Don't ask how to hack password. (BIOS Passwords)
#44796 by mradhuber
Fri May 11, 2007 10:11 pm
WORKAROUND FOR: Sis graphic chipset (SiS650 series, SiS661 series, SiS740, SiS741 series, and SiS760 series) on Fujitsu-Siemens Amilo Ax640 (A7640 and A1640), based on Uniwill 255KI mainboard and WXGA+ 1440x900

Some limited knowledge about flashing bios is required for this!

HTML Version of this document is included with the other files - it really looks better than this and there are more working links: ... nfo/id,10/

The SiS chipset on the VGA out currently does not allow for WXGA 1440x900 resolution. So if you want to work with a WXGA widescreen monitors attached to your notebook you run into trouble. However the chipset itself does support 1440x900 resolutions, it's just that the VGA bios, that is integrated in the mainboard bios, literally blocks this possibility, because it's too old and has never been updated.

So for solving that issue SiS ( ) recommends a BIOS Update, with VBIOS versions higher than 2.28.00 where WXGA has already been implemented from the manufacturer of the notebook or mainboard, which, in our case, would be FSC, then maybe Uniwill.

FSC however is not interested in providing such costumer support, although this would be of little work only.

The only help I can offer you is a workaround for people, who use this notebook primarily with a separate monitor and keyboard attached to it, and thus do not need the notebook LCD display that often. I have merged the new VBIOS version ~ 2.43.00 in the normal BIOS and - as consequence - the VGA out now supports 1440x900. Bad news is that the only VBIOS version available for me is the normal mainboard VBIOS - which only supports one VGA out connector - and therefore the notebook LCD panel won't work with this modified bios. So you will have to switch between bioses! I have asked FSC, Uniwill and last but not least SiS for a new notebook VBIOS version - which would mean about 5 minutes work for them even if they don't yet have one programmed (what I doubt) - but all responses were negative.

Create a bootable USB stick (use HP USB Disk Storage Format tool, e.g.) with DOS system files on it ( ), copy my files on it (available here), and use:

flash.exe to flash
original.rom is the original latest FSC bios 1.04c version - for times when you need the LCD panel working
modified.rom is the modified bios that supports 1440x900 on the VGA out, but under which the LCD panel and probably the TV-Out do not work.

DOWNLOAD HERE ... nfo/id,10/


It works for me, however. Change the bios every time you need to, but better get a reserve bios chip (from,,, or in Linz, Austria, for when you screw the old one up. Changing the bios chip is easily done by yourself if you don't have 4 left hands.

Send an Email to FSC for their terrifying service, and if they don't offer a Bios update with a new VBIOS included soon never again buy a notebook from them!

If you need to implement that workaround for another notebook the 3 things you need for AMI-bios-books are:

MMTool for merging the VBIOS in the BIOS
The mainboard VBIOS version (2.43.00)
The original Bios from your notebook manufacturer's page.

Good luck and mail me if you achieved more progress than I did with my limited knowledge. If anyone has a notebook vbios version for the above chipset please mail it to me! I can't extract phoenix vbios modules, however.
MAIL: ... Itemid,82/

Cheers, Mike

PS: Why the hack can't I post in HTML here?? I've written that in html on purpose, now everything looks terrible!

FSC Service Protokoll

Sehr geehrter Herr,
wenn Sie ein BIOS Update benötigen, finden Sie dieses auf unserer Homepage zum Download. Suchen Sie bitte unter "Downloads" mit der Seriennummer oder der Produktbezeichnung "7640".
Fujitsu Siemenes Supporthomepage:
Hinweis: BIOS Updates erfolgen stets auf eigene Gefahr.
Mit freundlichen Gruessen
[Name entfernt]
Ursprüngliche Nachricht:
Das entspricht leider nicht der Wahrheit da die externe Auflösung mit
UniVGA3 momentan bis 2048x1536 möglich ist. Jedoch ist die Option 1440x900 nicht darunter. SiS erwähnt explizit in den FAQ der Homepage dass 1440x900 mit SiS M760 möglich sei, jedoch das Bios zuerst upgedatet werden müsse, und verweist dabei auf den Mainbord-Produzenten.
Mit freundlichen Grüßen
Sehr geehrter Herr,
mit der in Ihrem Notebook verbauten Grafikkarte ist eine maximale externe Auflösung von 1024x768 Pixeln möglich.
Mit freundlichen Gruessen
[Name entfernt]
Fujitsu Siemens Computers GmbH
Technischer Support