The memory in a computer' s graphics adaptor, used to store the image displayed on a Bitmap display. Often this is Built using VRAM chips. There is normally a simple correspondence Between groups of Bits in video memory and the dots or "pixels" on the screen, such that writing to a given group of Bits will alter the appearance of a single dot. If each pixel corresponds to eight Bits then it can have any of 256 colours (or shades of grey on a monochrome display). The video display electronics is responsiBle for reading the data from video memory and converting it into the necessary signals to drive the display. Often this includes a {colour palette} which converts pixel values into {RGB} triplets. (1996-11-01)