Superboard Colour RGB and composite interface

Steve Gray
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Joined: Mon Oct 06, 2008 1:54 pm
Location: Markham, Ontario, Canada
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Re: Superboard Colour RGB and composite interface

Post by Steve Gray » Wed Jul 31, 2019 3:10 am

Scott Larson wrote:
Wed Jul 31, 2019 1:02 am
I always wondered how OSI did NTSC color. It looks like the circuit relies on the slight delay of a 7404 to jab the subcarrier at the right phase to produce a color. That can't possibly work.
The 540b circuit was “borrowed” from Don Lancaster’s video cookbook... it works. The 630 board doesn't do colour composite as far as i can see, it only incorporates the invert feature.

My 600d Colour board will not do composite. I wanted something that would provide RGB as the highest quality source, which could be converted in many ways. You can upconvert it to hdmi, or feed it directly to scart, or convert to s-video and composite... whatever you like. I will try to document the different solutions. I could make a little adapter board for composite if there is demand.
C4P working, C1P working. 600D Replica working, C4P+D&N floppy not working. 505 board, 610 board, Mittendorf board, TOSIE hacker board need testing, PicoDOS disk untested.

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