> Aha, right. Though, I have no funds for a Tri-res monitor, nor space. I suppose a > 24Khz-31Khz is the next best idea? > > And I'll have a look into the filterboard pinouts.
there is no 24k-31k AFAIK. most Sega cabs have either 24k or 15k-24k (dual res). After that it's either just VGA (31k) or tri-res (15k-31k)
I updated the post above with a link to a pre-made M3 JAMMA adapter....