CWP Article #4: Atari-Based BBSes Were Routine

Atari 8-bit systems routinely served as full BBS hosts. With an Atari 835 direct-connect SIO modem at 300 baud, sysops answered calls, prompted for credentials, and stored messages—no 850 interface needed. WPA is the natural application of this stack to listings and exchanges.

What was common on Atari BBSes

SIO modem control: Atari 835 direct-connect over SIO at 300 baud.
Dial/answer via software: BASIC/handlers driving the 835 for AT-style control and call flow.
User flows: login prompts, message bases, simple file/listing records.

Conclusion

Given Atari’s established BBS footprint, an Atari-hosted WPA in 1981 follows directly from mainstream practice.