How the ZX80 works blog.tynemouthsoftware.co.uk

Submitted by mike in retrocomputing

"Well, the first thing to know about the ZX80 is that, unlike most other computers, it's main job is not to run your code. That's very much a side task. The thing it spends most of it's time doing is drawing a picture on the TV screen. And it does that be executing mainly NOP instructions."

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