: Before downloading or acquiring ROMs, it's crucial to understand the legal landscape. Many ROMs are copyrighted by their respective owners. However, there's a growing movement towards game preservation, with some companies and organizations supporting the idea of ROMs for preservation purposes.

For NAOMI, this is complex. The system used various media formats, including GD-ROMs (Gigabyte Disc ROMs). A full set includes:

Often used for "GD-ROM" games. Many modern emulators prefer the .chd (Compressed Hunks of Data) format for larger disc-based games, as it preserves the original data structure while saving space. 2. Essential BIOS Files