Just gave it a shot. This is amazing! I'm on linux (easier drivers!) and I love that I can now use multirom again! Some suggestions I had were:
Any way you could make the multirom part work without a copy of LSDJ in the rom? It seems like most of the code is already there. I'd just like to be able to fit more stuff onto bank 2.
Ability to return back to the menu via some kind of button combo? This isn't a big deal I just thought it would be cool.
Anyways, this is awesome, thank you so much! I wish I was a gameboy genius like you!