On Fri, 22 Jun 2007, Al Kossow wrote: >> For the Q-bus, I don't even know if any core memories exist. > There was a 4k quad board for the original 11/03, but that was > long dead by the time the T11 came out. I have a 11/03 with two 4k core memory boards. It also has a QBus->Unibus converter for a RK11D. Christian