I have fixed banking problem with games 15-20

[Linked Image from mamedev.emulab.it] [Linked Image from mamedev.emulab.it]

it remains to understand why Spartan X and Battle Tank have issues and why there is no music (for the latter I suspect there might still be some small banking problem, but it's hard to tell, since I was not sure where the music data is in the cart)... but for now I'm done with these pirate carts. if someone wants to take a look, be my guest smile