I found a way to make nullDC run faster kinda. You see i ran a prog called !xspeed and it makes the game play faster. I think it could be useful for slower games maybe or if you want to speed the game up a little. If you run !xspeed and boot nullDC when it starts up the DC logo goes really fast then boots the game. The game runs faster on some parts and some parts its the same speed or slightly faster, better game play. !xspeed is adjustable and you can go slower too if you want but why would you want to do that? lol
Ive tested (sonic adventure 1,2 plays much faster) some games. 2 seems to play smoother.
(DOA2 slightly faster, less skippy)