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=1.3 required=5.0 tests=BAYES_00,INVALID_MSGID, MSGID_RANDY 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: Ted Dennison Subject: Re: CPU recommendations from an Ada perspective? Date: 1999/11/09 Message-ID: <809ckl$vbg$1@nnrp1.deja.com>#1/1 X-Deja-AN: 546444430 References: <7vvogh$ema$1@nnrp1.deja.com> <1e0ymjc.1fjcxni1os2v7cN@[192.168.0.5]> X-Http-Proxy: 1.0 x31.deja.com:80 (Squid/1.1.22) for client 204.48.27.130 Organization: Deja.com - Before you buy. X-Article-Creation-Date: Tue Nov 09 14:55:19 1999 GMT X-MyDeja-Info: XMYDJUIDtedennison Newsgroups: comp.lang.ada X-Http-User-Agent: Mozilla/4.6 [en] (WinNT; I) Date: 1999-11-09T00:00:00+00:00 List-Id: 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. :-) -- T.E.D. Sent via Deja.com http://www.deja.com/ Before you buy.