资料来源 : Free On-Line Dictionary of Computing

display standard
     
         {IBM} and others have introduced a bewildering
        plethora of graphics and text display {standards} for {IBM
        PCs}.  The standards are mostly implemented by plugging in a
        video display board (or "{graphics adaptor}") and connecting
        the appropriate monitor to it.  Each new standard subsumes its
        predecessors.  For example, an {EGA} board can also do {CGA}
        and {MDA}.
     
        With the {PS/2}, IBM introduced the {VGA} standard and built
        it into the main system board {motherboard}. VGA is also
        available as a plug-in board for PCs from third-party vendors.
        Also with the PS/2, IBM introduced the {8514} high-resolution
        graphics standard.  An 8514 adaptor board plugs into the PS/2,
        providing a dual-monitor capability.
     
        Graphics software has to support the major IBM graphics
        standards and many non-IBM, proprietary standards for
        high-resolution displays.  Either software vendors provide
        {display drivers}, or display vendors provide drivers for the
        software package.  In either case, switching software or
        switching display systems is fraught with compatibility
        problems.
     
         Display    Resolution Colours Sponsor	Systems
     
         MDA	    720x350 T	  2   	IBM     PC
         CGA	    320x200	  4   	IBM     PC
         EGA	    640x350	 16   	IBM     PC
         PGA	    640x480	256   	IBM     PC
     
         Hercules   729x348	  2   non-IBM	PC
     
         MCGA	    720x400 T
        	    320x200 G	256		PS/2
     
         VGA	    720x400 T
        	    640x480 G	 16
     
         SVGA	    800x600	 16	VESA
     
         XVGA	   1024x768	256	(IBM name: 8514)
     
        T: text,  G: graphics.
     
        More colours are available from third-party vendors for some
        display types.
     
        See also {MDA}, {CGA}, {EGA}, {PGA}, {Hercules}, {MCGA},
        {VGA}, {SVGA}, {8514}, {VESA}.