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Having no other resources, as a kid I sent Zilog a letter asking for a copy of their Z80 docs. Probably wrote it in crayon.

Bless them, they sent it, and that's how I got started learning microprocessor architecture.




I have the original Z80 programmer's quick reference around at home, still.

If I was smart enough to know how to post a photo to HN then I would do so :)


This makes me smile!


Me too. It was essentially this, albeit a very early version: http://www.z80.info/zip/z80cpu_um.pdf

May the gods help any kid that tries to learn Intel CPU architecture that way these days. :-)


"Well Johnny, the first thing to understand is how time travel works. You see, our CPUs guess at what you wanted to do next and start executing the pipeline before they know for sure, and sometimes it's wrong, and..."




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