As far as I can see only his Donkey Kong records were disputed. "on July 3, Mitchell achieved the perfect score at an arcade in Laconia, New Hampshire, and set

As far as I can see only his Donkey Kong records were disputed. "on July 3, Mitchell achieved the perfect score at an arcade in Laconia, New Hampshire, and set the game's world record as recorded by Funspot and Twin Galaxies". So no MAME involved in that one. "With a camcorder supplied by Funspot bearing down over his shoulder, Mitchell’s every last move was taped for posterity -- if not, at least, for irrefutable proof of the achievement. " https://www.funspotnh.com/-Articles/pc-billymitchell.htm https://www.funspotnh.com/-Articles/pc-billymitchell.htm