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 Post subject: Groovymame build for a standard VGA PC CRT?
PostPosted: Thu Jul 30, 2020 8:49 pm 


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Joined: 07 Sep 2013
Posts: 1394
Location: Pennsylvania
I'm interested in groovymame, have my eyes set on an auction which ends tonight for an Optiplex 7020 with a 3.30 GHz i5-4590. Assuming I can nab it, I was thinking of getting a radeon HD 5450 and a 250 gb SDD.

How well would this hardware setup run on the latest groovymame? Will Cave CV1000 and 3D stuff run alright?

Then there's the matter of the video output, The only CRT I have is a standard Dell m782p CRT monitor. I was thinking of just using that in conjunction with a scanline generator to get a pseudo 240p image, but I was wondering, would not using a 15 kHz monitor defeat the purpose of Groovymame to begin with? What is the benefit of using Groovymame to begin with? I'm still trying to understand whether there would be any real difference between groovymame with a proper build vs. just running my laptop with a vga cable to my crt if I'm going to be using 31 kHz.
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 Post subject: Re: Groovymame build for a standard VGA PC CRT?
PostPosted: Thu Jul 30, 2020 11:21 pm 


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Joined: 16 Jan 2014
Posts: 972
If you are using a 31KHz CRT, there is no reason to mess with CRTEmuDriver or Groovymame. Just use faux scanlines and/or GFX shaders. The whole purpose of GroovyMAME is to output to a 15KHz CRT.

That i5 should be fine for just about everything thats emulated well enough to play.


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 Post subject: Re: Groovymame build for a standard VGA PC CRT?
PostPosted: Fri Jul 31, 2020 1:27 am 


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Joined: 25 Mar 2009
Posts: 262
Location: USA
Crtemudriver + groovymame is still worth it for 31khz, because it will still output the game's original refresh rate. Many arcade games deviated from the standard of 60hz. Neo-Geo with 59.1hz, Mortal Kombat 1-3 was 54hz, R-Type 55hz, etc.


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 Post subject: Re: Groovymame build for a standard VGA PC CRT?
PostPosted: Fri Jul 31, 2020 7:15 am 



Joined: 12 Mar 2019
Posts: 242
Isn't the frame delay feature still exclusive to Groovymame? That allows to cut another frame of input latency on CRTs, no matter their scan rate. The official Mame doesn't have this, but it actually does allow to sync with the original machine's refresh, even for the weird ones.

User Xyga's posts on the subject here in this forum answer most of the opening questions.


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