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From: wayne@motatl.UUCP (R.W.McGee)
Newsgroups: net.micro.mac,net.micro.68k
Subject: timing loops
Message-ID: <156@motatl.UUCP>
Date: Sun, 9-Feb-86 12:11:43 EST
Article-I.D.: motatl.156
Posted: Sun Feb  9 12:11:43 1986
Date-Received: Wed, 12-Feb-86 06:47:04 EST
Distribution: net
Organization: Motorola Semiconductor Products, Atlanta, GA  30328
Lines: 11
Xref: watmath net.micro.mac:4594 net.micro.68k:1479

The use of software timing loops on an asyncronous
microprocessor should be discouraged. On the 68k family,
these loops will get different results depending on dtack
being the same for rom or ram, and will be different from
the 68000, 68010, and 68020 based on the loop mode of the 
68010 or cache of the 68020. Public floggings would provide
a cure, but would be hard to implement.

Wayne McGee  mot!motatl!wayne

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