So, this isn’t exactly retrocomputing and it looks like it’s from four years ago, but I just found it and thought that many here may find it interesting.
This guy built a simple 8-bit CPU out of essentially discrete logic circuits (from what I’ve see so far, nothing more complex than a 4-bit adder chip) and explained the entire process.
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Hmm, I can’t remember now if I’ve linked the guy doing his own semiconductor etching in his garage. I definitely have elsewhere, and that’s kind of similar.
Just in case: Sam Zeloof
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He built his first etching setup when in high school, after graduating college a few years ago, he ended up starting a company with Jim Keller, the coauthor of x86-64
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Ah, he has a Wikipedia page now!
