Could 74xx logic run Linux?

Why not? I’ve already built something that could be considered a computer. It can’t run native code besides what is on its ROM, so it can’t run a conventional operating system, but it seems like its flaws could be easily rectified. Maybe a bigger 32-bit processor with more registers and a bigger address width could run an operating system. It could, kind of, but a real computer has a more features that are necessary to run an operating system.

A Radio Clock

Design files and code I found this King KI 266 DME Indicator, part of a 1970s DME radio navigation system that would have been mounted in an airplane cockpit. I only have the display part, so unfortunately I won’t be able to use it to navigate, but it does have two awesome gas-discharge seven-segment Panaplex displays. These types of displays operate similar to Nixie tubes (high voltage makes the neon glow), but each cathode is a segment instead of an entire number.
Choices, choices… There are lots of ways to do digital logic. I choice NMOS because I wanted to. For the N-channel MOSFETs, I chose 2N7002 in SOT-23 because it was the cheapest. I ended up with 9.1k pullup resistors and 12V supply because it was convenient and seemed to be a reasonable speed compromise (a few hundred ns switching time / 16mW static power). Parts are $0.032/inverter at quanity and cover about 20mm² of board area in 0805/SOT-23.
Git repository Overview VMP is a processor. A very mediocre one. It’s an 8/16-bit Harvard architecture RISC CPU built with 1565 discrete transistors. It can runs at about 30,000 instructions/second, consuming approximately 8W (similar to my entire laptop idling at a few gigahertz). The actual VMP CPU is the stack of boards in the middle of the photo. To the left is a standard IDE hard drive from an old desktop.