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From my understanding, C= left the FPU off the motherboard because when an accelerator (alternate CPU) is placed in the trapdoor, the motherboard 68020 and any FPU with it are disabled. I think that will be the same in your case.
My accelerators deliberately do not attempt to use the A1200-onboard FPU, because this requires to also route the Bus error signal from the mainboard. However, some Gayle chips cause this signal to glitch around and crash the computer randomly. So the natural fix is to avoid looking at that signal, because random crashes is not what you want on a commercial product.
It's OK for open-source accelerators that have a number of other issues - they're slower per MHz, they do not optimize chip ram access the way we do, and it's OK for a DIY-thing to randomly crash. Not so for a commercial product 
The last reply was more than 365 days ago, this thread is most likely obsolete. It is recommended to create a new thread instead.
