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: 11232c,59ec73856b699922 X-Google-Attributes: gid11232c,public X-Google-Thread: fdb77,5f529c91be2ac930 X-Google-Attributes: gidfdb77,public X-Google-Thread: 1108a1,59ec73856b699922 X-Google-Attributes: gid1108a1,public X-Google-Thread: 103376,583275b6950bf4e6 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-05-09 21:25:44 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!sn-xit-03!sn-xit-06!sn-post-01!supernews.com!corp.supernews.com!not-for-mail From: Jim Weirich Newsgroups: comp.lang.java.advocacy,comp.object,comp.lang.ada,misc.misc Subject: Re: Using Ada for device drivers? (Was: the Ada mandate, and why it collapsed and died) Followup-To: comp.lang.java.advocacy Date: Sat, 10 May 2003 00:24:53 -0400 Organization: Posted via Supernews, http://www.supernews.com Message-ID: References: <9fa75d42.0304230424.10612b1a@posting.google.com> <9fa75d42.0305090424.45b522b5@posting.google.com> User-Agent: KNode/0.6.1 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit X-Complaints-To: abuse@supernews.com Xref: archiver1.google.com comp.lang.java.advocacy:63445 comp.object:63141 comp.lang.ada:37133 misc.misc:14066 Date: 2003-05-10T00:24:53-04:00 List-Id: John R. Strohm wrote: > And this one http://www.cpm.z80.de/source.html contains, among other > things, > the original CP/M source code. In PL/M. Complete with Gary Kildall's > copyright notice. > > Here are the first few lines. Wow ... this brings back memories. PL/M was the system programming language for Intel's iRMX real timg system back in the 80s. We used iRMX as a basis for a real time data acquisition system for digital jet engine controllers. All the programming was done in PL/M, including interrupt handlers and device drivers. No assembly code anywhere. (C was used in some later systems.) However, I didn't know that CP/M was written in it. Thanks for the info. One minor quibble ... > CP/M was written in PL/M, a variant of PL/I developed by Dr. Gary > Kildall. PL/M certainly owed its syntactic heritage to PL/I (that's obvious from looking at the code), but semantically it was much closer to C (which is appropriate given its target platform). -- -- Jim Weirich jweirich@one.net http://w3.one.net/~jweirich --------------------------------------------------------------------- "Beware of bugs in the above code; I have only proved it correct, not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)