Newsgroups: comp.sys.amiga.advocacy
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!peck
From: peck@sol.ral.rpi.edu (Joseph Peck)
Subject: Re: MegaMac
Message-ID: <8#xh-4h@rpi.edu>
Nntp-Posting-Host: ral.rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy NY
References: <91157.001511MBS110@psuvm.psu.edu> <16719@darkstar.ucsc.edu> <1315@cbmger.UUCP>
Date: 7 Jun 91 18:21:37 GMT
Lines: 35

In article <1315@cbmger.UUCP> peterk@cbmger.UUCP (Peter Kittel GERMANY) writes:
>In article <16719@darkstar.ucsc.edu> galpin@ucscb.UCSC.EDU (Dan Galpin (Amiga-quester)) writes:
>>
>>Until a product comes out (and I am sure that it will..) all the A3000 owners
>>are pretty much limited to 18 Megs.
>>(Is it possible to put a ZORRO II (**slow**) card in and get another 8 megs?)
>
>Yes it is. So, with 8 MB boards easily available (A2058 from C=), you
>have at least the chance to equip your A3000 with 18+3*8=42 MB RAM today.

Ummm, isn't the Zorro II space still limited to only 1 block of 8megs?
Unless the 3000 is doing something funny like bank switching (ugh!),
it seems like you should still be limited to 18+8=26 megs of ram.

This does lead to another idea:
     A small adapter card (Zorro III) that autoconfigures in the 1.75 meg
range and allows you to plug in a Zorro II card.  The original Zorro II
address lines get passed straight through to the old card, while the
adaptor monitors the upper lines.  The adaptor dictates whether or
not the board is enabled.  Some work would have to be done to allow
this "double autoconfiguration", but the logic shouldn't be terrible.

This would allow multiple Zorro II cards with large configuration requirements
to coexist.  Hmmmm, need 5 24 bit frame buffers? 5 8meg 16bit memory boards?
No problem...

(Oh yeah, 5 boards for the 3000T, 3 for the 3000)

Hey, look at that!  A real suggestion in .advocacy!  What is the net
coming to.... :)

>Best regards, Dr. Peter Kittel  // E-Mail to  \\  Only my personal opinions... 

Joe Peck
peck@ral.rpi.edu
