I have so much fun with my PiDP-11 that this will have to go on the list.
Does anyone know if MIDAS has been recreated for it or not?
A bit of the hint on the PPT reader, which would be awesome, the rp2xxx chips PIO can handle that with ease. As the PDP1 doesn't have take-up it is pretty trivial to make at 'historic' speeds. Obviously punching is much more difficult.
I looked into it for quite a bit, but not having access to tapes, puncher, supplies etc... I gave up on the idea as the PiDP-10 will scratch my personal nostalgia itch a bit more right now.