Dreamcast-Talk.com

I'm not so sure how to properly explain this, I've been simply unable to play any copy of Shenmue I via my GDEmu. In the past it would play but only very recently has it been an issue, going into the Music section of the BIOS it appears as a generic unlabeled disc and the warning audio track plays but it doesn't properly boot into the game (If I attempt to it stays stuck at the "Product of or licensed by Sega" screen).

This happens with the version from the collection here on DC-talk, redump, tosec versions too. I'm completely stumped.