From owner-freebsd-hackers Thu Feb 1 17:23:13 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id RAA19679 for hackers-outgoing; Thu, 1 Feb 1996 17:23:13 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id RAA19660 for ; Thu, 1 Feb 1996 17:23:06 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id SAA14342; Thu, 1 Feb 1996 18:17:27 -0700 From: Terry Lambert Message-Id: <199602020117.SAA14342@phaeton.artisoft.com> Subject: Re: Watchdog timers (was: Re: Multi-Port Async Cards) To: nate@sri.MT.net (Nate Williams) Date: Thu, 1 Feb 1996 18:17:27 -0700 (MST) Cc: terry@lambert.org, msmith@atrad.adelaide.edu.au, jgreco@brasil.moneng.mei.com, hackers@FreeBSD.org In-Reply-To: <199602012310.QAA21816@rocky.sri.MT.net> from "Nate Williams" at Feb 1, 96 04:10:49 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.org Precedence: bulk > > I'd probably throw multiport serial and/or ethernet cards in the 6 > > PCI slots. 8-). > > I don't think such a thing exists. A PCI-slot has one and only one IRQ > associated with it, so you generally don't have multi-port PCI cards, > hence the reason for having ISA slots (+ backward's compatability). > > I remember having this conversation with Rod a while back. PCI can do interrupt sharing (edge vs. level). Presumably, you'd also know how to design boards (unlike ISA manufacturers) and you would put $1 of multiplexing logic on the board. I know Cisco has a PCI router board that does this. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.