I saw a diagram of the SKTOCC just goes into a logic circuit. There will be no power on if circuit is not pulled low. (I soldered a small wire to ground at test point of pin 102 of my Nuvoton chip).
I took a BIOS from a success post on here Finished Z270 Killer SLI/ac Coffeelake mod . Used Coffeetime to inject my MAC and update some of the patches, then flashed on my ASRock Z270 Killer/AC. Now stable with i7 8700.
I used a Pi Pico W board with a serprog .uf2 and a windows version of the flashrom utility. It’s a lot slower than the CH341A, but I feel like it’s also a lot more stable and safer. I just used jumper wires to connect it to the clip adaptor for my blown up CH341A.
It will only boot with 2400 or slower RAM. I was able to get some Patriot JEDEC 2133/XMP 3200 ram to work, I enabled XMP 2.0, set speed to 2666, and timing 16 16 16 32 (instead of 16 18 18 36). Oddly enough with my fiddling I lost my all-core enhancement 4.5ghz, but I set 125/179W power and CPU-Z is showing faster all-core than an 8700K! (According to the built in comparison tool). I’m only drawing 100w on old Throttlestop doing the built in 64MB stress test.
Pretty happy with the result. Saved a used i7 and an old motherboard in one go.
I got it to boot on a Pentium G5400T. I didn’t mask the 2 pins, just let them burn. Then pushed what was left down into the socket so it couldn’t touch any other pins. Now I don’t have to mask or connect any pins to swap processors again!