Can I use monocrome monitors with my VGA card ?
You can use monocrome monitors with the VGA card if the interface specs and the refresh rate match what your VGA card can output. There original VGA card supported a monocrome VGA monitor si that the monitor take all it’s picure information from GREEN wire and the sync signals as the mormal VGA monitor. When the VGA card knew that there was a monocrome monitor connected to it, it programmed the palette to be a grayscale palette. So monocrome VGA monitor saw all the picture material in grayscale format. Nowadays the monocrome monitors are practically not used in modern PC systems, so the support for those does not work todays as well as it used to be (VGA card might not support the moncrome monitor detection well ot the software overrides the monocrome settings). The most foolproof way to do the conversion is to make an external circuit which combines RGB signals to one monocrome video signal. The signals can be combined with set of resistors as in the circuit below: VGA CONNECTOR ____
