I can't post the download link here for obvious reasons, but it is real.
[Youtube]https://www.youtube.com/watch?v=3j8Ix3P3yxc[/Youtube]
[Youtube]https://www.youtube.com/watch?v=g8o8zaerozg[/Youtube]
[Youtube]https://www.youtube.com/watch?v=T5DYIM-UJXg[/Youtube]
[Youtube]https://www.youtube.com/watch?v=5DMmco3GdH8[/Youtube]
It's still not as good as the PS2, PSP and 3DS versions, but it's amazing to see Super Mario 64 running on Dreamcast with great speed.