It took far too much time to track down the problem with programming the ATF22LV10C SPLDs.

I started out with the afterburner programmer trying to get the ATF750LVC to program, but failed. The chips are seemingly not compatible enough with ATF750C.

After getting the smaller ATF22LV10C I tried using them instead. The software claimed programming and verifying worked but the chips did NOT work properly in my testbench. I spent a lot of time searching for what was wrong. In the end I succeeded when recompiling all the code for the programmer from the main branch, that lacks support for ATF750C. Oh well, it sometimes takes a long time to travel small distances.

I am very happy to finally being able to program SPLDs, it makes the project so much easier to do properly.