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From: dale@amiga.UUCP (Dale Luck)
Newsgroups: net.micro.amiga
Subject: Re: Amiga shown with 68020
Message-ID: <349@amiga.amiga.UUCP>
Date: Thu, 28-Nov-85 14:50:33 EST
Article-I.D.: amiga.349
Posted: Thu Nov 28 14:50:33 1985
Date-Received: Sat, 30-Nov-85 00:28:59 EST
References: <310@amiga.UUCP> <39700008@ISM780B.UUCP>
Reply-To: dale@tooter.UUCP (Dale Luck)
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 18

In article <39700008@ISM780B.UUCP> tim@ISM780B.UUCP writes:
>> == bobp@amiga in net.micro.amiga
>> unrelated information, since the 68020 uses all 32 bits for addressing.
>
>Well, the 68020 puts out all 32 bits.  But does the system use them?  If
>it doesn't, then it should be ok to play games with these bits.
>

CSA's amiga/68020 board has 256k of memory. It was configured to be
at 7f000000-7f03ffff. This caused a hickup in one of our libraries since
it was internal using some of the 8msb as some flags. That got changed
REAL FAST.  We advise all those that wish to write software that is
hoped to run on compatible but more powerful products to assume that all
pointers are 32 bits.
BTW: The 256k or more of memory that CSA puts on this 68020 board is
not included in the total 8mbytes of memory expansion available via the
expansion bus.  It lives in an address space above the 68000 16mbyte
space.