Universal System 3 CDROM Bios card

This is a universal system 3 bios card used to initialize the cdrom drive on the Turbografx 16 or PC Engine consoles.

it has an additional 2mb of memory on board for development.

Plays up to Super CD games and is based on the open source CD Stupid project by Osman D. Celimli.

not required for newer consoles like the Analogue Duo or Polymega.