> Absolutely. Is there a central registry of every contributor ever? > Yes there is! the credits files from every mame version since ever. Also we have source code dating back to the earliest open source mame versions, and core files borrowed from elsewhere have credits in them.
The task is less impossible than you think, though it is definitely going to be a lot of work to track some people down.
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"