Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!uwm.edu!ogicse!hsdndev!rutgers!cbmvax!daveh
From: daveh@cbmvax.commodore.com (Dave Haynie)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Amiga and its memory map
Message-ID: <18881@cbmvax.commodore.com>
Date: 12 Feb 91 23:20:40 GMT
References: <2207@ria.ccs.uwo.ca>
Reply-To: daveh@cbmvax.commodore.com (Dave Haynie)
Organization: Commodore, West Chester, PA
Lines: 32

In article <2207@ria.ccs.uwo.ca> ptoper@obelix (Andy Nagy) writes:

>	The maximum stated address space for the A3000 is a mere 1.75 GB.
>	What is the rest of the 4GB address space of the 68030 used for?
>	(A detailed anwer would be appreciated.)

Cheap-ass A3000 memory map:

$ff010000-$ffffffff	Reserved
$ff000000-$ff00ffff	Zorro III autoconfig block
$80000000-$feffffff	Reserved
$10000000-$7fffffff	Zorro III board space
$08000000-$0fffffff	Coprocessor slot board space
$07000000-$07ffffff	A3000 Fast RAM 
$01000000-$06ffffff	Reserved (future motherboard space)
$00f80000-$00ffffff	ROM
$00f00000-$00f7ffff	Production diagnostic ROM space
$00e90000-$00efffff	Zorro II I/O space
$00e80000-$00e8ffff	Zorro II autoconfig block
$00e00000-$00e7ffff	Reserved
$00b80000-$00dfffff	Motherboard I/O and reserved space
$00a00000-$00b7ffff	Zorro II I/O space
$00200000-$009fffff	Zorro II memory space
$00000000-$001fffff	Chip RAM

The regions in 24 bit space are essentially the same as on 68000 based Amigas,
though the optional "Ranger" memory chunk starting at $00c00000 doesn't contain
any memory, of course.
-- 
Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests"
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	"What works for me might work for you"	-Jimmy Buffett