Re: A89: Remapping the Flash Mem

Re: A89: Remapping the Flash Mem

• To: assembly-89@lists.ticalc.org
• Subject: Re: A89: Remapping the Flash Mem
• From: Johan Eilert <johei804@student.liu.se>
• Date: Wed, 29 Nov 2000 12:24:03 +0100
• In-Reply-To: <20001128180411.23978.qmail@web1704.mail.yahoo.com>; from Jeff Flanigan on Tue, Nov 28, 2000
• References: <20001128180411.23978.qmail@web1704.mail.yahoo.com>
• Reply-To: assembly-89@lists.ticalc.org

On Tue, Nov 28, 2000, Jeff Flanigan wrote:
> 
> Does anyone know how to remap the flash mem to address
> $000000?

Why would anyone ever want to do that?!?  :-)


> When the calc first starts up (the batteries
> are put in), the flash mem is mapped to address
> $000000.

The reset vector is somehow remapped to $000000-$000007.  Whether the rest
of the ROM is remapped or not is pretty much irrelevant.


> What are the i/o ports used to remap it to
> either $000000 or $200000?

AFAIK there is/are no such I/O port(s).  The remapping is probably enabled
and disabled automatically by dedicated hardware.


-- 
Johan Eilert

Urv, wrt re rgg xelcgreg abefx ivehf!
Fraq zrt gvyy nyyr iraarar qvar bt fyrgg nyyr svyre cn uneqvfxra qva

• Re: A89: Remapping the Flash Mem
• From: Cassady Roop <croop@oregontrail.net>

• A89: Remapping the Flash Mem
• From: Jeff Flanigan <propalo@yahoo.com>

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