From: "Marin D. Condic" <mcondic-nospam@acm.com>
Subject: Re: Interresting thread in comp.lang.eiffel
Date: 2000/07/13
Date: 2000-07-13T21:01:50+00:00 [thread overview]
Message-ID: <396E2E35.88FE32B8@acm.com> (raw)
In-Reply-To: 8kl25k$2q7k0$1@ID-9852.news.cis.dfn.de
Joachim Durchholz wrote:
> The IRS is a piece of hardware from the point of view of the main
> controlling software of the Ariane, right?
>
No. The IRS was a pair of MilStd1750a computers that received inputs
from sensors along hardware interfaces. The software in question was
running on both computers. When the software encountered the fault in
question, its behavior was to shut down and transfer control to the
other channel. Because both computers were running identical software,
they both shut down. The IRS was being viewed as an "off the shelf"
part, similar to how you might view an electronic fuel injection
computer purchased for your car. An analogy would be if you took an EFI
computer built for a Dodge Neon and mounted it in a Mack truck without
ever testing it in the Mack truck application to see if it would work.
MDC
--
======================================================================
Marin David Condic - Quadrus Corporation - http://www.quadruscorp.com/
Send Replies To: m c o n d i c @ q u a d r u s c o r p . c o m
Visit my web site at: http://www.mcondic.com/
"Some people think programming Windows is like nailing jello to the
ceiling... easy with the right kind of nails."
-- Ivor Horton - Beginning Visual C++ 6
======================================================================
next prev parent reply other threads:[~2000-07-13 0:00 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8ipvnj$inc$1@wanadoo.fr>
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2000-07-13 0:00 ` Interresting thread in comp.lang.eiffel Joachim Durchholz
2000-07-13 0:00 ` Marin D. Condic [this message]
2000-07-14 0:00 ` Ken Garlington
2000-07-16 0:00 ` Joachim Durchholz
2000-07-16 0:00 ` Ken Garlington
2000-07-19 0:00 ` Joachim Durchholz
2000-07-19 0:00 ` Ken Garlington
2000-07-14 0:00 ` Ken Garlington
2000-07-14 0:00 ` Marin D. Condic
2000-07-14 0:00 ` Ken Garlington
[not found] ` <3963DEBF.79C40BF1@eiffel.com>
[not found] ` <2LS85.6100$7%3.493920@news.flash.net>
[not found] ` <8k5aru$1odtq$1@ID-9852.news.cis.dfn.de>
[not found] ` <Rnt95.7826$7%3.596208@news.flash.net>
[not found] ` <8k8pk2$20cab$1@ID-9852.news.cis.dfn.de>
[not found] ` <_dS95.9945$7%3.666180@news.flash.net>
2000-07-12 0:00 ` David K Allen
2000-07-12 0:00 ` David Gillon
2000-07-13 0:00 ` Joachim Durchholz
2000-07-13 0:00 ` David Gillon
2000-07-13 0:00 ` David K Allen
2000-07-13 0:00 ` Bob Allen
2000-07-13 0:00 ` Joachim Durchholz
2000-07-18 0:00 ` Veli-Pekka Nousiainen
2000-07-19 0:00 ` Joachim Durchholz
2000-07-14 0:00 ` Ken Garlington
2000-07-18 0:00 ` Veli-Pekka Nousiainen
2000-07-19 0:00 ` David Gillon
2000-07-12 0:00 ` Bob Allen
2000-07-12 0:00 ` Ken Garlington
2000-07-13 0:00 ` Bob Allen
2000-07-14 0:00 ` Ken Garlington
2000-07-14 0:00 ` carr_tom
2000-07-18 0:00 ` Veli-Pekka Nousiainen
2000-07-14 0:00 ` Marin D. Condic
2000-07-12 0:00 ` Ken Garlington
2000-07-12 0:00 ` David K Allen
2000-07-13 0:00 ` Howard W. LUDWIG
2000-07-13 0:00 ` Joachim Durchholz
2000-07-14 0:00 ` Ken Garlington
2000-07-14 0:00 ` Ken Garlington
2000-07-18 0:00 ` Veli-Pekka Nousiainen
2000-07-19 0:00 ` Ken Garlington
2000-07-19 0:00 ` Bob Allen
2000-07-12 0:00 ` David K Allen
[not found] ` <Rnt95.78 <L6vb5.16117$7%3.988701@news.flash.net>
2000-07-14 0:00 ` Nick Williams
[not found] ` <396502D2.BD8A42E7@earthlink.net>
[not found] ` <RSsa5.11075$7%3.784507@news.flash.net>
[not found] ` <6aHa5.113$6E.23141@ptah.visi.com>
[not found] ` <396B4A68.458FA3BC@maths.unine.ch>
[not found] ` <u6hp4i16$GA.283@cpmsnbbsa07>
2000-07-11 0:00 ` cropt
2000-07-11 0:00 ` Ken Garlington
2000-07-12 0:00 ` Peter Amey
2000-07-12 0:00 ` Peter Amey
2000-07-13 0:00 ` Joachim Durchholz
2000-07-12 0:00 ` Bob Allen
2000-07-12 0:00 ` David Starner
2000-07-12 0:00 ` Ken Garlington
[not found] ` <39654639.B3760EF2@eiffel.com>
[not found] ` <i4k95.7512$7%3.571616@news.flash.net>
[not found] ` <oqog45g1j0.fsf@premise.demon.co.uk>
[not found] ` <85Fa5.11419$7%3.818927@news.flash.net>
2000-07-11 0:00 ` Aspects (Re: Interesting thread in comp.lang.eiffel) tom
2000-07-12 0:00 ` Steve Merrick
2000-07-12 0:00 ` Frank Mitchell
2000-07-14 0:00 ` Jubilation
2000-07-14 0:00 ` Frank Mitchell
2000-07-15 0:00 ` Jubilation
2000-07-12 0:00 ` Veli-Pekka Nousiainen
2000-07-12 0:00 ` tom
2000-07-12 0:00 ` Design by Contract (was " David Kristola
2000-07-12 0:00 ` Howard W. LUDWIG
2000-07-12 0:00 ` Greg
2000-07-12 0:00 ` Eirik Mangseth
2000-07-13 0:00 ` Joachim Durchholz
2000-07-14 0:00 ` David Kristola
2000-07-14 0:00 ` Matthew J Heaney
2000-07-16 0:00 ` Joachim Durchholz
2000-07-17 0:00 ` David Kristola
2000-07-19 0:00 ` Joachim Durchholz
2000-07-25 0:00 ` Richard Riehle
2000-07-12 0:00 ` Greg
2000-07-12 0:00 ` Matthew J Heaney
2000-07-13 0:00 ` Eirik Mangseth
2000-07-18 0:00 ` Interesting thread in comp.lang.eiffel Veli-Pekka Nousiainen
2000-07-19 0:00 ` Ken Garlington
[not found] ` <i4k95.7512$7%3.571616@n <397D8CC3.BB0C9001@ix.netcom.com>
2000-07-29 0:00 ` Writing better software was: Design by Contract (was Re: Interesting thread in comp.lang.eiffel) Kent Paul Dolan
2000-07-29 0:00 ` Ken Garlington
2000-07-31 0:00 ` Stefan Skoglund
2000-08-01 0:00 ` Ken Garlington
2000-08-01 0:00 ` Kent Paul Dolan
2000-08-01 0:00 ` Ken Garlington
2000-07-31 0:00 ` Simon Brady
2000-07-30 0:00 ` John Magness
2000-08-01 0:00 ` Simon Brady
2000-08-01 0:00 ` Simon Brady
2000-08-04 0:00 ` Robert I. Eachus
2000-08-04 0:00 ` Simon Brady
2000-08-01 0:00 ` Ken Garlington
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[not found] ` <A5J95.9237$7%3.638838@news.flash.net>
2000-07-12 0:00 ` Interresting thread in comp.lang.eiffel Robert I. Eachus
2000-07-13 0:00 ` Ken Garlington
2000-07-23 0:00 ` Robert I. Eachus
2000-07-23 0:00 ` Ken Garlington
2000-07-24 0:00 ` David Gillon
2000-07-24 0:00 ` Ken Garlington
2000-07-24 0:00 ` swhalen
2000-07-24 0:00 ` David Gillon
[not found] ` <39688CA2.31B2A7EF@acm.com>
2000-07-13 0:00 ` Joachim Durchholz
2000-07-13 0:00 ` Marin D. Condic
[not found] ` <8k8p8m$1upjk$1@ID-9852.news.cis.dfn.de>
[not found] ` <0cS95.9944$7%3.667682@news.flash.net>
2000-07-13 0:00 ` Joachim Durchholz
2000-07-14 0:00 ` Ken Garlington
[not found] ` <39573CAB.BB90DF92@gecm.com>
[not found] ` <8j8ek0$24la$3@ID-9852.news.cis.dfn.de>
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2000-07-13 0:00 ` Joachim Durchholz
2000-07-14 0:00 ` Ken Garlington
2000-07-16 0:00 ` Joachim Durchholz
2000-07-16 0:00 ` Ken Garlington
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2000-07-18 0:00 ` Interesting " Veli-Pekka Nousiainen
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