* In a message originally to John Dailey, Stephen Hurd said:

 SH> A signal can be thought of as a programmable software interrupt... a HUP
 SH> signal (For Hang UP) is a "User has disconnected" interrupt.

Yup, familiar with software interrupts.  My question was really: is it
something the BBS is triggering, or does the door have to poll regularly to
find out if it has occurred?  My guess is that the BBS or the hardware
triggers it.


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