Nascom-1. Back on the workbench – Part 3.

For a while now I’ve been trying, on and off, to get some progress on the Nascom.

The Nascom board on the bench

Thing have not been going particularly well since I last wrote a post about this nice but frustrating machine. I decided to remake some of the solder joints in case a dry joint had got worse but that didn’t help. Now I am working my way through the circuit diagram checking each joint to see if that gives me any clues.

The circuit print below shows that I have not got very far. I think the Nascom is going back on the “Shelf of good intentions” for a while.