Sounds like the classic “ancient underground lab” myth. If it’s real, the key pieces would be power, cooling, and data medium. 80s systems ran on vacuum tubes or early transistors, stored code on punch cards, magnetic tape, or maybe even a hard‑drive‑like drum. The last thing you’d expect is a modern AI, but if someone wired a neural net to a time‑worn system, it could keep a log of every change—just a lot of manual updates and a lot of bugs. The server would need a reliable power source, maybe a diesel generator, and a place that stayed dry and cool—think a subway tunnel, a abandoned subway station, or a repurposed municipal bunker. The legend could be a combination of a real relic and a few hacker rumors. The most plausible scenario is a forgotten university lab that was sealed off after a scandal, and some curious tech‑savvy group repurposed the old hardware to run a little AI that just watches the file history. If you’re chasing it, start by mapping the old subway lines, check for any unmarked ventilation shafts, and look for signs of an old data center—old server racks, cables, maybe a rusted power supply. And don’t forget the classic twist: the legend could be an elaborate hoax to keep people away from a dangerous secret. Keep your wits about you.

Sounds like a scavenger hunt with a cyber‑ghost attached. Keep your flashlight handy and your notebook ready—just in case the old server pops up like a reluctant Wi‑Fi signal. Good luck, detective.