It's kind of fun to imagine "what if" in these situations. Like, what would it take for such a box to be real? It doesn't seem all that far off from a low pin

It's kind of fun to imagine "what if" in these situations. Like, what would it take for such a box to be real? It doesn't seem all that far off from a low pin count bus, or from a modern game console mod chips that spike the voltage outside normal ranges at just the right time. You could extend that idea and wonder if a single contact would be sufficient, given the right out-of-spec, no holds barred, analog waveform, to both read from and write to an arbitrary circuit. Maybe the single contact is just for establishing a common ground level, and all the magic happens with ultra-high-angular-resolution wireless beamforming. Like, just imagine what you could do with a bidirectional 2D beamforming array with the same resolution as a cell phone camera sensor.