handshaking 850 interfaces?

From: Joseph Pallendino (as195@cleveland.Freenet.Edu)
Date: 05/09/94-10:24:56 AM Z

From: as195@cleveland.Freenet.Edu (Joseph Pallendino)
Subject: handshaking 850 interfaces?
Date: Mon May  9 10:24:56 1994

  I have two Atari 850 Interfaces which I would like to use to transfer
info from one 8 bit computer to another 8 bit computer.
  I'm trying to write a telecommunication program and I want to see how the
screen will look on another computer calling mine.
  I already have a null modem cable in which pins 3 and 4 have been
switched on the 9 pin plug (male) that goes into the 850 interface port #1.
  This works fine for transferring from my Atari to my IBM but I wasn't sure
if it would work for two 850 Interfaces.
  Can a direct connection between the two 850 interfaces be used or does
a null modem have to be used?
  If you know the wiring configuration for a null modem other than the one
I described above please e-mail me the connections or the name of a source
where this info can be found.
  Thanks in advance.

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