From owner-freebsd-hackers  Tue Jan 30 20:26:18 1996
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id UAA11361
          for hackers-outgoing; Tue, 30 Jan 1996 20:26:18 -0800 (PST)
Received: from eldorado.net-tel.co.uk (eldorado.net-tel.co.uk [193.122.171.253])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id UAA11318
          for <hackers@freebsd.org>; Tue, 30 Jan 1996 20:25:29 -0800 (PST)
From: Andrew.Gordon@net-tel.co.uk
Received: (from root@localhost) by eldorado.net-tel.co.uk (8.6.12/8.6.10) id EAA19410 for hackers@freebsd.org; Wed, 31 Jan 1996 04:24:34 GMT
X400-Received: by mta "eldorado" in "/PRMD=net-tel/ADMD=gold 400/C=gb/"; 
        Relayed; Wed, 31 Jan 96  4:20:59 +0000
X400-Received: by mta "net-tel cambridge" in "/PRMD=net-tel/ADMD=gold 400/C=gb/";
         Relayed; Wed, 31 Jan 96  4:20:56 +0000
X400-Received: by "/PRMD=NET-TEL/ADMD=Gold 400/C=GB/"; Relayed; 
        Wed, 31 Jan 96  4:20:56 +0000
X400-MTS-Identifier: 
        ["/PRMD=NET-TEL/ADMD=Gold 400/C=GB/";hst:29545-960131042056-0AFA]
X400-Content-Type: P2-1984 (2)
X400-Originator: Andrew.Gordon@net-tel.co.uk
Original-Encoded-Information-Types: IA5-Text
X400-Recipients: hackers@freebsd.org
Date: Wed, 31 Jan 96  4:20:56 +0000
Content-Identifier: Re: Watchdog tim
Message-Id: <"arg-home.net-tel-0131042105-8916*/G=Andrew/S=Gordon/O=Net-Tel
 Computer Systems Ltd/PRMD=Net-Tel/ADMD=Gold 400/C=GB/"@MHS>
To: hackers@freebsd.org
In-Reply-To: <"SunOS:19241-960131022246-304F*/DD.RFC-822=owner-hackers(a)freebsd.org/O=internet/PRMD=NET-TEL/ADMD=GOLD
 400/C=GB/"@MHS>
Subject: Re: Watchdog timers (was: Re: Multi-Port Async Cards)
Sender: owner-hackers@freebsd.org
Precedence: bulk

> I was thinking about tackling the problem myself by putting an 8751-class
> microcontroller on a PC card and writing a quick'n'stupid bit of timer code
> for the 8751 that would do all the dirty work (mainly because I would hate 
> trying to wire all the digital logic for a traditional watchdog counter,
> and I'm not familiar with any of the Maxim-type monolithic watchdog chips).
> I don't have PC board facilities available to me and the prototyping cards
> are expensive$$$$$.

Why not hang it off the parallel port?