD address to connect around the mouth and data port, through the switch to control light and point out. Lit switches show to celebrate the festive season four words, point out the screen is empty.)