[Coco] is there any existing 6847 output to RGB ? (for coco2)

[Luis Antoniosi (CoCoDemus)]

No it's pure analog. It just does the color conversion.

I didn't get into making the rgb2vga to understand the YCbCr. I'm too lazy
to build a driver.

Luis Felipe Antoniosi



On Thu, Feb 19, 2015 at 3:27 PM, Zippster <zippster278 at gmail.com> wrote:

> Yes, if it’s just a bunch of transistors (no comparators or adc) then it
> must be mixing the component signals to RGB while keeping it all analog.
>
> I’m working on one (Digitize —> RGB —> DAC —> VGA) but have a way to go
> yet.
>
> - Ed
>
>
> > On Feb 19, 2015, at 2:16 PM, Luis Antoniosi (CoCoDemus) <
> retrocanada76 at gmail.com> wrote:
> >
> > Well I do have a coco2 peritel with a RGB output for SCART TVs. It does
> > everything on transistors, actually a transistor plantation...
> >
> > I think it does a YCbCr -> RGB conversion. The VDG outputs YCbCr.
> >
> >
> > Luis Felipe Antoniosi
> >
> >
> >
> > On Thu, Feb 19, 2015 at 3:04 PM, didier derny <didier at aida.org> wrote:
> >
> >> Is there any existing 6847 output to  rgb board / schematics
> >>
> >>
> >>
> >> I've just seen the pinout of a RGB video connector
> >>
> >> But the video in the machine is done by a 6847
> >>
> >>
> >>
> >> The schematics are hard to read  and there are a lot of transistors
> >>
> >> Between the video signal on the 6847 and the connector.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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