From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.4 required=5.0 tests=AC_FROM_MANY_DOTS,BAYES_00 autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,bc1361a952ec75ca X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-08-03 07:33:14 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!psinet-eu-nl!psiuk-p4!uknet!psiuk-n!news.pace.co.uk!nh.pace.co.uk!not-for-mail From: "Marin David Condic" Newsgroups: comp.lang.ada Subject: Re: How Ada could have prevented the Red Code distributed denial of service attack. Date: Fri, 3 Aug 2001 10:15:47 -0400 Organization: Posted on a server owned by Pace Micro Technology plc Message-ID: <9kebmk$mb4$1@nh.pace.co.uk> References: <9kc355$ri0$1@nh.pace.co.uk> <9kcdli$24o$1@nh.pace.co.uk> NNTP-Posting-Host: 136.170.200.133 X-Trace: nh.pace.co.uk 996848148 22884 136.170.200.133 (3 Aug 2001 14:15:48 GMT) X-Complaints-To: newsmaster@news.cam.pace.co.uk NNTP-Posting-Date: 3 Aug 2001 14:15:48 GMT X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Xref: archiver1.google.com comp.lang.ada:11217 Date: 2001-08-03T14:15:48+00:00 List-Id: Which target machine? I bet the Arianne 5 has lots of computers on it. IIRC, this was the Inertial Reference System that had a pair of Mil-Std-1750a processor boards running identical software. The FDA for certain classes of errors was to shut down the processor and switch to the other side. Its been a while since I had to deal with this and I may be heading into the springtime of my senility, but I recall Lockheed Martin personnel beating me about the head and shoulders vigorously because my rocket system had a pair of Mil-Std-1750a's and was being programmed in Ada and had very similar FDA. They wanted to know if I was going to drop their billion dollar payload into the ocean with the same error. So its possible that I am remembering this all wrong. But I can still see the welts on my back from the beating I took over having an identical processor and an identical language. Maybe the flogging just addled my mind. MDC -- Marin David Condic Senior Software Engineer Pace Micro Technology Americas www.pacemicro.com Enabling the digital revolution e-Mail: marin.condic@pacemicro.com Web: http://www.mcondic.com/ "Reivilo Snuved" wrote in message news:stzo9h78kx.fsf@aonix.fr... > > Bzzt. The target machine for Ariane-5 was (and still is) a 68k-series. > Operand Error referred to a FPU exception. >