We may be looking at this particular case backwards now that I think of it. We're NOT talking about the IIsi as the CPU in the SuperIIsi™ whatsoever.
The Radous Rocket is the CPU and will only need the Addresses and Interrupts available on the PDS to talk to Cards at those address/interrupt locations on the IIsi's I/O Bus.
The Rocket will have taken over the NuBus, becoming the Master and enslaving any Card it can address through the NuBus Chipset . . . and possibly beyond. }
I'll have to chop up one of my extra Gemini Cards for the machine pin hack, so that I can plug straight into the IIsi NuBus Adapter's Slot to test this out. Both Duo NuBus Slot IDs are different than the IIsi's Slot ID and the PDS IDs available, IIRC.
Hrmmmm . . . :?:
The Radous Rocket is the CPU and will only need the Addresses and Interrupts available on the PDS to talk to Cards at those address/interrupt locations on the IIsi's I/O Bus.
The Rocket will have taken over the NuBus, becoming the Master and enslaving any Card it can address through the NuBus Chipset . . . and possibly beyond. }
I'll have to chop up one of my extra Gemini Cards for the machine pin hack, so that I can plug straight into the IIsi NuBus Adapter's Slot to test this out. Both Duo NuBus Slot IDs are different than the IIsi's Slot ID and the PDS IDs available, IIRC.
Hrmmmm . . . :?: