BigBoy has updated his site with more news concerning his Commodore 64 emulator for Dreamcast called DC64:

I’ve been making some progress with DC64, mostly removing old or unused code. Its sped up and down lots, but is currently stable in terms of speed. I have removed some features to keep the speed up, and this has led to some games being less than compatable, if things speed up again, these can be added back in, but for now, we’ll just have to live with it. The rendering is now as fast as its ever likely to get, and is fairly complete with HIRES, MCM, ECM, and Bitmap modes all being there. I still have a little work to do, but I hope to get a version out soon.

I’ll keep you all posted

http://classicgaming.dcemulation.org/