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TIL my ZX81 doesn’t even have enough RAM to map a single Linux memory page even before all the memory mapping overhead.

Good enough start for today. I decided against making it reversible seeing as this is my first real PCB. Should be able to take two of these and daisy-chain them for a full ZX81 keyboard map.

I think I'm going to add some mounting holes, some decorative silk-screen and then send them off to get fabbed. Then all I need to do is buy some headers and PCB mount switches, desolder the shitty ZX81 keyboard connector from the motherboard and it should be all ready to build when it arrives.

Then I can figure out how the hell I'm going to mount the thing!

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