[Coco] CoCo 3 RGB to SCART video, then converted to HDMI

[Matthew Stock]

I've mentioned this a few times in the past, but this guy has a simple
composite sync schematic on this page
http://www.epanorama.net/circuits/vga2rgbs.html.  I've used it with a
knockoff CGA to VGA adaptor and it worked well.

Matt


On Thu, Apr 30, 2015 at 9:54 AM, CoCo Demus <retrocanada76 at gmail.com> wrote:

> A NOR gate will result in VSYNC without serration, for instance the LM1881
> cannot separate it without adjusting the resistor.
>
> I would try a XNOR instead.
>
> On Thu, Apr 30, 2015 at 9:49 AM, Michael Rowen <mike at borncoco.com> wrote:
>
> > I would think the coco RGB vertical/horizontal (pins 8 &9) inverted
> > through a 74LS02 (Nor gate) would work to the sync line on the scart.
> This
> > is very cool. I'm going to try this myself.
> >
> > This device also converts composite to HDMI. With Ed's awesome composite
> > boards for the Coco2, might do a decent job for a Coco2 as well.
> >
> > I found several YouTube vids for this same device used with various
> gaming
> > consoles via scart. Just search for scart.
> >
> > -Mike
> >
> >
> >
> >
> >
> >
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> >
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