Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!cbmvax!daveh
From: daveh@cbmvax.UUCP (Dave Haynie)
Newsgroups: comp.sys.amiga
Subject: Re: Custom Chips
Message-ID: <6679@cbmvax.UUCP>
Date: 24 Apr 89 17:32:00 GMT
References: <1845@aucs.UUCP>
Organization: Commodore Technology, West Chester, PA
Lines: 21

in article <1845@aucs.UUCP>, 840445m@aucs.UUCP (Alan W. McKay) says:
> Keywords: Amiga, Denise, Paula, Agnus, Gary

> The Amiga has three custom chips, right?  Denise, Paula and Agnus.  Fine.
> That was their names in the orignal 1000.  O.K. so who is this Gary guy
> that I've been hearing about?  

Agnus, Paula, and Denise were the three original Amiga custom chips, and are
full custom LSI chips.  For the A500, Agnus gained weight by sucking in some
of the peripheral logic around her and going from 48 to 84 pins (also allowing
her to manage 1 meg of RAM, though initially only 1/2 of that was CHIP memory).
Also new for the A500 way Gary, a gate array that replaced a good deal of the
other glue logic on the A1000 board.  For the US designed A2000 (eg, "B2000"),
we added yet another custom gate array, Buster, who controls the expansion 
bus.

> % Alan W. McKay     %                                             %
-- 
Dave Haynie  "The 32 Bit Guy"     Commodore-Amiga  "The Crew That Never Rests"
   {uunet|pyramid|rutgers}!cbmvax!daveh      PLINK: D-DAVE H     BIX: hazy
              Amiga -- It's not just a job, it's an obsession