Path: utzoo!mnetor!uunet!husc6!mailrus!nrl-cmf!cmcl2!rutgers!iuvax!pur-ee!uiucdcs!uiucdcsp!ladd
From: ladd@uiucdcsp.cs.uiuc.edu
Newsgroups: comp.sys.mac
Subject: Re: A/UX window systems, Mac toolbo
Message-ID: <76000151@uiucdcsp>
Date: 16 Mar 88 02:44:00 GMT
References: <7670@apple.Apple.Com>
Lines: 18
Nf-ID: #R:apple.Apple.Com:7670:uiucdcsp:76000151:000:692
Nf-From: uiucdcsp.cs.uiuc.edu!ladd    Mar 15 20:44:00 1988


>I think one point you are both missing out on is that preemptive multitasking
>requires hardware support not available on a 68000.  It is not compatibility
>that stops us from implementing preemption, although it does pose some hairy
>problems, but the requirement that we can run on a MacPlus and SE.  It may be
>that preemptive multitasking is preferable to cooperative multitasking -- this
>is the real argument here, at least the really interesting one -- but it isn't
>possible on a MacPlus.  We are investigating preemption on the MacII.

>.....
>-Phil Goldman
>Apple Computer

What a shame.  The 68000 could have been a good UNIX processor :-).

Dave
ladd@a.cs.uiuc.edu
uiucdcs!ladd