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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham 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 08:05:04 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!oleane.net!oleane!nnrp.oleane.net!not-for-mail From: Reivilo Snuved Newsgroups: comp.lang.ada Subject: Re: How Ada could have prevented the Red Code distributed denial of service attack. Date: 03 Aug 2001 17:02:03 +0200 Organization: In Reverse Sender: devuns@buzet Message-ID: References: <9kcdli$24o$1@nh.pace.co.uk> <9kedbi$fb3@augusta.math.psu.edu> NNTP-Posting-Host: gauntlet-fr.aonix.fr X-Trace: s1.read.news.oleane.net 996850923 15562 62.161.92.253 (3 Aug 2001 15:02:03 GMT) X-Complaints-To: abuse@oleane.net NNTP-Posting-Date: Fri, 3 Aug 2001 15:02:03 +0000 (UTC) X-Newsreader: Gnus v5.7/Emacs 20.4 Xref: archiver1.google.com comp.lang.ada:11226 Date: 2001-08-03T17:02:03+02:00 List-Id: cross@augusta.math.psu.edu (Dan Cross) writes: > In article , > Reivilo Snuved wrote: > >Bzzt. The target machine for Ariane-5 was (and still is) a 68k-series. > >Operand Error referred to a FPU exception. > > Really? It hardly seems like a commodity microprocessor would be > reliable enough for something that demanding. Don't get me wrong, the > MC68k series is very, very reliable, but is there really a model which > is designed for the additional stress and interference characteristics > of use on board a space craft? I'm asking; I'd be very interested if > there were! Well, it IS a 68k aboard Ariane-5. 68020-class. Don't know the exact chip though. Remember, the "new" engine controllers for SSMEs are 68k also. There's a ESA DASIA proceedings book where the A5 architecture is described, I'm still trying to locate it however .... :-( -- Olivier Devuns | Aonix: http://www.aonix.com