[aprssig] APRS bit I/O

[Robert Bruninga]

> > In the early days I used to peek and poke in the commodore
64.
>
> you can.  You need some I/O with digital outputs like a
parallel
> printer port or specifically some sort of digital I/O board.
> Another way to play with I/O in this manner is to use the
> handshaking pins on serial ports.

Kinda related:...

APRSdos has BIT/IO to the parallel port pins so that by APRS
message remotely, you can read the status of any pin or turn on
or off any pin.  This was for home-control ideas...  Bob, WB4APR