| Format | Pros | Cons | |--------|------|------| | .gdi + .bin | Original, 100% accuracy | Large file size | | .chd | Lossless, smaller than GDI | Slightly slower load in some emus | | .cdi | Burn to CD-R, old-school | Dummy data / trimmed, possible issues | | .cue + .bin | Common, playable | Less accurate than GDI | | .m3u | Playlists for multi-disc games | No game data, just indexing |
You can find these on , DCEmulation.org , or itch.io (filter by Dreamcast platform). sega dreamcast roms