AWARD Bios Modular 4.50pg does not clear the keyboard buffer after reading the BIOS password during system startup, which allows local administrators or users to read the password directly from physical memory.
http://www.securityfocus.com/bid/15751
http://www.securityfocus.com/archive/1/419610/100/0/threaded
http://www.pulltheplug.org/users/endrazine/Bios.Information.Leakage.txt
http://www.kb.cert.org/vuls/id/847537
http://www.ivizsecurity.com/research/preboot/preboot_whitepaper.pdf