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From: rokicki@rocky.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: 68k word-alignment penalty?
Message-ID: <212@rocky.STANFORD.EDU>
Date: Wed, 25-Mar-87 13:55:21 EST
Article-I.D.: rocky.212
Posted: Wed Mar 25 13:55:21 1987
Date-Received: Fri, 27-Mar-87 02:45:50 EST
References: <8703242118.AA05186@cory.Berkeley.EDU> <1585@cbmvax.cbmvax.cbm.UUCP>
Organization: Stanford University Computer Science Department
Lines: 11
Summary: Badly designed systems, that is

grr@cbmvax.cbm.UUCP (George Robbins) writes:
> BTW, the 68000 is known to do some really gross things on mis-aligned word
> access on some systems.  Seems it glitchs data-stobe before it gets serious
> about doing an exception, causing DRAM derangement.  As far as I know, this
> isn't a problem with the Amiga...

This is a known `feature' of the 68000, well documented in the
manual.  If memory serves, it drops address strobe, and then raises
it without dropping either data strobe.  Any system which does not
have the necessary logic to deal with this is an improperly designed
system and its designers should be taken out and summarily shot.