Here's a little hack I came up with tonight. I needed to run a RGBS color monitor from a Joust board, which has inverted, separate syncs (yes, I know it also has composite sync and it can be inverted, but I needed a board to try this on :-) Take a 74C04 inverter, wire two of the inputs to H and V, wire or the outputs (I told you it was a hack...) and run it through two more inverter stages. take two diodes, tie them to H and V sync, add a 20uF capacitor, and use it to power the CMOS inverter. It works fine as long as the output load isn't too high (disable the 75 ohm termination of the sync input) ..and only 4 wires (Hsync Vsync, gnd, and HVsync out) Someone else has probably thought of this (I know we used it at Apple for the self-powered Apple MIDI interface)... --author unknown