Tony Duell wrote:
What would be _really_ nice would be the schematic of an old
(pre-microcontorller [1]) ACU with an RS366 interface. I don't suppose
anyone knows of one.
I might be hallucinating (or making it up), but I am having a flashback
to a Z-80 cpu board which had parallel port which just happened to
map to RS366.
It was a name-brand cpm all-in-one board at the time (which would have
been around... mmm... 1988-89 I think)
As I recall the board was originally made for John Deere and later
sold as mainstream z-80 cpm board.
It probably doesn't help, but for some reason that came to mind while
reading your note. At one point I did connect it to a dialer. I think
it was a modem which had an additional "dialer port"... but I don't
remember who made the modem.
(If I am remembering correctly it was used it to poll POS terminals in
little jewelery kiosks all over the east coast :-)
-brad