Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!bagate!cbmvax!cbmehq!cbmger!peterk
From: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Newsgroups: comp.sys.amiga
Subject: Re: Two megs of Chip RAM on an A2000 ??
Message-ID: <594@cbmger.UUCP>
Date: 23 Nov 90 16:47:41 GMT
References: <1990Nov23.020807.2951@coral.bucknell.edu>
Reply-To: peterk@cbmger.UUCP (Peter Kittel GERMANY)
Organization: Commodore Bueromaschinen GmbH, West Germany
Lines: 20

In article <1990Nov23.020807.2951@coral.bucknell.edu> hollnbgh@coral.bucknell.edu writes:
>
>  I was under the impression that the "2-Meg" Agnus chip was 
>exactly the same as the 1-meg Agnus chip currently shipping in the
>Amiga 500's, 2x00's, AND 3000's.  I thoght the CHIP was the same, 
>but that the 3000's socket connected the 21'st address line (that
>the 500's and 2x00's didn't connect to anything.)

No, it has been told a little different on the net: The silicon chip
inside Agnus is indeed identical in the 1-Meg and 2-Meg version,
BUT the inner bondings from the silicon to the outside pins differs,
so that in the 1-Meg version you have one address line not connected
to the contacts at the edge of the Agnus case. So if you don't want
to open that ceramic (or plastic) casing of Agnus and change the
bonding (with your 80 W soldering iron :-), you better change the
whole chip.

-- 
Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 
Commodore Frankfurt, Germany  \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk