Bankswitching is simple, and Goroh and Firebug agree, but on IRQs Firebug's doc looks bad, so I used Goroh's, and it locks up at the beginning. It's probable that I've misunderstood what goroh says, so before I try to look at the code of the game, my question is : is there some more recent and precise doc on VRC6 ? (Horton's doc only deals with sound)

PS : without IRQs it works, with garbage graphics in-game of course. (and black screens during the intro, apart from the yellow stuff left and right)