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From: mat6013@DMZRZU71.BITNET
Newsgroups: comp.sys.apple
Subject: RS-422 to RS-232C
Message-ID: <8709270737.aa17287@SMOKE.BRL.ARPA>
Date: Sun, 27-Sep-87 20:31:27 EDT
Article-I.D.: SMOKE.8709270737.aa17287
Posted: Sun Sep 27 20:31:27 1987
Date-Received: Mon, 28-Sep-87 04:38:19 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 16

I have not yet purchased the Apple IIgs hardware manual but want to connect an
acoustic coupler or modem with RS-232C interface to the internal modem port of
Apple  IIgs  as soon as possible.  I'm not sure about the right wiring and the
meaning  and  difference  of  TxD+/TxD-  and  RxD+/RxD-  on the 8-pin mini-DIN
outlet.  So,

- how would a minimal connection (ground, TxD, RxD) look like,
- how a full featured (DSR, DTR, DCD);
-  what's  an  appropriate configuration for the port to select in the control
  panel (especially for handshaking) ?

Please  respond  directly  thru  email  -  immediate  help  would  be  greatly
appreciated.

                                        Matthias Kapffer
                                        <MAT6013@DMZRZU71.BITNET>