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Problem with Mame32 - slow motion

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u_rebelscum:
As others have said, some games had hardware that takes a lot of CPU to emulate.  Most are due to powerful processors on the original arcade boards, definitely including the NBA game you mentioned.  Old games (like asteroids) had discreet circuits that take a lot of CPU to emulate; mame now emulates these circuits for asteroids instead of using sound samples.

OTOH, depending on the settings, the video card can be a choke point.  How much depends on how well the video card does resolution and directX (direct3D or directDraw), and if you're using the overlays, video effects, or stretching.  Asteroids, a vector game, runs at a fairly high res and has overlays IIRC, so the video card could be adding to its slow down.  Add that old onboard video chips used CPU and main memory, that's "speed" stolen from mame.

So, while adding the video will most likely help, it won't help enough for the NBA game, and might help asteroids.  (I have ati 9650 card.)

Flake:
I can get NBA Jam to work without a problem (see system specs in above post).  I dont think my processor is all that powerful.  I would think he should be able to get NBA Jam to play on his system but maybe my processor is better than I think (Pentium D's were Intel's go at dual core I think, later outdone by the Core Duo line).  I know for sure NFL blitz wont run 100% though.  NBA Jam must have less system requirements than NFL Blitz.   ???

Turnarcades:
This is a recurring topic and purely a matter of emulation quality. Check all your video settings in MAME and if you can, I'd really suggest using the command-line MAME and an older Windows build as Vista is a big RAM drainer.

Since the graphics and sound re-writes in MAME a while back benchmarking has become more difficult, so depending on what games you want to play you may do better with an older build of MAME (0.100 or lower is ideal), which were not dependant on D3D-supporting graphics cards. Not sure how new you re to MAME but remember it is designed to document and accurately emulate games, not run them at speed. As such, complex hardware (such as hard-disk games, Midway boards and unusual architecture like Asteroids) will not always run fast on any machine, as the software is just trying to emulate the hardware in a true fashion.

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