FYI The only reason any Doom port would need an FPU is because it lacks the 030’s 32x32->64bit integer multiplication and the author is instead using the FPU to perform this in floating point and convert back to fixed point right after. I can probably produce an 060 optimized version that is not usi...

My low tec solution using a SDCard extender

https://www.nxp.com/docs/en/product-change-notice/PCNR00283.html https://www.nxp.com/docs/en/product-change-notice/PCNR00321.html I think at some point they just consolidated manufacturing of all 030 chips to 0.8um, yet still sold them at different price points. Could also be due to testing - its a ...

If we believe this info http://www.cpu-world.com/CPUs/68030/Mot ... RC50C.html

Then those chips labeled RP25C are using a mask (0G40W) used for 50Mhz MC68030RC50C chips

Glad it worked out for you!
Mine look exactly the same - date code and all.

The TurricanII fluctuations don't seem to happen on my TF530.

I can confirm the TurricanII speed fluctuations.

Battle Chess gets the CPU quite toasty. To stress the CPU you’ll want to use software that interacts with the chipset very little, so the TF has little time to step down to 7MHz.
I guess, using Lha on many big files would be a good test, too, to stress CPU and IDE.

I guess I was lucky with these: https://www.ebay.com/itm/1PCS-5PCS-MC68030RP33B-MC68030RP33-68030RP33B-33MHz-PGA-Microcontroller-IC/293148971526?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Have an MMU and work @50Mhz in TF530/536. They all look brand new and carry identical text o...

I think I resolved it to a PEBCAK. :oops: When I ran it on the TF536, F1GPEd had patched the executable to an unrealistic framerate. Apparently there are some hardcoded assumptions in F1GP about how fast it can render and how much wallclock time that will take. If you feed F1GPEd with a too high fra...