[Coco] S-video Prospects...

[Gene Heskett]

On Wednesday 25 January 2006 23:14, Chris Hawks wrote:
>John & Stephen:
>
>    I built the RGB to S-Video adapter and it works great, EXCEPT...
>On the 80 column screen (and maybe the 40 column, it's har to tell),
> I'm missing a few dots at the beginnig of the lines. About 1/2 a
> character on the 80 column screen. Either of you see this??
>
>    My circuit is right off the data sheet, except for the 75 ohm
>resistors on the R, G, abd B lines. I used 33 and 47 ohm resistors:
>
>     33
>---/\/\/--------||-----
>Coco       |           ad724
>           /
>           \ 47
>           /
>           \
>
>          GND
>(1.2v * 47 / 75 = 7.5v)
>
>    Does the same with 2  75 ohm resistors.
>
>John:
>    What did the display look like before you changed the crystal's
>capacitor???

That sounds like maybe the sync is too well noise filtered, Chris.  
Filtering equals a delay, which would slide the video to the left.

>
>Christopher R. Hawks
>HAWKSoft

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