Copie d'un message trouvé ici: http://packetstormsecurity.org/Crackers/bios/toshiba-keydisk.txt

Pour supprimer le mot de passe du bios d'un portable toshiba. Comme j'ai justement un portable de ce type, je gardes l'info. 

Received: Identities Changed to Protect the Innocent
Delivered-To: bugtraq_lists.securityfocus.com
Delivered-To: bugtraq_securityfocus.com
Date: Wed, 23 Feb 2000 22:52:08 -0000
Sender: Bugtraq List <BUGTRAQ_SECURITYFOCUS.COM>
Subject: Re: Toshiba NoteBooks BIOS Password Backdoor - Password Cracker -
    Follow The Instructions.
To: BUGTRAQ_SECURITYFOCUS.COM

The one and only way to bypass the Power On BIOS password 
of a Toshiba Notebook. This method works on all models. 

This is what you need:

1. Your notebook
2. An empty formatted diskette (720 kb or 1,44 mb)
3. A second computer (e.g. a DOS desktop PC)
4. A hex-editor (e.g. Norton DiskEdit or HexWorks)

This is what you have to do:

1. Start the desktop PC and start the hex-editor
2. Put the disk in drive A:
3. Change the first five bytes of sector 1 (boot sector is 
sector 0) to: 4B 45 59 00 00
4. Save it! Now you have a KEYDISK
5. Remove the disk from drive A:
6. Put the disk in the notebook drive
7. Start the notebook in Boot Mode (push the reset button)
8. Press Enter when asked for Password:
9. You will be asked to Set Password again. Press Y and 
Enter.
10. You now see the BIOS configuration where you can set a 
new password.

And that's all!

Oscar Vila