Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!hao!ames!elroy!cit-vax!tybalt.caltech.edu!lyles
From: lyles@tybalt.caltech.edu (Lyle Scheer)
Newsgroups: comp.sys.amiga
Subject: Re: Carrier detect and signals
Message-ID: <4650@cit-vax.Caltech.Edu>
Date: Tue, 24-Nov-87 14:33:52 EST
Article-I.D.: cit-vax.4650
Posted: Tue Nov 24 14:33:52 1987
Date-Received: Sat, 28-Nov-87 00:14:18 EST
References: <498@ndsuvax.UUCP>
Sender: news@cit-vax.Caltech.Edu
Reply-To: lyles@tybalt.caltech.edu.UUCP (Lyle Scheer)
Organization: California Institute of Technology
Lines: 32

In article <498@ndsuvax.UUCP> ncreed@ndsuvax.UUCP (Walter Reed) writes:
>
>I need to know how to set up the serial device to generate a signal when
>the carrier drops.  I am writting the serail routines for my BBS and
>don't want to have to do a CheckCarrier() type of thing all over the place.
>Yes, I know about the CMD_QUERY, but that's not what I want.  If I did that,
>I could set up a timer_request to check the carrier once a second, but I
>would rather have it tell me when the carrier drops.  At least, it would be
>nice if I could have a flag like SERB_CHECKCD that would enable checking of
>the carrier and return an error of SerErr_NOCD if the carrier is lost.
> 
>Please CBM, PLEASE release the source for the serial device, and / or add
>this capability...  It would make writting an AUX: device easier, a BBS
>easier...  This is such a small change, and I request that you put it into
>version 1.3.  We need it.  Gee, it would be nice to detect a SIG_HUP and 
>deal with it.
>
That's odd.  I've had a BBS program written for the Amiga since about a year
and a half ago.  The way I do it is, after I output a line of text to the
serial port and CON: device in my window, I check for CD with CmdQuery.  It
doesn't slow it down much.  I also check during my input routine, with no real
loss of input speed.  In fact, I'm quite impressed with how well the Amiga
does with this sort of thing.  I now have my BBS program doing mostly
wait(), so its ready for me to start figuring out how to make it
re-entrant, so that I can multitask more than one serial port(ASDG or someone,
I NEED MORE SERIAL PORTS!)


					Wonko the Sane
				      (you call this SANE??)

Disclaimer: I am totally irresponsible.  So shoot me then.