[Coco] Adapting a V9958 64-pin Chip to fit a Solderless Breadboard

Luis Antoniosi (CoCoDemus) retrocanada76 at gmail.com
Fri Nov 29 13:23:09 EST 2013


But the V9958 receives the GIME hsync and vsync as hreset and vreset.
Woulnd't the v9958 balance it's own sync based on the external one ?

Otherwise what is the point for that if I had to sync them externally ?


On Fri, Nov 29, 2013 at 1:13 PM, <iggybeans at comcast.net> wrote:

> Actually Luis,
> Genlocking a V9958 is more complicated than it might initially seem and
> requires a PLL driven timing circuit that allows slight alterations in the
> VDP clock to sync the V9958's output to the external video.
> I would have consider this display generator for a Sprite board for the
> Coco, except for this complication.
> Good luck with the design guys.
> It looks like a great idea.
>
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