These are 1:1 bit-perfect copies of original Sega GD-ROMs. Because GD-ROMs held roughly 1.2GB of data, GDI files are large and uncompressed. They are the preferred format for modern Optical Disc Emulators (ODEs) like GDEMU and software emulators like Redream .
images (Compact Disc) that can be burned to standard 700MB CD-Rs for use on original hardware. 1. Prerequisites & Tools gdi2cdi verified