From owner-freebsd-hackers Wed Jan 31 10:35:09 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id KAA26446 for hackers-outgoing; Wed, 31 Jan 1996 10:35:09 -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 KAA26439 for ; Wed, 31 Jan 1996 10:35:07 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id LAA10174; Wed, 31 Jan 1996 11:26:43 -0700 From: Terry Lambert Message-Id: <199601311826.LAA10174@phaeton.artisoft.com> Subject: Re: Watchdog timers (was: Re: Multi-Port Async Cards) To: msmith@atrad.adelaide.edu.au (Michael Smith) Date: Wed, 31 Jan 1996 11:26:42 -0700 (MST) Cc: terry@lambert.org, jgreco@brasil.moneng.mei.com, msmith@atrad.adelaide.edu.au, hsu@clinet.fi, hm@altona.hamburg.com, freebsd-hackers@FreeBSD.ORG, brian@MediaCity.com In-Reply-To: <199601310302.NAA17096@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Jan 31, 96 01:32:51 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 > Terry Lambert stands accused of saying: > > Go down to Radio shack and buy a copper dot-pad prototype board; they > > are about $10. > > > > Then solder a ribbon connector on it, and run a ribbon cable off to a > > bread board. > > Hey presto, instant RF-to-logic converter. You can now reset your PC > by opening your 'fridge door or putting on the washing. That's why you drop the bus clock rate. 8-). > > Put optoisolators on the breadboard before connecting anything else. > > Yetch. Cheap optos are too slow, and fast ones are too expensive. That's why you put them on the breadboard or on a dedicated developement card instead of on the finished card. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.