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From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 68020 MEMORY ERROR
Message-ID: <22007@cbmvax.commodore.com>
Date: 29 May 91 18:08:08 GMT
References: <1991May27.132900.28266@comspec.uucp>
Reply-To: daveh@cbmvax.commodore.com (Dave Haynie)
Organization: Commodore, West Chester, PA
Lines: 28

In article <1991May27.132900.28266@comspec.uucp> jeffg@comspec.uucp (Jeff Goebel) writes:
>I have a friend who recently bought a 68020 board I had been using for a few
>years.  On my system it worked, but on HIS, he gets a "Memory Configuration
>Error" when he does a reboot holding the two mouse buttons.

It sounds like he may need a ROM update to prevent that.  Some of the code in
the ROMs was rather naieve about autoconfiguration way back then.  

>When he gets the error here, it still seems to work, but not as well as it 
>should.

>When he operates in 68000 mode, programs which USED to work no longer do
>100%.  A few games screw up etc.  He blames me.  I don't have an answer.

The errors reported by the A26x0 ROMs shouldn't have any bearing on the 
system's operation under AmigaOS.  Unless the software is coming up wrong,
you're either running on a 68000 or you're not, there's no in-between, as
you seem to be implying here.  One word of advice -- don't power up the OS
with the 68020 in charge, then switch to 68000 with a keyboard reset and
expect everything to work correctly.  The Amiga OS will build an Exec up with
the 68020 considered as the host CPU.  When you do a keyboard reset, you'll
more that likely be doing a warm boot, Exec isn't rebuilt, and you fire up
the 68000 with the OS still thinking it's on a 68020.  That could cause a few
things to fail.
-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: hazy     BIX: hazy
      "That's me in the corner, that's me in the spotlight" -R.E.M.
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