A True Telnet BBS on a Casio Calculator

A True Telnet BBS on a Casio Calculator

A developer fell in love with Casio pocket computers after discovering their BASIC and RS232 capabilities. He built a fully functional telnet BBS hosted entirely on a Casio VX-4 with just 8KB of RAM, using a Raspberry Pi Zero W only as a network bridge and message archive. The BBS, written in BASIC, accepts calls via telnet and prompts for a callsign. The project is still in development, with plans to publish the code on GitHub.

How about a Bulletin Board Service? How original you might say. Yes, but how about a BBS hosted entirely on a calculator with 8kb of RAM?
  1. rglover

    Just reminded me of my favorite toy as a kid, the IR-7000 [1]. I convinced myself I was Ethan Hunt riding around on my bike with it in my pocket.

    Cool to see this working.

    [1] https://segaretro.org/IR_7000_Communicator

  2. nizmow

    I love this, but feedback to the author: the combination of a quirky font and quirky colours make this incredibly hard to read.

  3. codazoda

    I really enjoy this format. Like reading a story from the authors life. Like you might read in an autobiography.

    I don’t think I write this way very often, but I enjoyed reading it.

    My takeaway is to write a bit like a journal more often.

More from this day

2026-08-16