From owner-freebsd-hardware Fri Jun 28 21:24:04 1996 Return-Path: owner-hardware Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id VAA03087 for hardware-outgoing; Fri, 28 Jun 1996 21:24:04 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id VAA03054 for ; Fri, 28 Jun 1996 21:23:51 -0700 (PDT) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id NAA20298; Sat, 29 Jun 1996 13:40:26 +0930 From: Michael Smith Message-Id: <199606290410.NAA20298@genesis.atrad.adelaide.edu.au> Subject: Re: muliport boards - building a PPP dialup server To: mrm@marmot.Mole.ORG (M.R.Murphy) Date: Sat, 29 Jun 1996 13:40:25 +0930 (CST) Cc: msmith@atrad.adelaide.edu.au, stesin@elvisti.kiev.ua, hardware@FreeBSD.org, Kevin_Swanson@BLaCKSMITH.com In-Reply-To: <199606281619.JAA24043@meerkat.mole.org> from "M.R.Murphy" at Jun 28, 96 09:19:10 am MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hardware@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk M.R.Murphy stands accused of saying: > > A thing to watch out for is that the multi-16550 boards (I'm familiar > with Digiboard 8-port and HUB-6 with 16550) generate a LOT of heat. Good > cooling is required. Especially with more than one board in a system. This is highly dependant on the type of UART on the board. Older NMOS parts (16550AFN etc.) will generate quite a lot of heat, especially when they're busy. Newer parts (16C550, PC16550D) don't get anywhere near so hot. > Mike Murphy mrm@Mole.ORG +1 619 598 5874 -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[