Computer-generated dream world: Virtual reality for a 286 processor

I've seen a similar project a while ago and thought this was about the same thing at first: [1][2]

Both essentially built a DIY chip tester for a 286 and both built around a Harris 80C286.

If I understood it correctly, the goal behind this project seems simulating the rest of the PC, purely for the challenge and learning experience, documenting the process of building the chip tester (and getting mildly philosophical in the process).

The other project was more directly interested in the 286 itself, undocumented instructions, corner cases in segmentation behavior, instruction cycle timing, etc. and also trying to find out if there are any difference between the Harris and Intel variants.

[1] https://forum.vcfed.org/index.php?threads/286-cpu-experiment...

[2] https://github.com/dbalsom/arduinoX86

Looking at the amount of wires going into this, my instinct is that this cannot scale, in 5-10 years this won't be doable for a Pentium chip, at least not as an at home hobby project. But I actually think it could go the other way, and in 5-10 years you'll be able to do this at home for far more sophisticated kit, unlocking crazy amounts of reverse engineering possibilities that were once thought of as near impossible, or at least only possible for a nation state scale setup.

Cool! But the wires!

I'm not a fan of breadboards, they tend to be unreliable even for trivial circuits. We need something more affordable and practical for home PCBs[^1]. Why is it that nobody has invented a tin 3D printer, or at least a 2D version of it, i.e. a tin plotter?

[^1]: I'm discouraged from home-etching by the chemicals and the dark-room part of the process.

Here's a project that also does this to ensure cycle-accuracy for their emulator: https://github.com/dbalsom/arduinoX86

So they're stepping a 286 very slowly and sorta... bit-banging the I/O pins on it?

Love it. No notes.

[dead]