It's already out since July, but just to log the improvements:
- There's actually a lot to learn about kit-making: how to prevent beginners from messing up soldering a computer kit for the first time. So it was time for a revamp of the PiDP-8, putting in all those lessons. Easy to mount replica switches; a LED cover panel to quickly put in some 89 LEDs; but the PCB redesign actually took in most of the lessons-learned: when you don't know who is going to solder up your boards, better make wide traces, spaced far apart. Kits will be built with 450C soldering irons used by plumbers. And ensure you can diagnose problems over email. So. Bold statement... Anyone can build this kit now ;)
- The software got an update to run on the new Pi 4, although that's gross overkill if all you want is a PDP-8. The Pi Zero makes more sense. But most PiDP-8s serve other purposes in the background - file/web/media server and whatnot. Then, the Pi 4 is very nice. And it finally has the graphics oomph to run a picture-perfect CRT simulator for that glorious Serial Terminal feeling.
- The fancy vector graphics (spacewar, but also a 2019 fast-vector Game of Life) are now in and provide a nice fancy demo mode for all that 1960s 12-bit-power.
Nothing has changed in the looks of the PiDP-8 once it's completed. No need to get the hardware update if you already have one! But thank you for all the lessons I learned.
Now the race is on to kit #3000. Or, secret ambition, to one day reach kit #3841, because that's when there are finally more PiDP-8/I's than PDP-8/I's.