SIS 650 - Asus P4S8L - Trying to update VBIOS

vrolijk

Hi guys,

Just got a 22" widescreen for my parents machine, which unfortunately has the crippled SiS 650 IGP. I flashed the latest official Asus BIOS, 1010 - this brings the VBIOS to 1.15.26 - not recent enough for widescreen support. The direct download link is:

http://dlsvr01.asus.com/pub/ASUS/Barebone/Pundit/Bios/1010psc.zip

I tried to hack in the more recent 2.30.01 VBIOS - fiddled with all the Asus specific checksums and got the Asus windows flasher to accept it. The PC bricked on booting, claiming invalid checksum. I managed to flash back to 1010 through the boot block code (which luckily wasn't crippled.)

I suspect that since the compressed portion of the BIOS is shorter (VBIOS 2.30.01 is 32K while 1.15.26 is 48K,) some entry point into the compressed section changed and the BIOS tanked. Another weird thing - there is a second copy of the compressed VBIOS towards the end of BIOS, right in the middle of the uncompressed pure binary section.

Anyway, if anyone has any ideas or could give me a hand, it would be much appreciated.

Edit - Removed extra URL tags for clarity. KW

vrolijk · Posted: Tue Dec 25, 2007 6:28 pm Post subject:

Got it figured out - I finally found a copy of the Asus specific CBROM in the BNTBTC collection. I managed to replace the VBIOS in the compressed section - apparently the VBIOS in the bootblock is only used during the boot sequence. The windows driver now reports VBIOS version 2.30.01 and allows all the widescreen resolutions. Woohoo Smile

Jimmy.Bellefroid · Posted: Thu Dec 27, 2007 1:25 pm Post subject:

Hi,

can you please send me your patch and a littile bit of explanation.
I'm not that great of a Bios Flasher Embarassed

I really need it, because I have a terrible pain in my eyes at the end of the day...

Greetz

cp · Posted: Mon Dec 31, 2007 12:58 pm Post subject:

patched bios sent.
_________________
If you email me include [WIMSBIOS] in the subject.

antonio · Posted: Fri Jan 11, 2008 11:09 am Post subject:

Can i also get the patched bios ?

thanks

cp · Posted: Fri Jan 11, 2008 6:56 pm Post subject:

patched bios sent.
_________________
If you email me include [WIMSBIOS] in the subject.

almope · Posted: Fri Jan 18, 2008 11:10 pm Post subject:

Hi,

Same motherboard and the same problem.
Follow provided instructions without luck.

The path of the bios update is the same:
http://dlsvr01.asus.com/pub/ASUS/Barebone/Pundit/Bios/1010psc.zip
(i've flashed this but nothing)

Can you please send me a patched bios?

thanks.

romga · Posted: Mon Jan 21, 2008 9:37 am Post subject:

Hi guys,
Same motherboard and the same problem Sad

Can you please send me this patch and a littile bit of explanation too.
Thank you in advance!

My e-mail removed by cp

prdlajs · Posted: Tue Feb 05, 2008 5:45 pm Post subject:

Hi,
would it be possible to send me the P4S8L patched bios too?

Thank you.

email address removed by cp

sp-am · Posted: Tue Feb 05, 2008 9:24 pm Post subject:

Hello,

same board, same problem...

could you please send me a patched bios too ...

Regards

prdlajs · Posted: Fri Feb 08, 2008 7:23 am Post subject:

Yesss, successfuly flashed, now the P4S8L supports the 1680 x 1050 resolution of my Benq FP202W, tested under Win XP and Kubuntu - both works great.

Many thanks for your help.

Regards

prdlajs

sp-am · Posted: Sat Feb 09, 2008 5:28 pm Post subject: ? Black screen after flashup ??

Hi
I got a black screen after flashup.
With some effort and a PCI VGA card I got a bright screen again and flashed it back to my old bios.

Any suggestions ?

Regards ...

raktas · Posted: Mon Feb 11, 2008 7:23 pm Post subject:

Hi,
Same board same problems Sad

Can I get patched bios too?

Thanks

cp · Posted: Tue Feb 12, 2008 8:26 pm Post subject:

sent
_________________
If you email me include [WIMSBIOS] in the subject.

raktas · Posted: Wed Feb 13, 2008 8:07 pm Post subject:

thanks. ir worked fine Smile