Some take the emulation route, but others demand a solution that’s closer to the original hardware. Following the latter path, [iNimbleSloth] is answering the question as to whether it’s possible to build a Sinclair ZX81 from all-new parts in 2022.
From here in 2022 the original Ferranti ULA chip that contained all the logic is unobtainable except by raiding another ’81, so he’s using a design that has the same functionality in 74 series logic. The PCB is the same size as the original, and he’s paired it with a keyboard PCB using tactile switches. The video below the break is the first of what is to be a series, and he will be looking at a readily available 3D printed ZX81 case and the re-manufactured membrane keyboard.
I wouldn’t really want to use a ZX81 today (what would it even connect to) but I have a pretty fond place in my heart for the ZX81 as it was the first computer that I actually bought, and of course I had to type all the BASIC code (or sometimes hex code) in to actually play anything on it. That automatically exposed you to ideas about hacking code.
See https://hackaday.com/2022/11/10/building-a-sinclair-zx81-in-2022-with-all-new-parts/
#technology #retro #ZX81 #Sinclair