Originally Posted by Shideravan
Games tested in 5492:
Megaman X3: Ratter to begin the game, that shows this screen:
[Linked Image from i701.photobucket.com]

Mega Man X2 and X3 use the CX4 coprocessor. Support will probably not be added for the forseeable future (though, looking at bsnes's source, I see no reason why it couldn't be).