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,FREEMAIL_FROM autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,ce6f6f23c4e880ad X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-06-24 20:25:27 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!paloalto-snf1.gtei.net!crtntx1-snh1.gtei.net!lsanca1-snf1!news.gtei.net!enterprise!news.xtra.co.nz!53ab2750!not-for-mail From: "AG" Newsgroups: comp.lang.ada References: <10xR8.245$Gc5.62814264@newssvr14.news.prodigy.com> Subject: Re: Multitasking theory question X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Message-ID: Date: Tue, 25 Jun 2002 15:27:02 +1200 NNTP-Posting-Host: 210.54.67.222 X-Complaints-To: newsadmin@xtra.co.nz X-Trace: news.xtra.co.nz 1024975526 210.54.67.222 (Tue, 25 Jun 2002 15:25:26 NZST) NNTP-Posting-Date: Tue, 25 Jun 2002 15:25:26 NZST Organization: Xtra Xref: archiver1.google.com comp.lang.ada:26683 Date: 2002-06-25T15:27:02+12:00 List-Id: "Dale Stanbrough" wrote in message news:dale-368E8F.17334724062002@its-aw-news.its.rmit.edu.au... > In article , "AG" > wrote: > > > Not sure about that one. The only Ada compiler on DOS that > > I ever saw was a [very] old Meridian version. Since it was limited > > [all the usual disclaimers here] to just a few tasks if I remember > > correctly, and that DOS probably wasn't *the* problem, well... > > It looks like it wasn't the question of what does OS support - if > > you can do 15 tasks you can as wel do 255 at least :) > > The Meridian Ada compiler was quite a nice compiler Yep. And anyways - it was the only one I could get my hands on at the time. > (i've since > thrown out my documentation) but as far as I know there was no > restriction on the number of tasks (at least not down to the level > of "a few"). We may be talking different versions perhaps? The one I had, I tried to implement a simple, model, elevator-control setup for students to play with and work on basic asynch logic. (The sort of thing when random events happen and need to be handled on the first-come last-served :) basis). Unfortunatly, the system was limited to just 15 concurrent tasks. While still useful, it was not exactly enough. Don't get me wrong - it was still great for the time but, really, if you go for the trouble of writing a tasking implementation for DOS (of all things) why limit it to 15 tasks only? Surely, 255 shouldn't be much harder? Or 64k?