On Tue, 28 Feb 2006 21:24:46 +0800, "fixpc"
wrote:

I need circuit diagram of keyboard and mouse port, USB port, DDR port, IDE
port,... for intense study. Would you please point me there with URL?

Not all off them, but a good place to start:
http://www.hardwarebook.org/

--
Kind regards,
Gerard Bok