[Coco] RGB/VGA/Svid

RJRTTY at aol.com RJRTTY at aol.com
Sat May 27 16:50:44 EDT 2006

In a message dated 5/27/06 2:51:00 P.M. Eastern Daylight Time,  
vchester at setec-cr.com writes:

>I'm still wanting to run Roy's VGA AND Chris' Svid adapters at the  same
>time, and keep a Coco standard RGB output in reserve. That makes  three video
>outs using the single RGB header. Only two would be used  simultaneously. But
>since I'm planning on putting it all into a PC case,  I don't want to have to
>open 'er up and pull cables to switch from one to  another.

>Would it be possible to have three sets of transistors Q5,  Q6 & Q7 (with
>their resistors of course) one set each to drive the  two adapters and the
>one Coco standard RGB simultaneously? What about  Hsync and Vsync? Would
>these need separate drivers as well?  How?


It would be easier to clip the input resistors on either my converter  or
on chris' S-video converter then you could connect them both at the
same time.  The sync signals can be combined without any  modifications.

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