He's using dual multitab to connect 8 controllers and then programming game through control ports, more here http://hackaday.com/2014/01/10/teaching-mario-to-pl

He's using dual multitab to connect 8 controllers and then programming game through control ports, more here http://hackaday.com/2014/01/10/teaching-mario-to-play-pong-and-snake-through-innumerable-exploits/ http://hackaday.com/2014/01/10/teaching-mario-to-play-pong-a...