May I have a question? What should be the best or surest way to fast and easily (in only a few steps) distinguish the MEGA65 from C65?
I have done it in my code by switching to VIC-IV mode, then switching back to VIC-II mode, and comparing if some special registers (like $d031) change their values according to this (since they must be hidden for the VIC-II and normally just contain $ff there).
But now (if Miro's test was done on a MEGA65) this method does not seem to work.
Also, I thought the intruction set and timing were changed for C64 mode. But then they should be 6510 and 0.93 MHz (instead of those 4510 and 1.13 MHz).