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Strange issue with GroovyMame v.146

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mamenewb100:
I've heard a few other people mention similar problems. I have an issue where certain games (especially older ones) will not maintain 100% emulation sync speed without triple buffering enabled. Allot of games will run at 99%, 101% and many (like Mortal Kombat) at 110% speed. Some games run consistantly at these faster/slower rates while some jump all over the place and reach as high as 200% emulation speed. This is with NO frameskip enabled.

I'm thinking it might be Win 7 64-bit issue with GroovyMame since others having this type of issue mentioned the sane version of windows. I've gone through all the recommended settings and none of them seem to have effect. The only option that fixes it is having triple-buffering enabled. Of course that means goodbye to smooth scrolling.

GroovyMame works flawlessly other than this problem i'm having. Any ideas?  :dunno

P.S. I'm using a Makvision 29" Arcade monitor 31 khz model with ArcadeVGA.

Calamity:
Hi mamenewb100,

What video card and monitor type are you using?

mamenewb100:
I'm using a Makvision 29" Arcade monitor 31 khz model with ArcadeVGA 3000

Calamity:
Well, it's completely normal that your emulation speed is not 100% for many games, as we can't tweak the AVGA3000 video modes under Windows. If we want smooth scrolling, everything must be forced to run at 60 Hz, because that's the refresh that most AVGA3000 modes are defined. This will cause acceleration or slowdown depending on the original game's speed.

The triplebuffering in GroovyMAME just ignores the video card refresh and just relies on CPU clock, that's why it runs at perfect 100%, but scrolling is ruined.

As an alternate solution you can try the GroovyArcade Linux live-CD, this one can reprogram ArcadeVGA3000's modes so the result is perfect.

mamenewb100:
Yeah, I'm just fine with the games that run at tad fast or slow. It's the ones that run at a consistant 110% speed that is odd. I understand that AVGAs modes are not very tweakable.

I'd love to use the Linux Live CD... except my Frontend is Hyperspin. I tried enabling force 60 Hz in AVRES utility for AVGA but it didn't seem to do anything. I'm just wondering what would cause games to run at 110%. Must be somekind of syncing issue with refresh rate and resolution I guess.

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