My well thought out Amiga 1000 still has a port where you plug a RF modulator into. It seems to be the same separated composite port that fits a C=64 128 video cable. In it you can plug in a cable designed for a 1702 monitor that has separated chroma and luma (hey just like S-VIDEO before it came out but different size connector)..
Someone used to make a cable that plugged in that did 64/128/a1000 to SVIDEO direct using that same port.. Also someone made a composite/S-video adapter for the RGB port that was broadcast quality for cheap. I remember that in toaster world magazine.
Hope that helps some..
