[swetland]

I've had a lot of fun with this project, but want to be clear that the actual "replicate the ZX81 using discrete 74xx logic (like the ZX80) instead of the ULA chip" PCB design is the work of Mahjongg2 who has shared their work here:

https://github.com/mahjongg2/ZX81plus38

https://forums.raspberrypi.com/viewtopic.php?t=254492

https://revspace.nl/ZX81plus38_simple_to_build_ZX-81_clone