[Coco] [coco3] upscan video converter

[RJRTTY at aol.com]

In a message dated 7/16/05 11:26:34 AM Eastern Daylight Time, 
roger at newfoal.com writes:

<< How has this device worked in tests?  I'm mainly interested in how crisp 
 the video is and if artifacts are preserved.  It's no big deal if artifacts 
 are not preserved since the main value of this device to me would be to be 
 able to connect a real nice VGA monitor to the CoCo and get some video 
 that's not too fuzy at 80 columns text. >>

   I displayed it at the last cocofest in chicago.   On that monitor there
were no artifacts.   The design schematic I based it on did use
a bunch of ferrite beads to seperate different supplies.    It even seperated
multiple analog supplies from each other even with the same voltage.
What i did was use only one filter
to seperate analogue from digital supplies on the same regulator.
This used only two ferrite beads as opposed
to 10 or 12.     But the image didn't suffer.   The image looks like
it was painted on.  It was very high quality.    That was one of the
reasons I committed to the project.     I wouldn't waste my time otherwise. :)

I sent Torsten Dittel a prototype to play with.   I''m sure we'll hear about
it soon.   Warts and all.....

Roy