[Coco] MC6847 ( Motorola DS9823)

Fri Mar 22 07:46:11 EDT 2013

The upgraded SAM/SN74LS785 has a faster refresh cycle for faster RAM.  I'm 
not sure how this related to the T1 VGA.

Bruce W.

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----- Original Message ----- 
From: "Bill Pierce"

>
> > And another thing I didn't know was that the SN74LOS783 (MC6883 SAM 
> > chip) was replaced with the SN74LS785 (backwards compatable) to 
> > faciliate the new VDG chip. I wonder if it had any "hidden" features 
> > that the Coco wasn't using.
>
> Bill P
>
> Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Bill Pierce
> ooogalapasooo at aol.com 