Folkert van Heusden has added Teensy 4.1 support to a microcontroller-focused PDP11/70 emulator.

The system is capable of running UNIX 5 with disk, tape, and serial support, plus 4MB of RAM, an MMU (memory management unit) and high-performance 16-bit 11/70 CPU. It takes around a minute to boot, though can create snapshots for resumption of previous sessions. Teensy 4.1 Ethernet is supported, and a simulated front panel provides plenty of lovely (and functional!) blinkenlights.

More information can be found on the project’s web page, and the source is on GitHub. You can also reach an instance of the software via telnet on pdp.komputilo.nl (username: guest), and via HTTP at http://pdp.komputilo.nl:8080/