https://www.youtube.com/watch?v=YR9E9ZvHkQE Usagi Electric has acquired Data 620 which was a fully transistorized minicomputer built 1965/1966, was very likely part of the Moon landing project.
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Notably, Data Machines was a division of Decision Control, Inc. (DCI), which became Varian – and with this the Data 620i became the Varian 620i. It’s under this latter designation that we find documentation and even some paper tape images at Bitsavers:
I am certain the Usagi folks would be happy for any schematics.
There are some schematics in the July 1969 maintenance manuall but, it seems, at this point it had been repacked into a more DEC-like form factor. No idea what that may mean for the various cards and backplanes.
(I posted the hint to Bitsavers as a comment to the video, and I’m quite certain that they’ve seen it.)
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