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I forgot my BIOS password. What can I do ?

The following descriptions only apply to Toshiba notebooks. General information can be found here.

Version 1
1. Your notebook
2. An empty formatted diskette (720KB or 1.44MB)
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 2 (boot sector is sector 1) 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.

Version 2
Parallel port loopback
It's a simple device that you connect to your parallell port. A lot of Toshiba computers remove the password when you boot it up. The device could be made out of any parallell wire with 25pins connectors (db25).

You should connect these pins:
1-5-10 1= STROB, 5=DATA BIT, 10=ACK
2-11 2=DATA BIT0, 11=BUSY
3-17 3=DATA BIT1, 17=SCT IN
4-12 4=DATA BIT2, 12=PAPER END
6-16 6=DATA BIT4, 16=RESET
7-13 7=DATA BIT5, 13=SLCT OUT
8-14 8=DATA BIT6, 14=AUTO FEED
9-15 9=DATA BIT7, 15=NOT CONNECTED (sometimes +5.0V)
18-25 GROUND