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@Wintermute_BBS nice, how did you do it? Write your own telnet server?
@PaulaMaddox no, it's all CP/M and Zilog Z80 (8-bit) based. No Linux host or custom code involved.
It simply utilizes a WiFi modem with Zimodem firmware to connect to the outside world. 📡 This is where you telnet into.
The WiFi modem is connected to the SIO/2 serial I/O port of the RC2014 at a whooping 9600 bps and BYE.COM on CP/M then handles the incoming serial connection ... the modem also takes care of the "single-user" handling by only allowing one telnet connection at a time. So if someone is already connected, you will only get a "BBS busy" message and be disconnected.
You can read about how it's done in detail on the BBS itself, in the text files section ("A brief history of RC-BOX BBS"). And I blogged about it here:
@Wintermute_BBS cool. When I get a telnet client working on my 6502 I’ll connect to it :)
@PaulaMaddox you're welcome! 👍