Treasure hunt victory. Just found a DEC F-11 CPU from Shenzhen. The second-generation of LSI-11, PDP-11 on a chip.

@roytam1 J-11 has extensive chip-level documentation, but F-11 is more difficult, I only found system-level documentation and schematics for the KDF-11 CPU board. If I cannot find anything better, it's necessary to work backward from schematics.

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@roytam1 Yep, I saw that one too. Need to do some "reverse-engineering" (in quote marks) from the schematics.

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