I’m using a romset for PC-Engine / Turbografx-16 games, and inside the folder I have a “Supergrafx” folder with roms too. I noticed that every rom in the Supergrafx folder work, but a lot of roms from the Turbografx folder don’t work, they just display a black screen. I tried with both Mednafen PCE-Fast and Mednafen Supergrafx cores. PC-Engine CD games also work, I have the correct Bios files. Any idea ?
Edit for clarification : All games in the “Supergrafx” folder work with the Supergrafx core, but a lot of games in the Turbografx folder don’t launch at all (black screen) with the PCE-Fast core.