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Note: This is not about the Z80 CPU. This is about the Z80-CTC ship: “The Z80-Counter Timer Circuit (CTC) is a programmable, four channel device that provides counting and timing functions for Ihe Z80-CPU.”

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PS: Similar product evaluations exist for a lot of components from the Z80 series, including the CPU. But only on paper, because they haven't been scanned: http://smithsonianchips.si.edu/ice/s3.htm Maybe you can convince the National Museum of American History's archivists to scan more of them.

You can request the documents and go photocopy them yourself at the museum. Or have their researchers do it for a fee.

Just don't bother with these as they've already been done: https://www.dropbox.com/sh/yqpc3bglatpmpvl/AACA2CXFv1XeA1ZmL...

Yes of course. It says so in the title: "Zilog Z80-CTC".

That's "of course" if you're already familiar with the Z80 and other hardware associated with it. To a reader who doesn't already know what the Z80-CTC is, though, it's not at all obvious that "Z80-CTC" doesn't denote some variant of the Z80 processor. I think teddyh's comment was useful, and I don't think it deserves the dismissive response you gave it.

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