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Hacker News front page2 min readintermediate

A restored PDP-11/83 serving this page on 211BSD Unix

Read on pdp1173.comHN 92·38 comments

Summary

A hobbyist restored a Mentec M11‑based PDP‑11/83 running 2.11BSD, exposing a live status panel that shows CPU, memory, bus, storage, and networking activity while serving this web page.

  • The M11 board integrates CPU and RAM, simplifying the classic PDP‑11 architecture.
  • MSCP controllers provide a uniform interface for both disk and tape devices on the Q‑bus.
  • A small HTTP server runs on a 16‑bit UNIX kernel, with a front‑end cache that updates every 5 seconds.
  • Boot can be performed from MSCP disks or an RL02 tape image, with regular backups to tape.

Shows that legacy 16‑bit UNIX systems can still be made operational and network‑connected, offering a tangible platform for studying early OS design, low‑level driver development, and hardware‑software co‑design.

4/10
storagearchitecturenetworkingsystems programmingunix

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