home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
kermit.columbia.edu
/
kermit.columbia.edu.tar
/
kermit.columbia.edu
/
newsgroups
/
misc.20000217-20000824
/
000262_news@columbia.edu _Tue May 2 10:37:04 2000.msg
< prev
next >
Wrap
Internet Message Format
|
2000-08-23
|
2KB
Return-Path: <news@columbia.edu>
Received: from watsun.cc.columbia.edu (watsun.cc.columbia.edu [128.59.39.2])
by fozimane.cc.columbia.edu (8.9.3/8.9.3) with ESMTP id KAA25666
for <kermit.misc@cpunix.cc.columbia.edu>; Tue, 2 May 2000 10:37:01 -0400 (EDT)
Received: from newsmaster.cc.columbia.edu (newsmaster.cc.columbia.edu [128.59.59.30])
by watsun.cc.columbia.edu (8.8.5/8.8.5) with ESMTP id KAA17055
for <kermit.misc@watsun.cc.columbia.edu>; Tue, 2 May 2000 10:37:01 -0400 (EDT)
Received: (from news@localhost)
by newsmaster.cc.columbia.edu (8.9.3/8.9.3) id KAA12106
for kermit.misc@watsun.cc.columbia.edu; Tue, 2 May 2000 10:34:06 -0400 (EDT)
X-Authentication-Warning: newsmaster.cc.columbia.edu: news set sender to <news> using -f
From: fdc@columbia.edu (Frank da Cruz)
Subject: Re: MS-DOS null cable
Date: 2 May 2000 14:34:05 GMT
Organization: Columbia University
Message-ID: <8emp0t$bq7$1@newsmaster.cc.columbia.edu>
To: kermit.misc@columbia.edu
In article <8emnkc$1ei$1@nnrp1.deja.com>,
Peter Easthope <peter_easthope@gulfnet.pinc.com> wrote:
: In <3905B873.3F230E52@home.com> posted at 2000 Apr 25,
: Andre Cormeau <NOacorSPAM@home.com> wrote,
: ac> I am having no luck with a null modem connection ...
:
: Most documentation, EIA-RS-232 for example, assumes the 25
: pin connector. In an e-mail Mark Sapiro reported this
: correspondence between the two connectors.
:
Note that null modem wiring diagrams are given in the Kermit
books. The difference between a true null modem and minimal
fakeout cable is also explained there. You'll also find
the pinouts for DB-25, DB-9, and Mini Din-8 connectors, e.g.
on page 492-496 of "Using C-Kermit".
The PC serial port is standard RS-232/V.24 as far as the
10 pins commonly used for asynchronous communication are
concerned.
The Macintosh serial port is not RS-232 at all. In order
to connect a Macintosh port to an RS-232 device, custom
wiring is needed that shorts certain of the Macintosh pins
together. This technique does NOT carry over to non-Macintosh
platforms.
- Frank