Date: Thu, 3 Jul 1997 01:16:33 -0600 (MDT) From: Wes Peters <softweyr@xmission.com> To: "Andrew K. Adams" <akadams@wraith.psc.edu> Cc: questions@freebsd.org Subject: TrueTime GPS... Message-ID: <199707030716.BAA04660@obie.softweyr.ml.org> In-Reply-To: <199707020030.UAA05757@wraith.psc.edu> References: <199707020030.UAA05757@wraith.psc.edu>
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Andrew K. Adams writes:
> I would like to attach a GPS to a FreeBSD box (for network
> synchronization) and would be very appreciative of any information
> anyone can offer. I am currently looking at a model manufactured by
> TrueTime (XL-DC 600), since it (and my PC) is rack-mountable and it
> provides a serial port for communication -- I am unsure if the latter
> is useful with FreeBSD.
Chances are pretty good it is a NMEA-0183 port, which uses RS-422
signalling levels. You should be able to plug it into a PC serial port,
unless you have really bad hardware.
You'll have to contact the manufacturer for information on the protocol
they use. There is *some* standardization in this area, but I wouldn't
count on your software working with it. Most manufacturers are pretty
good about releasing protocol specs, though I've never heard of
TrueTime.
(I'm known as Barnacle Wes in another, *much* slower dimension. ;^)
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://www.xmission.com/~softweyr softweyr@xmission.com
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