A small text file (similar to a .CUE sheet) that lists the tracks and tells the emulator or ODE how to read them.
If you want the most authentic experience, . Understanding The Dreamcast GD-ROM Layout - Multimedia.cx Dreamcast Roms Gdi
Note: This write-up is for educational and preservation purposes. Always support official re-releases when available—many Dreamcast classics are now on Steam, Switch, PlayStation, and Xbox. A small text file (similar to a
A GDI (Gigabyte Disc Image) is a of an original Dreamcast GD-ROM. While standard CDs of that era held ~700MB, Sega's proprietary GD-ROMs held roughly 1.2GB . Dreamcast Roms Gdi