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I came across this book when I was studying Mechanical Engineering in university back in the '80s. I was so engrossed by the book that I used it to build my own "ZAP" computer at home AND then switched to Computer Engineering the following year! It is a book that literally changed my life. Thanks, Steve.
The book for homebrew z80 micro computer builders, or old school soldering iron hackers in general. I read and re-read this, even the power supply stuff is comprehensive (though I'd tend to use a bought power supply these days and regulate it to correct voltage. The digital logic and chip interfacing are clearly explained, so is the z80's workings. I Don't remember much about the o/s code, was well into forth so that's what I was going to shoehorn in. Wire wrapped the z80 computer, could not get the eprom burnt correctly though. My electronics case got chucked out by a mother in law... such is life. Now a research computer scientist (me not the mother in law). lool, thanks Steve.