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From: m5d@bobkat.UUCP
Newsgroups: comp.unix.questions
Subject: Re: Apple Mac II
Message-ID: <866@bobkat.UUCP>
Date: Mon, 13-Apr-87 09:48:24 EST
Article-I.D.: bobkat.866
Posted: Mon Apr 13 09:48:24 1987
Date-Received: Wed, 15-Apr-87 00:14:25 EST
References: <173@perdix.lu.se> <3423@osu-eddie.UUCP>
Reply-To: m5d@bobkat.UUCP (Mike McNally (Man Insane))
Organization: Digital Lynx, Inc; Dallas, TX
Lines: 27
Keywords: UNIX, virtual memory?

In article <3423@osu-eddie.UUCP> bob@osu-eddie.UUCP (Bob Sutterfield) writes:
 >In article <173@perdix.lu.se> anders@perdix.lu.se (Anders Ardo ) writes:
 >>
 >>  I have a few questions about the new Apple Mac II.
 >>	[ ... ]
 >>*  Anyone have practical experience with it?
 >
 >It runs quite  nicely, but thrashes inconveniently when memory-starved
 >with large applications.  But then you expect that from anything.
 >
 >-- 
 > Bob Sutterfield, Department of Computer and Information Science

Correct me if I'm wrong, but the belief in this neck of the woods is that
the Mac II has no DMA controller.  Because of this, the processor is
responsible for managing transfers from the SCSI (or whatever) interface,
so I/O bound processes could consume alarming amounts of processor
resources.

Has anyone used a system with such hardware (or similarly, a very greedy
DMAC)?  Is the suspicion correct?

-- 
Mike McNally, mercifully employed at Digital Lynx ---
    Where Plano Road the Mighty Flood of Forest Lane doth meet,
    And Garland fair, whose perfumed air flows soft about my feet...
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