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I turned a Raspberry Pi into a speed tracker, and now I know exactly when my ISP is lying

A few speed tests over a week revealed an unexpected problem.
Hackaday

PicoZ80 Is A Drop-in Replacement For Everyone’s Favorite Zilog CPU

The Z80 has been gone a couple of years now, but it’s very much not forgotten. Still, the day when new-old-stock and salvaged ...