Work on reproduction of this PCB card nearing the end of the CAD phase. I’ve gone through numerous design checks and think that if I had a card made with the current CAD files that I most likely will have all the connections correctly made.

I’m currently going through a final pass of making sure alignment of reproduction traces matches with the original. Though I am close to finalizing those changes, close inspection is still revealing a few adjustments that will improve fidelity to the original design.

Once I get to the point that I can’t find any more tweaks to make, I’ll pull the trigger on getting a small batch of boards made. I expect very limited demand, so this will most likely be the only batch that I make.

I’ve also created modified schematics that includes part identifiers that match what I’ve done in my CAD program. The original Digital Group schematics do not include any part identifiers. Here is what the board with identifiers currently looks like in my CAD file. Note that chip orientation is not consistent on this board, so anyone building one of these will have to work carefully to make sure chips are not inserted backwards.