netsource
Bus Design, Comprehensive, with various SPECIFICATIONs
http://www.interfacebus.com/
中国电子顶级开发网论坛
http://www.eetop.com.cn/
A complete source for reference design and some software
http://file.21ic.com.cn/
FTP List for University
http://file.21ic.com.cn/eda%BC%B0%CF%E0%B9%D8/%D4%AA%BC%FE%BF%E2/%B4%F3%D1%A7%B5%C4ftp%C1%D0%B1%ED.txt
IC/FPGA设计论坛
http://www.edacn.net/