Here's how to run multiple NuBus CPU boards in a Cube - it requires some modifications to the backplane: https://wiki.preterhuman.net/NeXTcube_running_68030_and

Here's how to run multiple NuBus CPU boards in a Cube - it requires some modifications to the backplane: https://wiki.preterhuman.net/NeXTcube_running_68030_and_68040_boards https://wiki.preterhuman.net/NeXTcube_running_68030_and_6804... The additional boards were netbooted via bootp/tftp, so the additional boards could run the same kernel as the one the hard disk (and/or MO drive) was connected to. Of course, this is a distributed memory machine - not much different than running three diskless Cubes booting from a fourth machine.