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From: bryce@hoser.berkeley.edu (Bryce Nesbitt)
Newsgroups: comp.sys.amiga
Subject: Amiga 500 speed
Message-ID: <3763@zen.berkeley.edu>
Date: Wed, 16-Sep-87 01:40:06 EDT
Article-I.D.: zen.3763
Posted: Wed Sep 16 01:40:06 1987
Date-Received: Fri, 18-Sep-87 05:38:07 EDT
Sender: news@zen.berkeley.edu
Organization: Center Tapped Solids, Inc.
Lines: 18

A reliable source just told me that early Amiga 500s have a defect that
causes Dtack to be handled improperly.  The result is a wait state,
slowing the machine down quite a bit.
This may be the source of the rumors that the A500 (and A2000) are slower
than the A1000.  (See the tester program I posted a while back that has
shown that the production models at least have no basic speed penalty.)

The problem has to do with the GARY chip.  Sounded like a CMOS output
was not converted to TTL properly... but I'm not sure about that.  The
fix is a single transistor.  The reliable source learned this at a
A500 service traning course given by Commodore.  Presumably the problem
and it's fix will be common knowlege at service centers soon.

 
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{o O} . 
 (") 	bryce@hoser.berkeley.EDU -or- ucbvax!hoser!bryce
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