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From: hollnbgh@coral.bucknell.edu
Newsgroups: comp.sys.amiga
Subject: Two megs of Chip RAM on an A2000 ??
Message-ID: <1990Nov23.020807.2951@coral.bucknell.edu>
Date: 23 Nov 90 07:08:07 GMT
Organization: Bucknell University, Lewisburg, PA, USA
Lines: 39


   A few days ago I saw an ad in AmigaWorld about a 2-meg chip RAM
enhancement for the A2000.  The company was The Grapevine Group.
I called them and inquired about the product.  They said that it
was basically a 2-meg Agnus chip and 1 meg of memory (plus a small
amount of circuitry) on a daughter board that fits into the Agnus's
square socket.  The price he quoted me was $339 (including RAM and
2-meg Agnus).  They say that they will purchase your used 1-meg
Agnus chip back for $25 if you have one.

They also said that this product will NOT fit into the 500 because
of physical problems, there just isn't enough room for it.

 My question:

  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.)  Since the 2x00
has only 1 meg installed (chip on newer and half chip and half
fast on older) the 21'st address line would not have any memory to
connect to.

  If this is so, they would not need to buy back 1-meg Agnus chips - 
since you could use them in the daughter board.

  I am probably wrong, and the 3000's Agnus is probably different
than the 500's and 2x00's, but I just would like to know for sure.

  If you are wondering, I just have a Fat Agnus (512K), and want
to upgrade to more, but am unsure whether to get this product, or
just get normal Agnus upgrade.  (Actually, I will wait for 2.0
anyway.)

Thanks,

Dale Hollenbaugh
hollnbgh@coral.bucknell.edu