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Centipede and MAME .143

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paigeoliver:
The original  machine is a cabaret with a newer Happ trackball and a leaf switch fire button (just recently replaced the vertical microswitch button that was on it when it first arrived).

My setup has mame .55, mame .72, mame .106 and a really bleeding edge install that has nothing but robotron on it. The trackball is a 3" happ model with no wear. The buttons are normal happ microswitch buttons, the OS is windows xp and the PC would have passed as a fairly hot gaming PC 7 or 8 years ago.

Gatt:
I'd be willing to bet your mini-pac or trackball is failing.  It's hardware related,  you isolated it to the control panel.  If I had to bet on a component,  I'd say it's the Mini-pac going bad.  If the trackball were going bad,  it would likely be mechanical failure and would be consistent.

The Mini-pac OTOH,  could initially appear to be ok,  but as it's used whatever component is failing slowly degrades performance.  I'm not familiar with that kind of board/processor design to comment more specifically on what might be failing in it,  on a PC that's behavior I'd expect to see with failing memory/cache memory.  Anyways,  each time you stopped using it as input,  or switched it to another system,  it initially works/improves but then degrades.  Replace the Mini-pac IMO.

Edit:  Actuallly,  double check me,  play marble madness for a bit.  If you see the same behavior,  replace the mini-pac.  Apologies...sleepy!

boardjunkie:
Trackball has nothing to do with the fire switch. Its in the software...I can even hear the delay in the sound. If I smack the button hard enough to get a nice "crack" sound, you can hear the delay when the game produces its fire sound. Its somewhere around 60-80ms, which is quite noticable and *annoying* when play'n the game.

boardjunkie:
I keep an old .37 version around just because. I just fired C-pede up in that and...same lag.

Calamity:
Hi boardjunkie,

Are you using any sort of vsync (-syncrefresh, -triplebuffer, etc.)?

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