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 autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 101deb,f96f757d5586710a X-Google-Attributes: gid101deb,public X-Google-Thread: f43e6,5ac12f5a60b1bfe X-Google-Attributes: gidf43e6,public X-Google-Thread: 103376,5ac12f5a60b1bfe X-Google-Attributes: gid103376,public From: Ken Garlington Subject: Re: Ariane 5 - not an exception? Date: 1996/08/22 Message-ID: <321C81DD.5FFB@lmtas.lmco.com>#1/1 X-Deja-AN: 175891901 references: <4t9vdg$jfb@goanna.cs.rmit.edu.au> <4tiu6e$kpm@news2.cais.com> <4up8pi$lvi@goanna.cs.rmit.edu.au> <32106B34.57DB@lmtas.lmco.com> <4vgmqh$1bi@goanna.cs.rmit.edu.au> content-type: text/plain; charset=us-ascii organization: Lockheed Martin Tactical Aircraft Systems mime-version: 1.0 newsgroups: comp.software-eng,comp.lang.ada,comp.lang.pl1 x-mailer: Mozilla 2.02 (Macintosh; I; 68K) Date: 1996-08-22T00:00:00+00:00 List-Id: ++ robin wrote: > > Ken Garlington writes: > > >++ robin wrote: > >> > 2) PL/I > >> > a) There is no PL/I compiler for the 1750A > >> ---Not an obstacle. How was an Ada compiler written for it? > > >I believe an existing one was purchased. I don't believe an Ada > >compiler was written specifically for the Ariane SRI, as apparently > >you are suggesting be done for PL/I. How would your argument about > >mature PL/I compliers stand up in the face of a requirement to > >develop a brand-new compiler for a new target? > > ---This is a red herring. The same could be said of the > Ada compiler when it was written. And, it was said in in the 1980's, when the first Ada compilers were sold for the 1750. That is why these Ada compilers were not considered mature when they first came out. That is why people like myself had to do extensive work to use those first compilers in the early Ada/1750 flight control systems. Now, let's talk about the present-day, and the Ariane 5. Which is a more mature compiler, a PL/I compiler for the 1750 which would have had its first use on the Ariane 5, or an Ada compiler which has probably been used on several real-time projects previously? You previous comment was that "PL/I is more mature than Ada," but with respect to the 1750, the Ada compilers would be the more mature implementations, right? How's that list of PL/I-based real-time airborne control systems coming along, BTW? :) When do we get to find out your background in real-time systems? -- LMTAS - "Our Brand Means Quality"