Going out for 20 more Storage Module replacement boards today. All 5 of the first run work with one timing change, and different values for 12 resistors.

Over the last week or so, I have fixed all the bad PS and PZ modules that I had previously identified. The machine has been running with all those replacement modules, as the first 5 PP’s for more than a week now.

It’ll take a week to fab the boards, and a week or two to do the surface mount assembly, then David Cameron and I will install the connector pins, and pulse transformers. Then I will be off to fix¬†the other half of the memory to bring the machine up to his full 128K words.