CompuServe Messages

What main clock crystal? Don't all clocks get generated by alice? That was what I thought anyway ( the processor and video clocks definately are, others might come from the power supply which is also going to change anyway ). The only clocks that might need changing are built into the modulators aren't they? I would guess that the amiga could guess the correct screen mode from the power supply, but I reckon that it is probably jumpered. Phill