[Coco] The CoCo to VGA adapter
chazbeenhad at hotmail.com
Sun Jul 27 09:51:12 EDT 2008
<RJRTTY at aol.com> wrote in message
news:d1d.2d1e9570.35bcfab1 at aol.com...
> There is one minor detail you should know about the converter.
> Well it is really about the coco3. The coco3 generates the
> three primary colors slightly out of sync with each other and
> the pixel clock. Green is in sync with the pixel clock but
> red is slightly out of sync and blue is WAY out of sync.
> What all of this means is that text looks good with
> black on a pure green backround. Text looks ok with a black
> on a pure red backround but text looks terrible with a black
> on pure blue backround. The reason this doesn't show up
> with say a CM8 monitor is that the bandwidth is so much
> smaller with the old monitors that they "soak up" this
> distortion but the bandwidth of my converter on an SVGA
> monitor is greater and shows the original signal warts and all.
> The converter uses special input filters to correct this to some
> extent but it cannot eliminate it completely. The bottom line is
> to avoid pure blue and pure red in text screens.
> Oddly enough blue with just a little green or red looks perfectly
> okay. Same for red with a little green or blue mixed in and all
> other color combinations look okay too. Go figure.......
Hi Roy. Would WIDTH80 CLS3 show the text to be terrible as you say?
I just tried it out with your XRGB adapter and it actually looks fantastic
on my NEC XV15.
Now that I have several LCD flat panels in my home with VGA inputs, I'll be
ordering your VGA
adapter when I can get some extra cash together. It will be nice to play
coco games on a big screen TV.
Everyone gives excellent reviews to your VGA box and it looks so easy to use
vs this XRGB which is a mess of wires.
Plus after you told me yours busted im afraid to move mine :)
More information about the Coco