soundbank is smaller than $10000 in size, so it fits in one single bank.

Musical theme rearranged and some fun animations have been added ;)

I removed a branch present in bios, so both ports are read in one single vblank interrupt.
detectMouse() is called later, after nmi, so mouse is detected. snes_mouse is set to 0 when both mouses are not found, not the second one, this is to prevent potential issues.