additional issues (just to keep record):

* Super Soccer has a black screen when you have to select a team (but you can see somehow through the black the flags)

* any game using special chips (but DSP1-DSP2-OBC1) does not work [1]

[1] I had a partial DSP3/DSP4 implementation but: 1. I need permission from Nach to use ZSNES code (I'm already in contact with him, and he's basically ok... we just need to sort out details), 2. I haven't pushed too much for the permission because DSP3 is still buggy & Top Gear 3000 (DSP4) suffers of the same bug of Top Gear 2... However, both chips will come at a point...