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=0.6 required=5.0 tests=BAYES_20,FREEMAIL_FROM, INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 108abf,d3bcc180a8b0eea4,start X-Google-Attributes: gid108abf,public X-Google-Thread: 103376,d3bcc180a8b0eea4,start X-Google-Attributes: gid103376,public From: Rocky Subject: [Fwd: F22 completes 11% of its Flight tests] Date: 2000/01/12 Message-ID: <387C8859.621FA20B@netscape.net>#1/1 X-Deja-AN: 571634610 X-Accept-Language: en Content-Type: multipart/mixed; boundary="------------78E2703C759827DBAA3B206F" X-Trace: client 947685465 130.210.205.193 (Wed, 12 Jan 2000 08:57:45 EST) MIME-Version: 1.0 NNTP-Posting-Date: Wed, 12 Jan 2000 08:57:45 EST Newsgroups: comp.lang.ada,rec.aviation.military Date: 2000-01-12T00:00:00+00:00 List-Id: This is a multi-part message in MIME format. --------------78E2703C759827DBAA3B206F Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Would someone from the Ada community care to join in? --------------78E2703C759827DBAA3B206F Content-Type: message/rfc822 Content-Transfer-Encoding: 7bit Content-Disposition: inline Path: client!psinr!peerfeed.news.psi.net!news.idt.net!netnews.com!europa.netcrusader.net!24.30.200.2!cyclone-east.rr.com!news.rr.com!news-east.rr.com!portc05.blue.aol.com!gw12.bcandid.com.MISMATCH!gw22.nn.bcandid.com!cyc12.deja.bcandid.com!typ12.deja.bcandid.com.POSTED!not-for-mail From: "jtarver" Newsgroups: rec.aviation.military,sci.military.naval References: <38768BB7.7F5528B5@io.com> <3877B076.7AD29DE1@io.com> <38790C3E.99014710@io.com> <387A8922.3F5259B6@io.com> <2ywe4.1828$iy5.79143@typ12.deja.bcandid.com> <387a976a.8967066@news.xmission.com> <387ba707.12964812@news.xmission.com> <388299ca.2188436@news.xmission.com> Subject: Re: F22 completes 11% of its Flight tests X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 Message-ID: NNTP-Posting-Host: (protected and logged) X-Trace: 2-00188123c1ebef45d0835a9728588e28d94cc26006eb7284f4b1 NNTP-Posting-Date: Tue, 11 Jan 2000 21:54:24 EST Date: Tue, 11 Jan 2000 18:49:05 -0800 Xref: client rec.aviation.military:320490 sci.military.naval:230676 Harry Andreas wrote in message news:andreas-1101001558400001@x-147-16-144-157.rsc.raytheon.com... > In article <388299ca.2188436@news.xmission.com>, sferrin@xmission.com (D. > Scott Ferrin) wrote: > > > >The people producing the parts have a contract to do so and there are also > > >specialty suppliers that stock obsolete parts for currently operating > > >airplanes. The i960 and all Intel's military foundry is gone now. None of > > >the specialty suppliers bought a bunch of i960 mil-spec processors because > > >there was no market for them. So as with any unmaintainable airplane system > > >the MPP must be replaced for production; as they will be unsupportable in > > >the field. This is that much more powerful than a cray central processor we > > >have heard so much about. > > > > > >John > > > > > > > > > So nobody knows this or is it something only you are privy to? So how > > do they plan on building these fighters with no chips to go in them? > > John and I have had this discussion before. He insists on maintaining > [pun] this story even though it's not true. What part of the story is not true Harry? The way you get to cray like speed with micros is to use the geometric improvement in processing power indicated for parallel processors. > The F-22 CIP was designed from day 1 to be able to easily upgrade the > processor, and other chip technologies, without re-designing the entire > system. Writing in Ada does this for you, supposedly. > This was a key feature of PAVE PACE architectures which are de rigeur > today but which F-22 was the first real implementation. > We knew during the YF and demval phases that we would be using different > processor chips for production. It's unavoidable given today's fast moving > market. The processor used in the MPP was already obsolete by then. > The application software is written without direct calls to the hardware. > Everything goes through the OS which acts as a buffer between the physical > hardware and the application code. So when your processor chip goes off > market, you replace it and part of the OS and theoretically the tactical > software doesn't have to change [which is the biggest cost item]. The > devil is in the details however. [BTW, I'm no software guy. There's a > million details that makes this possible.] It will be highly impressive to see a version of Ada that is actually transportable. The first thing the development of Ada compilers did was allow extensions in direct violation of the charter for the system. This worked to deliver the pork to Boston, but really comprimised the intent of the DARPA program funding Ada. John --------------78E2703C759827DBAA3B206F--