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From: herbie@polaris.UUCP (Herb Chong)
Newsgroups: net.micro.amiga
Subject: Re: Amiga shown with 68020
Message-ID: <316@polaris.UUCP>
Date: Tue, 3-Dec-85 15:28:50 EST
Article-I.D.: polaris.316
Posted: Tue Dec  3 15:28:50 1985
Date-Received: Sat, 7-Dec-85 04:08:29 EST
References: <310@amiga.UUCP> <39700008@ISM780B.UUCP>
Reply-To: herbie@polaris.UUCP (Herb Chong)
Organization: IBM TJ Watson RC
Lines: 29

In article <39700008@ISM780B.UUCP> tim@ISM780B.UUCP writes:
>
>> == bobp@amiga in net.micro.amiga
>
>> is an invalid user mode operation in the 68010 and 68020.)  In addition,
>> you should be sure to NOT use the upper 8 bits of a pointer for storing
>> 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.

suppose i were rich and managed to both buy the 68020 board and 32M of
memory to go with it?  'nuff said.  don't ever use those "spare" address
bits or you'll eventually go through what IBM is now with upgrades to 31-bit
addressing unless you know you will never upgrade and/or will junk your
machine before the amiga comes standard with a 68020.
 

Herb Chong...

I'm still user-friendly -- I don't byte, I nybble....

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