Seems like we keep having this discussion on older machines and MAME performance. While we probably won't ever get a full table of comparisons (CPU speed x Memory x OS x MAME version x Frameskip x etc.) -- hey, wouldn't that be a great reference? --
Guess the best we can do is post our own personal so-and-so's.
For example:
AMD K6-2 333, 256MB RAM, Win98, 16MB vid ram, run MAME v0.57 at best
PII 300, 512 RAM, Win98, 32MB vid ram, runs MAME v0.69 at best
and I used to have an old 486-66 64MB RAM, 12MB vid ram running MAME v.37b6 I think.
(hey at that time that was latest version)
(and note, "at best" was measured without proper benchmarking
and possibly after several beers)