Toshiba T4400 password

From: Dave Dunfield <>
Date: Wed Nov 10 18:56:00 2004

At 19:13 10/11/2004 -0400, you wrote:
>At "Au Vieux PC" (where shopping is always an Adventure) I spotted a T4400
>with docking station and parallele port to SCSI addapter and other bits.
>All for 15 CAD.
>However, the T4400 has a BIOS password.
> Says that it's impossible to
>remove the password. Anyone here have any other ideas?
>Also, anyone want this beast?


If you have a parallel port, you should be able to do it. I have never done
this myself, however it is reported by many to work on Toshiba laptops:

----------------------- Begin Quote ----------------------
This method works on all older (ancient) 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 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.

Of course this will only work if you can still boot the machine.

Newer models try:

Toshiba notebook BIOS password removal via Parallel Port

If you make a simple device that you connect to your parallel port, a
lot of Toshiba computers remove the password when you boot it up. The
device, named "loopback" by some, could be made out of any parallel
wire with 25pins connectors. You should connect these pins:


For those who care, what is connect to what

 1-5-10, 1=Strob, 5 =data bit 3, 10 = ack
 2-11, 2=data bit 0, 11=Busy
 3-17, 3=data bit 1, 17=SLCT IN
 4-12, 4=data bit 2, 12=Paper End
 6-16, 6=data bit 4, 16=reset
 7-13, 7=data bit 5, 13=SLCT (out)
 8-14, 8=data bit 6, 14=Auto feed
 9-15 9=data bit 7, n/c sometimes +5v

If you have a newer laptop again, one without a parallel port you will
need a special USB password removal tool, and they cost much more.
---------------- End Quote ----------------

If you give up on it or otherwise decide to unload it, I have some interest
(located in Ottawa).

dave04a (at)    Dave Dunfield
dunfield (dot)  Firmware development services & tools:
com             Vintage computing equipment collector.
Received on Wed Nov 10 2004 - 18:56:00 GMT

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