I'm having issues getting certain games running in retroarch, Namely Nexzr, Pop'n Magic and Mugen Senshi Valis - Legend of a Fantasm Soldier. All of the other CD based games I have tried (so far) work well. These games do start up and show a company logo then go to a screen which I believe is an error screen. Anyone with these issues know how to resolve them?
For more info I have the the bios and have followed the latest LB tutorial that was just released .