Posted by Elvis_P on 12, 2001 at 5:32 AM:
I don't think anyone mentioned this on this board but the upcoming advancemame will have arcade monitor simulation filter effects.
And apparently it doesn't even take a lot of processor time:
From the advancemame mailinglist
Andrea Mazzoleni I did a lot of optimization on all the blitter code. Now all the mean/filter/fractional effects are faster than before. The new RGB effects don't add a noticeable slowdown. The only problem is
that they work only on 15/16 bit video modes.