Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!cbmvax!cbmehq!babylon!rbabel
From: rbabel@babylon.rmt.sub.org (Ralph Babel)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: A2630 and memory
Message-ID: <08740.AA08740@babylon.rmt.sub.org>
Date: 27 Jun 91 17:06:21 GMT
References: <1991Jun27.180057.20712@actrix.gen.nz>
Reply-To: cbmvax.commodore.com!cbmehq!babylon!rbabel (Ralph Babel)
Lines: 33

In article <1991Jun27.180057.20712@actrix.gen.nz>,
keith@actrix.gen.nz (Keith Stewart) writes:

> Does the A2630 card with 2 meg on board reserve 4 meg of
> memory space upon bootup even though the last two meg is
> not yet in it.

No, this is not possible under Zorro-II.

> With my GVP HC+8 with 4 meg filled and an A2630 in my 2000
> the memory is not contiguous between the A2360 (configured
> at $200000 to 3FFFFF) and the GVP HC+8 configs at 600000
> to 9FFFFF.

As I said earlier: according to the Zorro-II specs, 4-meg
PICs must be able to be configured to 4-meg boundaries, to
location $00200000, or to location $00600000. Unfortunately,
the 1.3 expansion.library only makes use of the latter two
configurations.

> I would like contiguous memory if possible and will
> probably fill the A2630 with another 2 meg.

That's probably the best solution, but here's yet another
idea (I'm assuming Kickstart 1.3 and SetCPU 1.6):

1. Save the Kickstart image ($FC0000-$FFFFFF) to disk.
2. Change the byte at location $FC4FBB from $20 to $00.
3. Boot this modified image using SetCPU KICKROM.

Now your memory should be contiguous.

Ralph