Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 beta 3/9/83; site desint.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!sdcrdcf!trwrb!desint!geoff From: geoff@desint.UUCP (Geoff Kuenning) Newsgroups: net.unix-wizards Subject: Re: unix & real time -- is a rewritten UNIX still UNIX? Message-ID: <221@desint.UUCP> Date: Sat, 17-Nov-84 18:30:56 EST Article-I.D.: desint.221 Posted: Sat Nov 17 18:30:56 1984 Date-Received: Mon, 19-Nov-84 03:23:53 EST References: <39@uwvax.UUCP> <5633@brl-tgr.ARPA> <9785@watmath.UUCP> <5727@brl-tgr.ARPA> Organization: his home computer, Thousand Oaks, CA Lines: 18 In article <5727@brl-tgr.ARPA> Doug Gwyn writes: >Anyone doing real-time programming has to write some nitty-gritty stuff. >My point was that it is no harder to do this on UNIX than on any other >system (e.g., VMS). Adding real-time support to VMS is precisely as hard as adding pipes to Unix-- it's already there. As to adding real-time to Unix, see the comments by Bill Shannon from Sun Microsystems about spl()'s. The fact is that Unix is so bad at real-time performance that most micro-based Unixes can't handle even *one* 9600-baud incoming data line, though even an 8080 has the power to handle two. -- Geoff Kuenning First Systems Corporation ...!ihnp4!trwrb!desint!geoff