Added support for Sunsoft-01 and Konami VRC2 and VRC4 mappers (#21,22,23,25).
VRC4 is still not quite correct... status bar flickers in Parodius, but Gradius II, the Japanese version of Contra, and Bio Miracle Bokutte Opa all work fine.
Made sound keep playing while fast forwarding
Rewrote all the frame limiter code again (need to test on a slower machine with XP)
Improved performance by making sure that I wasn´t regenerating the entire tile cache every time the game wrote to the mapper, even if the tiles didn´t change.