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

[Paul T. Barton]

I'm not sure either, but may have them if
they're still in my basement/garage room (same room).
Which one?

--- jdaggett at gate.net wrote:

> 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:
> 
> > 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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