Quote:
Originally Posted by jhalphen
Would the software accept a 720p/50 VGA signal providing a hardware interface could be built to input a VGA signal to your composite input ?
Only the Y channel would be needed.
Over here in France, there is a growing interest to see what "true 819 line resolution" looked like. Because of HDMI/HDCP licensing issues, this input format is impossible, but VGA is.
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You don't need a system converter to do that, you can get an 819 line monochrome signal directly from the VGA port of a computer graphics card.
by using a programme called WinModelines.
Here is my system working with a Windows 10 computer with an ATI Radeon HD 2400 XT card. These are available for about 10 Euros on ebay, and you only need to build a modulator.
https://youtu.be/ahzdx4KgWBg
I just tried an 819 line modeline which came from Semir_DE Linux project
https://www.vintage-radio.net/forum/...d.php?t=167674
(It's
much simpler with Windows)
and I get this result on my 405 line set, the two side-by-side pictures exactly as we got the French Sporadic-E interference in the 1960s!