Re: PET video to VGA

From: Marko Mäkelä <>
Date: Wed, 18 Dec 2013 09:12:01 +0200
Message-ID: <20131218071201.GB4060@x220>
On Wed, Dec 18, 2013 at 05:44:13PM +1100, Daniel O'Shea wrote:
>Apparently SCART may have either RGB or S-Video depending on the 

It may even have both, like my 14" Sony has, IIRC. The presence of an 
RGB signal may need to be signalled with a voltage on a SCART pin.  

I guess that this is a somewhat academic question, because in my attic, 
I do have a working Commodore 1084 monitor (aka Philips CM8833) that 
accepts analog RGB, digital RGBI, and Y/C as well as composite video.

Actually, before I got the 1084 for free, I had modified my Sony TV so 
that it would output a voltage on some unused SCART pin, and I could use 
a loopback inside the SCART plug to signal the presence of RGB. With 
this and a D/A converter built from a resistor ladder, I could see C128 
VDC RGBI output on the TV. I had a switch at the SCART end of the cable, 
so that I could choose between VIC-IIe and VDC screen. Not as handy as 
the 1084, which has a switch in the front panel.


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Received on 2013-12-18 08:00:14

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