Xref: utzoo comp.sys.amiga.tech:5779 comp.misc:6387
Path: utzoo!bnr-vpa!bnr-fos!leibniz.uucp!protcoop
From: protcoop@leibniz.uucp
Newsgroups: comp.sys.amiga.tech,comp.misc
Subject: Serial Help
Message-ID: <637@bnr-fos.UUCP>
Date: 21 Jun 89 11:37:54 GMT
Sender: news@bnr-fos.UUCP
Reply-To: protcoop@leibniz.uucp ()
Organization: Bell-Northern Research, Ottawa, Canada
Lines: 22


This problem does not relate directly to the Amiga, but it is
technical and I do own an Amiga ... besides, I didn't know where
else to post it.

I now have two things that require connection to my serial port
(modem and X10 controller) and this is a problem.  I would like to
build a switch box so that I can connect both devices to it and
JUST FLICK a switch to select one.  Unfortunately I do not really
know how I can do this.  My first thought was to use a couple of
multiplexer chips and multiplex each line ... but I am not sure
if that will allow two way communication.  Also, this would require
each line to be multiplexed.  Do all the lines have to be switched?
Can I just make each line connect to both ports and just have one
line multiplexed ... say a certain line that tells the device he
has the port.  Is there such a line on my serial port?  I read the
description of the pin-outs but did not know what some of the pins
meant.  I would appreciate any input into this.  Thank you.
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