资料来源 : Free On-Line Dictionary of Computing

video memory
     
         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)