MMU changes wasRe: [Coco] Re: Coco Repack

[jdaggett at gate.net]

Willard

I am not using a PIC to replace the GIME. I am going to use a 
XILINX FPGA. Mostlikley as Spartan 2 maybe a Sparrtan 2E or 3 if 
I can get a 6309 to work at 3.3 VDC at 2 MHz.

james

On 11 Aug 2004 at 1:38, Willard Goosey wrote:

Date sent:      	Wed, 11 Aug 2004 01:38:52 -0600
From:           	Willard Goosey <goosey at virgo.sdc.org>
To:             	coco at maltedmedia.com
Subject:        	Re: MMU changes wasRe: [Coco] Re: Coco 
Repack
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> >From: jdaggett at gate.net
> >Date: Tue, 10 Aug 2004 08:37:18 -0400
> 
> >I  have no plans to change from the 8K pages. And yes I have t 
> >hought of ways to increase beyond two tasks. Four  would be nice.
> >Four would also require another 16 bytes or a means of multiplexing
> >the existing 16 bytes. 
> 
> Well, yeah.  I do realize that.  How much room do you have on your PIC
> chip?  It's been a while since I've examined the CoCo 3 Tech Ref, but
> I'd expect the problem with adding contexts is that the GIME might not
> have the extra bits in its I/O ports to talk about additional
> contexts.
> 
> Admittedly, you probably want to get your PIC GIME replacement running
> as a stock GIME first, then see how much room you have left for extra
> goodies.  
> 
> Willard
> -- 
> Willard Goosey  goosey at sdc.org
> Socorro, New Mexico, USA
> "I've never been to Contempt!  Isn't that somewhere in New Mexico?"
>    --- Yacko
> 
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