Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: lodoss118 on July 16, 2014, 05:27:25 am

Title: ArcadeVga trying to mimic and get native 15khz
Post by: lodoss118 on July 16, 2014, 05:27:25 am

Hi guys was wondering if anyone knew about Andy's arcadevga bios and drivers modification. My understanding is that ATI provided him information how to do this, now my question is, if someone here can do the same and maybe be able to use a newer ATI card.

Title: Re: ArcadeVga trying to mimic and get native 15khz
Post by: lodoss118 on July 16, 2014, 06:06:12 am

Found something here:

http://hardforum.com/showthread.php?t=1605511 (http://hardforum.com/showthread.php?t=1605511)

http://morrisoft.wordpress.com/2010/07/20/morrisoft-ati-custom-resolution-tool/ (http://morrisoft.wordpress.com/2010/07/20/morrisoft-ati-custom-resolution-tool/)

http://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU (http://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU)

Title: Re: ArcadeVga trying to mimic and get native 15khz
Post by: Calamity on July 16, 2014, 04:12:28 pm

Hi lodoss118,

Thanks for the links, basically the registry method is the same we're using, and the other one is the custom EDID method that we've been experimenting with too. Anyway this ATI Custom resolution tool has a feature to reset the driver which is... inspiring :)

Regarding the AVGA, as it has already been discussed, Ultimarc got its specialized bios directly from ATI so it is proprietary material. I have no interest in reverse engineering it, not now nor in the future.

Considering that the probability of ATI providing us with the information tends to zero, our only chance is to reverse engineer the drivers in the hope that the functionality still exists and it's a matter of exposing it. A task that's certainly possible but unlikely in practice for people with normal jobs & family.