> Which bus does this deal with? Is this the Explorer private bus, or is > it some kind of memory-mapped IO-Space like the PDP-11 has? > > Effectively, everything is NuBus; E1 had a local bus to memory, but > that was just for speed and I'm not sure if E2 even used it. Real E2's (rather than upgraded E1's which most of ours were), didn't have the local bus. Steve