Homemade Computer from 1970s Chips — Hackaday
Sometimes it starts with a 555 timer and an op-amp. Other times with a small microcontroller. But the timing’s not so great and needs a dedicated timing crystal circuit. And maybe some more memory, and maybe the ATtiny should be swapped out for some 74LS-series chips. And now of course it needs video output too. […] via Homemade Computer from 1970s Chips — Hackaday
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