Yep. If the FPU is just sat there most of the time "idling" at 64Mhz not really doing anything.. But then does something complex like division which would need a lot of clock cycles which could heat it up to the point of failing. Again I would be assuming that the fractal program would be hammering the FPU like crazy, but it's also being stalled by the CPU programming it more slowly, So it could be enough to tip the balance.
Yeah this is what we need to rule out. If the FPU fails the FPU test program running 50Mhz (or whatever) with the stock 16Mhz CPU.. It is pretty much case closed.Badwolf wrote: ↑Thu Dec 02, 2021 1:27 pm I've had some really funky results with different programs and different combinations. I think I need to gate AS, DS and the DSACKx lines -- even if it costs some cycles -- as I don't want to be introducing artefacts with my CPU clock switching nor my HIGHZ switching.
I guess another test if it does still work, just heat it up and see if the tests failing match what you are seeing fail with your accelerator. It may give some clues.