MAMEWorld Central >> Hardware
View all threads Index   Threaded Mode Threaded  

Pages: 1

entity
MAME Fan
Reged: 03/18/13
Posts: 4
Send PM


How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc?
#328553 - 07/24/14 05:33 AM


I'm curious because I just acquired an ATI Theater 750 PCIE card, and there's no ordinary options to lock AGC or disable it. There's also no option to capture full NTSC with the VBI region intact (don't know the horizontal resolution. 848?. Vertical resolution is 525).

Would be great to know exactly how to get full ntsc frame capture with vbi region intact, and disable AGC (might as well be macrovision). Particularly on ATI theater cards (ATI Theater 750 PCIE in my case).

I've tried dscaler but setting a custom resolution gives an error. Also looked through registry but can't find anything.

Find it a little disturbing that Mame's laserdisc capture method is so closed. It would certainly help a great deal to open up a little more, especially for those that have legally obtained their arcade game laserdiscs.

Regards



entity
MAME Fan
Reged: 03/18/13
Posts: 4
Send PM


Re: How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc? new [Re: entity]
#328674 - 07/26/14 01:57 PM


bump



Dullaron
Diablo III - Dunard #1884
Reged: 07/22/05
Posts: 5505
Loc: Fort Worth, Tx
Send PM


Re: How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc? new [Re: entity]
#328675 - 07/26/14 02:15 PM


> bump

Dev's hang out. http://forums.bannister.org/

Ask there instead. Don't bump or spam there please. They might not know.



Windows 10 Pro 64-bit / Intel Core i5-4460 3.20 GHz / 8.00 GB RAM / AMD Radeon R9 200 Series
http://us.battle.net/d3/en/profile/Dunard-1884/
https://sites.google.com/site/o0kinghanco0o/mame_building_info (Updated on the 07/18/2017 at 9:49 PM.)



StilettoAdministrator
They're always after me Lucky ROMS!
Reged: 03/07/04
Posts: 6175
Send PM


Re: How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc? new [Re: entity]
#328676 - 07/26/14 02:59 PM


> I'm curious because I just acquired an ATI Theater 750 PCIE card, and there's no
> ordinary options to lock AGC or disable it. There's also no option to capture full
> NTSC with the VBI region intact (don't know the horizontal resolution. 848?. Vertical
> resolution is 525).
>
> Would be great to know exactly how to get full ntsc frame capture with vbi region
> intact, and disable AGC (might as well be macrovision). Particularly on ATI theater
> cards (ATI Theater 750 PCIE in my case).
>
> I've tried dscaler but setting a custom resolution gives an error. Also looked
> through registry but can't find anything.
>
> Find it a little disturbing that Mame's laserdisc capture method is so closed. It
> would certainly help a great deal to open up a little more, especially for those that
> have legally obtained their arcade game laserdiscs.
>
> Regards

I pinged WarrenO (the other person who helped with this) on your behalf, hopefully he should be along later to comment.

Aaron is not likely to comment here, though it's always possible he'll make a liar out of me. You can try sending a PM, or using the contact form on his old site, but he's mostly retired from MAME at this point.

- Stiletto



Lord Nightmare
Speech Synth Berzerker
Reged: 03/08/04
Posts: 847
Loc: PA, USA
Send PM


Re: How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc? new [Re: entity]
#328705 - 07/27/14 04:25 AM


> I'm curious because I just acquired an ATI Theater 750 PCIE card, and there's no
> ordinary options to lock AGC or disable it. There's also no option to capture full
> NTSC with the VBI region intact (don't know the horizontal resolution. 848?. Vertical
> resolution is 525).
>
> Would be great to know exactly how to get full ntsc frame capture with vbi region
> intact, and disable AGC (might as well be macrovision). Particularly on ATI theater
> cards (ATI Theater 750 PCIE in my case).
>
> I've tried dscaler but setting a custom resolution gives an error. Also looked
> through registry but can't find anything.
>
> Find it a little disturbing that Mame's laserdisc capture method is so closed. It
> would certainly help a great deal to open up a little more, especially for those that
> have legally obtained their arcade game laserdiscs.
>
> Regards

ATI TV Wonder 650 PCI card, and hacked/customized windows drivers (so vblank gets captured instead of being thrown out). I'm not sure of any details beyond that.

LN



"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"



entity
MAME Fan
Reged: 03/18/13
Posts: 4
Send PM


Re: How did Aaron capture laserdisc with ati theater 650 and virtualdub, with vbi region intact and manual agc? new [Re: entity]
#328930 - 07/30/14 03:05 PM


Joshua Roys has been reverse engineering the ATI Theater 750 for a Linux driver https://github.com/roysjosh/tvw-sdr. He's discovered register values with corresponding names. I'm not sure what method he's using.

After looking at Joshua Roys work, I dug into the driver files from Diamond's website (the same drivers I use for the Theater 750 PCIE card). I found read/write registers in the gtatinavrr.sys file with a disassembler (pe explorer). Most notable is the FreezeAGC register with a 0 bit. There's more registers with TBC, vertical/horizontal size, etc. Beyond that I'm not sure I can do much else.

Any help beyond this would be greatly appreciated!


Pages: 1

MAMEWorld Central >> Hardware
View all threads Index   Threaded Mode Threaded  

Extra information Permissions
Moderator:  Gatinho 
0 registered and 3 anonymous users are browsing this forum.
You cannot start new topics
You cannot reply to topics
HTML is enabled
UBBCode is enabled
Thread views: 2021