Not a clue! There must be something else it can do at runtime to identify which model it's running on. That might be an interesting section of code to disassemble.
I wonder if it will still identify as an SE/30 when put in an SE/30?
Ooh, tricky! So you're trying to open up the ability to use more than 1 NuBus slot? I hope it works!
The only thing that kind of troubles me is that the only successful combinations I've seen so far are newer ROMs running on older hardware, but the IIsi is newer than the IIfx. I sure hope the IIfx ROM in IIsi idea works though!
