Before people come at me; I mention that even the Pi Foundation doesn't design and build their own processors. I know that that they did design the RP 2040/2350 and some of the motherboard chips on the recent Pi designs. The system on chip is Broadcom, however.

The video is pretty blurry here; I'm not sure if the camera isn't focusing, or what. It's about fourteen years old, so maybe it's time for a change.

In 2019 I had a PDP-11/34A, RL01 disk drive, and VT-100 terminal in my office at work. A student and I managed to get Unix V6 booting on it. This little wordless vignette shows the boot sequence in real-time, plus a small amount of interaction at the prompt. Notice that I forget that V6 used chdir and type cd instead!

It contains a 1 MHz ovenized oscillator, and provides a number of features, from frequency counting to period timing to interval counting.

The serial protocol analyzer sends a string of U*, waits a few ms, sends CRLF, then waits a few ms, and repeats. This is because U and *, with 7-bit even parity, represent binary 01010101 and 10101010, so every bit is inverted with every character. This tends to show "sticky" bits.

The lighting is terrible because I'm in my garage, at night, with the top for my Jeep between me and the light. Sorry.

The model 35 is a rugged ASCII machine built on the same principles as the Model 28, but having functionality comparable to the better-known Model 33. The Model 33 was designed for intermittent duty in light commercial service, while the Model 35 was designed for always-on operation.

The lighting, audio, and camera work are all awful because I used my phone; pardon the quality and enjoy the demo!