[Coco] S-Video mod for Coco1

[Luis Antoniosi (CoCoDemus)]

Just one warning: the LM1889 runs on 12V. You have been warned.



On Mon, Sep 30, 2013 at 3:18 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> Your answer is on IC39. LM1889: It has several chroma inputs. Need to know
> if one of them is useful. I bet on pin 13 Chroma Subcarrier.
>
>
>
>
> On Mon, Sep 30, 2013 at 3:09 PM, Ken H. <dragon.atv at gmail.com> wrote:
>
>> Looking at the Tano motherboard I can't see an MC1372
>> http://archive.worldofdragon.org/images/4/40/Tano64.png
>>
>>
>>
>> On Mon, Sep 30, 2013 at 9:58 PM, Luis Antoniosi (CoCoDemus) <
>> retrocanada76 at gmail.com> wrote:
>>
>> > Is there a chrominance output on it ?
>> >
>> >
>> > On Mon, Sep 30, 2013 at 2:57 PM, Ken H. <dragon.atv at gmail.com> wrote:
>> >
>> > > This is an amazing video quality for the CoCo1 !
>> > > Do you think a similar mod could be done with the Tano Dragon?
>> > >
>> > >
>> > > On Mon, Sep 30, 2013 at 5:59 AM, Luis Antoniosi (CoCoDemus) <
>> > > retrocanada76 at gmail.com> wrote:
>> > >
>> > > > With a very simple driver you can make a perfect a s-video output
>> for
>> > > your
>> > > > coco1
>> > > >
>> > > > http://www.youtube.com/watch?v=47r1S8Sjr20
>> > > > http://www.youtube.com/watch?v=2AYpUA5H5tg
>> > > >
>> > > > https://pbs.twimg.com/media/BVYIpfxCEAAy8kO.jpg:large
>> > > > https://pbs.twimg.com/media/BVYItw_CQAAQupH.jpg:large
>> > > > https://pbs.twimg.com/media/BVYIxdGCcAEMydj.jpg:large
>> > > > https://pbs.twimg.com/media/BVYI0ZaCAAAikiF.jpg:large
>> > > > https://pbs.twimg.com/media/BVYJEVaCQAAJz1z.jpg:large
>> > > > https://pbs.twimg.com/media/BVYJIJQCQAAXWOf.jpg:large
>> > > >
>> > > > Basicaly s-video signal works with 2 signals: Luminance and
>> > chrominance.
>> > > > The luminance you can use the same monochrome driver you are used
>> to, 2
>> > > > transistors tied on Y output from 6847. But the chrominance you get
>> > from
>> > > > 1347 pin 8. A 300 Ohm resistor is needed to reduce the vertical
>> lines.
>> > It
>> > > > worked with 2 monitors an a s-video / vga converter I have here.
>> > > >
>> > > > Check the video how to get artifact colors from it.
>> > > >
>> > > > Didn't test on coco2, dunno if works since the 1372 is connected
>> > > different
>> > > > there.
>> > > >
>> > > >
>> > > > --
>> > > > Long live the CoCo
>> > > >
>> > > > --
>> > > > Coco mailing list
>> > > > Coco at maltedmedia.com
>> > > > http://five.pairlist.net/mailman/listinfo/coco
>> > > >
>> > >
>> > > --
>> > > Coco mailing list
>> > > Coco at maltedmedia.com
>> > > http://five.pairlist.net/mailman/listinfo/coco
>> > >
>> >
>> >
>> >
>> > --
>> > Long live the CoCo
>> >
>> > --
>> > Coco mailing list
>> > Coco at maltedmedia.com
>> > http://five.pairlist.net/mailman/listinfo/coco
>> >
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>>
>
>
>
> --
> Long live the CoCo
>



-- 
Long live the CoCo