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Path: utzoo!watmath!clyde!caip!lll-crg!lll-lcc!well!mitsu
From: mitsu@well.UUCP (Mitsuharu Hadeishi)
Newsgroups: net.micro.amiga
Subject: Re: Serial Port Communications
Message-ID: <1407@well.UUCP>
Date: Thu, 10-Jul-86 14:24:33 EDT
Article-I.D.: well.1407
Posted: Thu Jul 10 14:24:33 1986
Date-Received: Sat, 12-Jul-86 04:09:35 EDT
References: <148@umd-ua.UUCP> <1381@amiga.amiga.UUCP>
Reply-To: mitsu@well.UUCP (Mitsuharu Hadeishi)
Distribution: net
Organization: Whole Earth Lectronic Link, Sausalito CA
Lines: 15
Keywords: serial, interrupt, 18
Summary: Disconnect Pin 18


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	A couple people have been having problems hooking up devices
to the serial port.  One thing to remember is that the Amiga not only has
hot pins, it also has extra signals, so that to be safe you should only
connect pins 2-8 and 20.  One typically errant signal is that of pin 18,
the system-wide I/O interrupt line.  If pin 18 means something else to
your modem or terminal, you could be having some major problems (this
is a completely non-standard pin, included so that designers could take
advantage of having the I/O interrupt line on the Amiga available.)
Try disconnecting pin 18, or better yet, just get a null-modem cable
(you need this anyway, swaps lines 2 and 3) that only connects the
lines you need (typically 2-8 and 20 are available.)
			-Mitsu