绝对真实的联想ＥＴ９８０和ET280电路原理图,不用再买昂贵的ＡＲＭ开发板了，买一个二手ＥＴ９８０或ET280就可以了３00.00左右还是ＡＲＭ11呢!

用FPGA 编写的双端口的RAM，可以实现读写，希望通过这个平台与各个大神交流，希望得到大神的批评指正。(Prepared by FPGA double port RAM, you can read and write, and I hope that through this platform to communicate with the great gods, hoping to get criticism of the great god.)

旧atmega64实现万年历程序，屏幕用的也是二手的192*64的屏 带字库(The old atmega64 implements the calendar program)