The two games this happened to me with are Final Fight and Fatal Fury Special…pretty wildly different types of software, there. I wondered what could have gone wrong, so my guess (?) is that it’s a problem with the core itself?
It’s the core that is just labeled “MAME” and appears as “MAME v.170” in the lower left hand side of the screen when Loaded.
If there’s a problem, I hope y’all solve it Check out the hook while my DJ revolves it