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From: eegibbon@grace (Matthew Gibbons)
Subject: Re: Real-time systems: Windows-NT or QNX
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References: <FriOct14102309EST1994@eric> <37kql1$e4d@vixen.cso.uiuc.edu> <37ltcm$ged@sol.sun.csd.unb.ca>
Date: Fri, 21 Oct 1994 12:27:01 GMT
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Xref: glinda.oz.cs.cmu.edu comp.realtime:7289 comp.os.qnx:2314 comp.os.ms-windows.advocacy:41216 comp.robotics:14611

Chris Newton CSD (newton@jupiter.sun.csd.unb.ca) wrote:
: In article <37kql1$e4d@vixen.cso.uiuc.edu>,
: larson eric <elarson@ux1.cso.uiuc.edu> wrote:
: >bernie@ecr.mu.OZ.AU (Bernie Kirby) writes:
: >
: >>Any thoughts what-so-ever would be greatly appreciated.
: >=============
: > 
: >Why not investigate OS/2?
: > 
: >Eric Larson                  | University of Illinois at Urbana-Champaign

: 	Probably he wouldn't want to because OS/2 doesn't have any 
: real-time scheduling priorities like NT.  QNX on the other hand is solely 
: built for real-time stuff as I understand it.

Priority-based scheduling is not real-time. If you need this sort of
scheduling, then you have not designed your control system correctly.

DOS isn't billed as real-time, doesn't have prioritised, pre-emptive
scheduling, doesn't support inherent time-stamping etc. but it is
possible, with very little work, to construct a deterministic, real-
time control system in this environment.

Not that I would use DOS or anything, it just points out what you
need and what you don't. :-)

: Chris

: -- 
: | | |\   | |\  University of New Brunswick, Fredericton, Canada
: | | | \  | |/  ===========================================================
: | | |  \ | |\  I Dont knot speek fer noboeys butt  me, caause I aint gots 
: \_/ |   \| |/  no good grammer... :)

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