Thanks tl and JDW. I did recently acquire a IIsi ROM off Ebay (first one I have seen in years of looking) and unfortunately it was a dud: http://68kmla.org/forums/viewtopic.php?f=7&t=10589

I don't suppose that anyone has an extra IIsi ROM that they would be willing to trade for a IIfx ROM?? I have one of these already and and another on the way in a IIfx motherboard that I won last week.

Also, I did try the Carrera040 card with the IIfx ROM in another SE/30 and it didn't work...