slingshot wrote:But do you think reconfigurable PLL is working on Cyclone III?
Have yet to actually try to use it. But the megawizard lets me pick one for Cyclone III. So i think it works...
If you can figure out how it works in one core, I can adapt it to the other
As I see, it needs an existing PLL's output for the input clock, then put some magic numbers into it, then you can get something on the output clock.
Hmmm ... good point. I wonder how big the differences are. I'd assume they are only a few bytes so one could try to patch those on the fly.
Would be not that big, since you can switch modes via 3 numbers in the monitor (just different values for a TED register). However if you switch ROMs (like to Jiffy), probably another place must be patched. Or move ROMs to SDRAM, the loader is already there for prgs. But then no built-in ROMs are possible (not a big problem I think).
About the clocks I wonder what if the same frequencies are used in C16 for both modes, the difference is so small.