Sorry for the luck of Updates. Real Life, work and ST-V are keeping me very busy.
I think I know how to solve the issue of black screen in some games and will get back very soon. Also I have almost ready conversion of driving games.
Btw. I just got 3 new Taito F3 cartridges....I can't stop thinking how nice would be a Multi-Game cartridge for this system. Probably many things can be "recycled" from STV projects :)