Upcoming #retrocomputing project: update my trusty #ts1000. 1st up is the modern power converter, then Composite Mod (green PCB). Then upgrade onboard RAM to 16k. Finally, 'cause it needs to be #fancy, swap out the CPU socket for a #gold one :D. And then give the little unit a modern Z80 that'll use less power, etc.

And if the ULA has gotten bad, I'll order one of those fancy-new #vLA81 ULA replacement boards.

Docs & videos out there for the #zx81 - they'll work fine for this little unit.