OK, here's a question. I've been asked a few times about making the player start buttons flash when credits are pending on all games instead of just the supported Atari games. I might be able to support this with the current method MAME uses but don't know for sure. Haven't looked at how this is implemented. Since people are probably using PowerMAME for its lighting capabilty, I could support this same feature purely through the LEDwiz.
What do people think?
Mike, I think this is tougher than you think. I may be misremembering, but the way MAME did it was through the driver. You can see the start lamp code in the specific atari drivers. I suspect to "generalize" this feature you would need to add a decent amount of code in order to move the functionality "up" into core MAME.
I looked at it a while back and it looked somewhat daunting.
Anyway, not to discourage you, beacuse you are doing great stuff. Just a heads up I guess.