How the ZX Spectrum Keyboard Works - Deep Dive

Today we are going to learn how the famous rubber keyboard from the ZX Spectrum 48K works, and use that knowledge to reverse engineer a joystick interface I found in a box.

I hope you like PCBs, logic, machine code and Speccys as much as I do!

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Видео How the ZX Spectrum Keyboard Works - Deep Dive канала Happy Little Diodes