[Coco] [color computer] Just imagining...
Paul T. Barton
idezilla at yahoo.com
Tue Jan 31 17:59:33 EST 2006
I'm not sure either, but may have them if
they're still in my basement/garage room (same room).
--- jdaggett at gate.net wrote:
> 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.
> 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
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
More information about the Coco