Build Your Own Arcade Controls Forum

Software Support => GroovyMAME => Topic started by: bulbousbeard on September 01, 2013, 01:24:15 pm

Title: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: bulbousbeard on September 01, 2013, 01:24:15 pm

I noticed that GroovyMAME seems to try two different resolutions for these games (Mortal Kombat 1, 2, 3, etc.).

First, it tries 399x253@58hz, but then it settles on 400x254x54hz.

Any idea why it's doing this? What resolution and refresh rate did these games actually use?

Thanks!

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: Calamity on September 07, 2013, 11:55:00 am

GroovyMAME switches resolutions when the emulated game requests it to do so. This is because many actual games actually did switch resolutions. It could be that there is a difference between the resolution reported by the xml data (the one that's calculated initially) and the actual resolution being used by the game. Anyway, yes 254p@54Hz is the right resolution for Mortal Kombat.

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: bulbousbeard on September 07, 2013, 12:26:27 pm

Thanks for the reply. This does cause a problem when using monitor lcd and Powerstrip, because the games end up running at 58hz, which is the wrong refresh rate, and the games are choppy.

I'm going to bug MAMEdev about this and see whether the XML output can be fixed.

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: Calamity on September 07, 2013, 12:44:43 pm

Hi bulbousbeard,

Before you write to MAMEdevs...

I'm quite sure the XML for MK is right. This was the typical game I tested with my old LCD + Powerstrip and I am sure it was running at the supposed 54 Hz.

So consider posting a log here so I can check it.

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: bulbousbeard on September 07, 2013, 01:22:37 pm

Calamity,

I looked at the log and realized that the desktop wasn't at the LCD's native resolution. When I switched it to the LCD's native resolution, the games were smooth even though they're still reporting the 58hz refresh rate in Game Information.

Thanks!

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: Calamity on September 07, 2013, 01:27:15 pm

You need to use the "monitor lcd" setting, then adjust the "lcd_range" option with the upper and lower vertical frequencies your LCD supports.

Title: Re: GroovyMAME and Midway Y/T/Wolf Unit games
Post by: bulbousbeard on September 07, 2013, 01:57:46 pm

I was doing that. It works and is smooth now. It's just that it only works at the LCD's native resolution.

That's why it was choppy. It's a 1920x1200 LCD, and I was running at 1280x1024.