Black Cat OS
Links
http://www.osdever.net
a good site with alot of info for building your
own OS
http://falconrybells.co.uk/
a good os that I plan to use some code from
http://bos.asmhackers.net/index.php
another good os i used some of ver 0.03 for BCOS 0.05
also has info for os dev in docs section.