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S3 UniChrome, Free Resolution

Posted: Sat Feb 10, 2007 10:32 pm
by Marco78

first, i'm from Germany. My english isn't so good. Man kann mir aber auch gerne auf deutsch antworten.

I have a MSI MK3M-V (MS-7061) with VIA/S3 UniChrome IGP.
Because i want to connect the VGA directly to the SCART of a PAL-TV i had to change the Resolution, Refreshrate and had to select interlaced for the IGP.

PowerStrip for Windows is a Programm, that allow all this settings. But the Motherboard BIOS with VGA-ROM does not Support the Resolution.

I need 720X576 Pixel @25Hz/50Hz interlaced

VIA also didn't support free Resolution. With many other Card's and Driver's does it work with PowerStrip.

I updated the VGA-Rom in the BIOS from KMCRT_09.ROM to KMCRT_13.ROM. But nothing changed.

Can someone help me with my Problem and fix the BIOS to apply other Resolutions. Best where free scale. Or 720X576.
And the RAMDAC/Pixel Clock have to set some MHz (around 5) lower then yet.
And i have to enable interlaced.

Many Thx to all how want to help.

PS: I can't use another Grafikcard for the PC. There is no more Space in the Case. It's a HTPC.

The ROM can be downloaded here:

Posted: Sun Feb 11, 2007 3:10 pm
by KachiWachi
Unfortunately, you can't add resolutions that the Video Chip itself was not designed to display. :(

Posted: Sun Feb 11, 2007 4:27 pm
by Marco78
KachiWachi wrote:Unfortunately, you can't add resolutions that the Video Chip itself was not designed to display. :(
The VideoChip is desinged to display this and other resolutions.
It's also desinged to show interlaced. That what i need too.

With the Opensource Unichrome-Driver for Linux every Resolutions is possible.

I looked around many hours in on many Sites to get this Information. It's only a Problem about the BIOS and the Windowsdriver.

Posted: Sun Feb 11, 2007 6:07 pm
by cp
Virtually every video chip is designed to display every resolution (limited by ramdac and available memory ofcourse). and yes, it is a windows issue. tell VIA to write a driver or include every resolution in the vga bios (i doubt that there's enough space ;)) or go for an OS that supports modelines.

Posted: Mon Feb 12, 2007 2:40 pm
by KachiWachi
This is what I meant (@what cp said).

Since I could not find a "white paper" on this setup explicitly defining the hardware, I chose to word my response in a general manner.


Posted: Tue Dec 16, 2008 9:22 pm
by Marco78
One Year later...
Maybe someone knows a new solution.

Thx for our help!!!!!!!

Posted: Tue Dec 16, 2008 9:39 pm
by cp
the solution still is:

a) tell VIA to write a proper driver
b) use an OS that supports drivers with (virtually) free resolution

i can for sure tell you that b) is not available with Microsoft Windows.