File | .gdi

Sega Dreamcast GD-ROM images are most commonly using the GDI file format. Example GDI taken from Crazy Taxi: 3 1 0 4 2352 track01. dreamcast.wiki

: A small text file (usually just a few KB) listing the tracks. Multiple .bin or .iso files : The actual game data tracks. .gdi file

A utility or emulator function that performs "Smart Re-indexing & Shrinking" with a single click. Sega Dreamcast GD-ROM images are most commonly using