Path: utzoo!mnetor!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!WPI.BITNET!DSEAH
From: DSEAH@WPI.BITNET
Newsgroups: comp.sys.apple
Subject: GS modem port
Message-ID: <8804201709.AA06818@wpi.local>
Date: 20 Apr 88 17:09:52 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 26

Ok, ok.  Here is what I REALLY meant to say.  In our last episode, Dave
was struggling with unfamiliar terms.  A newcomer to communications still
baffled by RS232 lingua technica, he tries to make a GS to external modem
cable.  But lo, the back of the reference book says:

PRINTER and MODEM PORTS

Pin#  Signal descriptions       Pin#  Signal description
--------------------------------------------------------
1       Handshake out           5       Receive data minus
2       Handshake in            6       Transmit data plus
3       Transmit data minus     7       Goes to DCD input on SCC
4       Signal ground           8       Receive data plus

The terms are strangely familiar, yet so different.  The plus and
minus stuff make the very ground upon which he stands tremble
in uncertainty.  A kind soul suggested that the minus was for
RS422 communications.

So what is the correspondence to a RS232 DB25 connector?

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|              Dave Seah --- Worcester Polytechnic Institute                |
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