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=2.1 required=5.0 tests=BAYES_40,INVALID_MSGID, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,971598a9377a949a X-Google-Attributes: gid103376,public From: bobplested@attglobal.net Subject: Re: CPU recommendations from an Ada perspective? Date: 1999/11/10 Message-ID: <382A4A62.2D5842F1@attglobal.net>#1/1 X-Deja-AN: 547199148 Content-Transfer-Encoding: 7bit References: <7vvogh$ema$1@nnrp1.deja.com> <1e0ymjc.1fjcxni1os2v7cN@[192.168.0.5]> <809ckl$vbg$1@nnrp1.deja.com> X-Accept-Language: en Content-Type: text/plain; charset=us-ascii X-Complaints-To: abuse@prserv.net X-Trace: 11 Nov 1999 04:48:27 GMT, 166.72.121.63 Organization: Global Network Services - Remote Access Mail & News Services MIME-Version: 1.0 Reply-To: bobplested@attglobal.net Newsgroups: comp.lang.ada Date: 1999-11-10T00:00:00+00:00 List-Id: Ted Dennison wrote: > In article <1e0ymjc.1fjcxni1os2v7cN@[192.168.0.5]>, > swelter@mus.ch (Sascha Welter) wrote: > > Ted Dennison wrote: > > > > > I know of at least > > > one engine controller that was done for the navy using PC-based > > > hardware > > > Please tell me that it wasn't the thing that did a divison-by-zero > > error and they had to haul the ship to the port to get it fixed... it > > could not believe this to happen if it was programmed in Ada. > > Happily. It was not that system. That was done in C (Visual C++ I'd > wager) by our competitors. The demo I saw had it running on Win95, > but I don't know which OS they used on the ship. The mandate was in > force at the time, but they got around it by doing the development under > a R&D contract. I won't mention their name, but their initials are CAE. > :-) > > Frankly I'm suprised their system lasted as long as it did. Our system > by contract had to pass rigorous shock and vibe tests, and they still > didn't trust it without a traditional backup system and a manual > workaround. I don't believe CAE had to do any of that. > > When I first joined that group I was told about the seriousness of > causing a ship to need a tow. Apparently its a rather humiliating > experience for its captain. So in this group there was nothing (and I > mean NOTHING) more serious than a software problem that causes the ship > to go "dead in the water". Well, you can imagine the cruel glee around > our offices when that ship had to be towed. :-) I was talking with a friend about salvage rights in international waters. He indicated that your ship may be considered salvage even if you're still aboard and willingly accept a tow. That would be an expensive software error. bob