[Coco] [color computer] Just imagining...

[jdaggett at gate.net]

Paul

I seemed to remember of that but not sure that I have it anymore. I wished 
like heck that I got more of the app notes for the 6800 and 6809 processors 
in the 80's.

james

On 31 Jan 2006 at 11:12, Paul T. Barton wrote:

Date sent:      	Tue, 31 Jan 2006 11:12:28 -0800 (PST)
From:           	"Paul T. Barton" <idezilla at yahoo.com>
Subject:        	Re: [Coco] [color computer] Just imagining...
To:             	CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
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> Actually E-high is CPU and E-low is Video.
> You got it right about the IDMA, and it
> can work with a 6800/74ls783/mc6847 also,
> with some glue logic. Motorola did an
> app notes sheet about dual CPU's, interleaved
> them.
> 
> Paul - idezilla
> 
> --- jdaggett at gate.net wrote:
> 
> > David
> > 
> > IDMA, Interleaved DMA. This is already being done on
> > the Coco. The Video accesses ram when the E Clock is
> > high and the CPU when the E clock is low. Tack on
> > another CPU and you have contention with ram. 
> > 
> > james
> 
> 
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