Status so far:

1. prototype PCB now runs on the Pi, driven by a (slightly) modified version of the simh emulator.

2. critical concepts proven: that a real-time process on the Pi can drive the 92 leds/26 switches without additional ICs etc. That simh lends itself to low-overhead integration of GPIO registers to drive the front panel.

3. To do:

-- ensure switches behave exactly as on a real PDP-8/I.

-- Produce acrylic front panel from art work.

See Project blogspot page for further details and updates...