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1   GroovyMAME / Re: Question about video cardson Today at 05:17:18 pm

Started by tonyt76 - Last post by Zebidee

There isn't much point to chasing newer gruntier video cards for GroovyMAME/MAME as it doesn't push their performance. Most people would just recommend something HD5000+ with analogue RGB outputs.

I've said this already in other threads (this is a very common question which I see pop up very frequently), but I'll repeat this here: newer cards buy you a better DAC which will give you a better image, crisper, more vivid colours.

It's not just about the grunt, it's about the technology used in translating the digital signals to analog.

I looked this up and Wikipedia says that RAMDAC (that is a set of 3 DACs built onto a chip with a little bit of RAM) speeds haven't really changed since 2006 (~400MHz with some exceptions). Also that DACs are essentially obsolete with "true color" modes and obviously with digital-only video signals.

The DAC needs to be fast, but all that really matters is that it is fast enough, faster than the monitor's ability to display an image. For 15khz CRTs using GM with super resolutions the maximum might be (2560*576*60) * 1.5 (allow for blanking lines) = estimated 132.71MHz speed required, well below 400MHz capability of most modern GPUs. After that any performance improvement regarding colour sharpness/clarity must be very marginal at best.

Maybe a VGA monitor could come close to the limit, but only at very high resolutions or refresh rates.

If you look around you'll find some discussion of this on overclocking forums, where they generally come to the conclusion that overclocking RAMDAC is pretty pointless in most cases, and the discussion just disappears in the era of digital displays.

So I just don't see that there is any way a faster DAC will make my blues bluer or my lines crisper, these things are determined by the limitations of my analogue display.

https://en.wikipedia.org/wiki/RAMDAC

Started by ChanceKJ - Last post by ChanceKJ

Thanks guys! :)

Ive sent you all PMs

Started by Silvercloud1959 - Last post by Spank

Force uses 3.5 inch desktop IDE drives.

4   GroovyMAME / Re: Question about video cardson Today at 03:14:25 pm

Started by tonyt76 - Last post by donluca

There isn't much point to chasing newer gruntier video cards for GroovyMAME/MAME as it doesn't push their performance. Most people would just recommend something HD5000+ with analogue RGB outputs.

I've said this already in other threads (this is a very common question which I see pop up very frequently), but I'll repeat this here: newer cards buy you a better DAC which will give you a better image, crisper, more vivid colours.

It's not just about the grunt, it's about the technology used in translating the digital signals to analog.

Started by ChanceKJ - Last post by cyberphox

Did I hear plans were available? :)
Can I get in on this train too!  Thanks!

6   GroovyMAME / Re: Audio distortion with some gameson Today at 02:00:47 pm

Started by telengard - Last post by Calamity

After checking your log, I'd try using -resolution 720x480 with this particular game and see if it changes anything (this is to discard it's a problem with super resolutions).

Started by Titchgamer - Last post by Titchgamer

Fair enough, I just took the full quote from its website.

https://www.sindenlightgun.com/

Maybe theres a character limit I dunno.

Started by bobbyb13 - Last post by bobbyb13

Funny that, I discovered that the reason I couldn't find my original one was that it was sold- along with boxes of cartridges- for $40 at a yard sale.

Apparently nobody thought I would have still wanted it.
Of course it explains this new replacement.

Thanks for the tip Howard.  I'll have to look into that too when I have a chance.

Started by Electrickone - Last post by bobbyb13

Sorry I don't have one to send you but I see them on fleabay every once in a while.

Have you sent Andy an email to see if he has any lying around (which aren't maybe shown on the website anymore?)

10   GroovyMAME / Re: Frame Delay adviceon Today at 01:41:19 pm

Started by Maccy - Last post by Calamity

@Maccy,

Yes, unfortunately this happens on some systems, running at 120 Hz + frame delay is more demanding than frame delay alone. Probably I'll make the "soundsync" feature optional at some point to avoid the annoyance.

Anyway, try to figure out if there are some background tasks stealing cpu time from us.
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