[Coco] Fwd: Re: Video band width and accessing video memory

[Dave Philipsen]

Let's just say that with 120ns DRAM and the fact that the GIME has a 
28+MHz clock, it seems that it could have been designed to do 256 
colors.  And as Jim pointed out in an earlier message there probably is 
a way to steal a little time away from the 6809's side of the clock 
too.  Whether the 256-color mode is there or not we'll probably never 
know. My guess is that it was on the drawing board and maybe even in a 
prototype but because of one problem or another it never made it into 
the final version.  But have no fear, GIME X will soon be here!

Dave




On 6/4/2019 6:59 PM, Walter Zambotti wrote:
>
> So irrespective of whether the final coco3 had limitations if the gime 
> isn't constrained then the designers could have added the extra hidden 
> 256 color mode.
>
>
> So back to being a mystery I suppose.
>
>
> Walter
>
>
> Sent from my Xperia by Sony smartphone
>
>
>