A couple of Stern MPU-100 boards came in for service. Both with similar corrosion damage which required significant abatement. Once the corrosion was dealt with, the boards were repopulated.


A couple of small mods were done, too. Batteries and RAM were replaced with NVRAM modules from Tangles Pin Parts. A nice product from an Aussie supplier. One of the ROM chips was damaged on the Stars board, so I combined the two 2716 ROM images into a single 2764. Some modding of the board was required to accommodate the 2764 but it works well.


Before and after photos of one of the boards below!