[Coco] Video adapters
Chester A Patterson
vchester at setec-cr.com
Tue May 2 12:18:21 EDT 2006
So, how'd it go running both adapters simultanously?
In a message dated 4/26/06 10:56:47 P.M. Eastern Daylight Time,
chawks at dls.net writes:
> Since they both connect to the Coco3's RGB output, probably not.
>But, If someone wants to build an RGB 'Y' cable, we can try it.
>Christopher R. Hawks
You can do that BUT the input resistance of my converter is 50 ohms.
If Christopher's device also has a low DC resistance (50-75 ohms) then
one or the other must increase it's resistance to avoid overloading the
outputs in order to use them simultaneously..
By the way Chris, if your converter doesn't have a 50-75 ohm
input resistance on the RGB signal lines (not on the sync lines)
then try applying this amount of parallel input resistance and see
if the image improves. The output circuits where designed to drive
this type of load.
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