A couple of extra tips:(posted 9479 days ago)Turn of the sound or lower the resolution to 11025hz. On my P200, turning off sound on the Capcom CPS-2 or Sega System 16 games improves speed by about 20% and reducing it to 11025hz gives me about an extra 10% speed.
Use the DOS version in pure DOS mode, not through Windows. I've not tried it but I hear it makes a significant difference.
JSW, why don't you like autoframeskip? I think it's the best thing to ever come to MAME, if everyone was to use it then there would be no slowdown cheating. With autoframeskip the speed doesn't drop below 100% until the frameskip reaches 12 and by this point the game is so jerky that it is unplayable. So rather than the game becoming easier on a slow PC, it becomes harder. I just set every game to autoframeskip and if it's too jerky then I turn off the sound and just about about everything runs fine on my P200 - apart from the Midway games (MK, Smash TV, etc). But the Capcom CPS-2 and Neo-Geo games are fine - and I get a better frame rate than I was getting in m0.34.
Dith