alt Hacker NewsThis makes me wish I took photos of Diversi-Dial (aka D-Dial) setups, which somehow impressed me more due to how much they accomplished with much much less hardware.
They were able to set up a 7 x 300baud modems in real-time chat system on an Apple ][ . The original marketing called it a CB (Citizens Band) Simulator. They were able to run up to 1200baud, but I never saw one of those functioning.
As if 7 people chatting through a single 6502 wasn't impressive enough, many of them dedicated one or two of their lines to interlinking with other D-dials.
Talk about an esoteric memory.
- https://www.ddial.com/ - https://en.wikipedia.org/wiki/Diversi-Dial
And the larger ddial sysops would daisy chain multiple Apple IIes together. A connector would take up one port on each machine. Two machine would give you 12 modems. Each new machine after the second would add space for 5 modems (-1 on old machine, +6 on new machine). For the sysop it was a big investment for very little, if any, monetary reward. I remember a user account would cost $5 a month.
Our ddial was a few towns away so we bought a line in the exchange in between that would forward to the ddial. This way we would not pay a bunch on long distance calls.