Originally Posted by Xebec
Hi Jens! - I assume there is no way to 'flash' an ACA1221 from Rev 1.2 to Rev 1.3? It's some kind of hardware difference? I wanted to try 42 mhz ever since I saw how you divided out the mhz to get 17, 21, 28.. Thanks
It's a combined CPLD and flash update. Both require special tools that the average user does not have, and I would not part with the required files :-)
You have probably read in the Wiki that not all 68020 CPUs can take that kind of overclocking. Also, it appears like the power supply has great influence on overclocking capabilities: Just 0.1V too much, and the CPU gets too hot to run at 42MHz, although the mask is right. Cooling is a "must", but it's very difficult with the CPU upside down and no mounting holes on the card.