http://www.icaen.uiowa.edu/~vlsi1/web_131_dir/mentor.html
(MGC help)

http://developer.intel.com/technology/itj/
(Intel Technology Journal)

http://www.sandpile.org/index.htm 
(Processor infos)

http://x86.ddj.com/intel.doc/inteldocs.htm
(Great documentation on intel processors)

http://www.enler.com/ruya_takim/bjk/