alexh wrote:
You cannot just "Change the clock rate" and expect anything to work. The sample frequencies for audio and the TV frequencies for video are fixed!
Of course not. The C64 is a fine tuned piece of machinery. That's why I suggested that he try it with an emulator first so he can see the consequences

I guess, theoretically, if you *only* accellerate the CPU (say, you end up with a 100MHz 6510) you will probably be able to do _some_ things, but I suppose you can forget about games and demos that rely very much on the instruction timing.