if you want to use a old pc as a testrig for testing Arcademonitors, you dont need a pc monitor, you need some kind of output solution that takes care of the signal needed for the monitor you want to test.
so if you want to test a 25 Khz monitor, you need something like soft25Khz to make the outputsignal 25Khz, so you can test your monitor then..
Or the ArcadeVGA card which also produces the correct output AFAIK.
The PII will be sufficient like andre describes, for simple games under DOS
Windows is needed for Nokia Monitor test, but that runs since win95 i belief, and win 98 you can install with 32 MB's so for pure testing purposes, it will be sufficient
if you want a few test / mame PC's i can drop some P4's at eurocade into my car tough... (P4 1,8Ghz) 5-6 pieces "on stock" on my attic
