Some years ago I created a schematic for it in Protel, and made a PCB. The PCB wasn't particularly accurate, as I mainly just threw the autorouter at it. So (probably) functional, but not particularly exciting.
Success at getting KiCad to do beautiful curved traces reignited the spark of that particular project, so I pulled out the files and had another look.
So now the next step. Trace over the image in KiCad using proper components, tracks (15 mil) and vias. It takes a while, but it's enjoyable bead therapy work. There's no need to accurately follow the original. Indeed around corners it's better to leave the round the corners plug in to do it neatly.
This makes a real board, that can be DRC checked against a netlist (when I get around to putting the schematic into KiCad), to ensure that it's correct. Finally, run the board through the round the tracks plugin to smooth things out and create absolutely stunning artwork, even better than that used to make these computers in the first place.
Anyway, I fixed the obvious things, and mainly made the schematic agree with the PCB where it didn't matter (swapped designators, swapped pins).
So here's the final glorious thing, in a form that I can get one made. 15 thou tracks and 9 thou spaces (I know, very assymetrical). Totally ready to build.