Bpwd is a GNU/Linux tool that allow you to tweak BIOS supervisor
passwords by accessing directly the NVRAM, aka the CMOS RAM.
It can find them with the help of brute-force (all possible combinations
of characters are tried), test a password list, or even simply
enable/disable them by modifying BIOS settings.

http://www.zorinaq.com/projs.html
http://www.zorinaq.com/bpwd/