Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!unmvax!polyslo!dorourke
From: dorourke@polyslo.CalPoly.EDU (David M. O'Rourke)
Newsgroups: comp.sys.amiga
Subject: Re: Multi-tasking and OS books
Message-ID: <11373@polyslo.CalPoly.EDU>
Date: 13 May 89 17:41:18 GMT
References: <17148@usc.edu> <24279@agate.BERKELEY.EDU> <18268@cup.portal.com> <17183@usc.edu> <11336@polyslo.CalPoly.EDU> <17195@usc.edu>
Reply-To: dorourke@polyslo.CalPoly.EDU (David M. O'Rourke)
Organization: Cal Poly State University -- San Luis Obispo
Lines: 22

In article <17195@usc.edu> papa@pollux.usc.edu (Marco Papa) writes:
>Multi-Finder is a program switcher TOTALLY under program control. The 
>program MUST be written with switch calls all over the place. When 1 simgle 
>program that doesn't use multi-finder is run, NO OTHER program can take

  I believe there's a misunderstanding, M-Finder switchs on several calls and
"Get Next Event & SystemTask", both GNE & SysTask are called several times
by an "Macintosh" program.  There are calls specific to MF that do a better
job of Task switching, but they don't "require" you to use them for
multi-tasking to occur.  It's very hard to write a mac program that doesn't
make a OS call.  Therefore apple has Multi-finder task switch on several
OS calls.

  BTW:  I've done some checking on OS/2, are you 100% sure it doesn't task
switch on OS call.  It's suppose to run on older 80286's which I'm sure don't
have the hardware to do it pre-emptive.  Perhaps a calm, cool and collected
usenet person could set the record straight.
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David M. O'Rourke____________________|_____________dorourke@polyslo.calpoly.edu
|       It's only 1's & 0's, so how difficult can Computer Science be?        |
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