Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!cbmvax!daveh
From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A3000 and 2090
Keywords: A3000 A2090 SCSI
Message-ID: <13251@cbmvax.commodore.com>
Date: 17 Jul 90 17:45:49 GMT
References: <2886@isc-br.ISC-BR.COM> <5118@ethz.UUCP>
Reply-To: daveh@cbmvax (Dave Haynie)
Organization: Commodore, West Chester, PA
Lines: 29

In article <5118@ethz.UUCP> visinfo@bernina.ethz.ch.UUCP (VISINFO c/o Peter Simeon) writes:

>I had no time yet to test cards in a Rev 6.3 but in my 7.3 the 2090
>works perfectly. (I have connected a SyQuest, too). I also tested the
>GVP Impact Hardcard Controller, A Supra 2400ZI Modem and a A2052 memory
>expansion. All these cards work perfectl in my A3000. Currently I have
>installed the SUPRA, GVP and 2090 card all together.

The operation of expansion cards is mainly a function of the Buster chip in
the system, not the motherboard.  All motherboards since before the Beta test
systems have had essentially the same expansion bus logic, which amounts 10
F-series (or equivalent) buffer chips, a clock driver, and a hand full of 
resistors.  Just about all of the logic that drives the bus is contained 
within the Buster chip.

>But when I tested these cards in an early dealer demo A3000 which had
>a Rev 6.1 motherboard, none of them worked!

Early dealer demo or developer units shipped with an early Buster with several
known bugs.  All production units shipped with a final Buster revision that
fixed a host of little bugs.  So, in any case, you'll find that expansion board 
functionality will follow Busters, not PCB revisions.

>/* Peter Simeon,      UUCP: |       //                             //     */

-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
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	"I have been given the freedom to do as I see fit" -REM