From owner-freebsd-mobile Mon Aug 13 12:33:49 2001 Delivered-To: freebsd-mobile@freebsd.org Received: from vbook.express.ru (vbook.express.ru [212.24.37.106]) by hub.freebsd.org (Postfix) with ESMTP id C706E37B415 for ; Mon, 13 Aug 2001 12:33:46 -0700 (PDT) (envelope-from vova@express.ru) Received: from vova by vbook.express.ru with local (Exim 3.31 #2) id 15WNT4-0000Dt-00; Mon, 13 Aug 2001 23:33:42 +0400 From: "Vladimir B. Grebenschikov" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15224.11158.478417.89331@vbook.express.ru> Date: Mon, 13 Aug 2001 23:33:42 +0400 (MSD) To: David Horwitt Cc: freebsd-mobile@freebsd.org Subject: Serial port expansion In-Reply-To: <200108131830.LAA14836@aogsquid.ucsd.edu> References: <200108131830.LAA14836@aogsquid.ucsd.edu> X-Mailer: VM 6.72 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org David Horwitt writes: > I'm looking for a method of connecting 4-8 serial devices to a laptop. > The target connections are instruments that we can 'tip' to. You can use access device like "Livingston Portmaster 2" with 10/20/30 RS-232 ports. So you put on your bsd in.pmd in /etc/inetd.conf, configure portmaster to use your laptop (or other bsd/linux box) as host for ports you need and connect portmaster and laptop with regular ethernet. After it, On bsd box you have number of pseudo-ttys (/dev/ttyr0, ttyr1 or so) connected to RS-232 ports, modem controls (like DTR or setting port speed) will work. Only problem - it is size of portmaster (large enough to fit 30 RS-232 DB25 connectors). See photo on ebay (for instance) http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1262961365 > Thanks, > David Horwitt > Scripps Institution of Oceanography -- TSB Russian Express, Moscow Vladimir B. Grebenschikov, vova@express.ru To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message