Even though I started off on CGA, I never knew that the composite was much better. Â Oh well the things you learn far too late. Â But to be honest, EGA looked so much better, and sharper. Â Not to mention the Commodore Amiga on composite sets.
Virtually Fun
Fun with Virtualization
Wikipedia has a reasonable write up on the Composite artifact colors used in CGA and other systems – https://en.wikipedia.org/wiki/Composite_artifact_colors. I have a CGA card floating around with the Composite jack on it I’ll have to give it a go if I can find a machine that will fit a full-size ISA card in that is…
A similar technique was often used to do blending effects on consoles, especially in the 16-bit era. There’s some examples at http://retro-sanctuary.com/comparisons%20-%20differing.html and http://www.chrismcovell.com/gotRGB/rgb_compare2.html