The Ware for May 2026 is, in FETguy’s words: “one of many large pc boards of a Rodgers Instrument Co church organ. The core memory was used to store and recall settings of the organ’s “stops”. There were 5 core memory boards in this instrument which differ in how many words were implemented. I photographed the largest one, which has 19 x 10 bit words, of which one is a spare, and then another word, I guess also spare, with no corresponding drive circuitry populated. So, 200 cores of which 180 were actually used.”

Here’s the unredacted version of the ware – includes a patent number which has more details about how it works. I love the design-for-repair, self-documenting nature of this board!

Nobody quite guessed the true nature of the ware, so this month there’s just a solution and no prize.

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