Looking through all my Dreamcast discs of roms, varying every system from NES, SNES, Gameboy, Gameboy Color etc.. I recall that there is one.. DarcDC, BUT.. It's not exactly playable if I remember right. ( There was some reason why I never burned it to a CD ) Something bout the sound and games loading up rarely etc. A bit a disappointment being I'm kinda big on the Ys games and wanted to play Book 1 and Book 2 again.
If you happened to try the DreamSNES for the DC and remember how the games play around 50-80% of the game's actual speed, that's bout how it happens with this disc too.
There is some hope though, I'd check out Dream Engine, while it does happent o play the speeds better, from like 80% to perfect, it lacks sound. If that bothers you, you may be out of luck unless you look for an emulator for the PC. But if not, then that'll be the best you can get most likely.
The other bad news? It hasn't been updated in a few years, so that's probably going to be the last verison that comes out so we can't really expect it to get any better. :bawling:
But.. It is a good place to start. Hope this helps.