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

Michael Rowen mike at borncoco.com
Thu Apr 30 10:03:54 EDT 2015


That would be a 74LS266 (XNOR).







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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