(XGA) An IBM display standard introduced in 1990.
XGA supports a resolution of 1024 x 768 pixels with a palette of 256 colours, or 640 x 480 with high colour (16 bits per pixel).
XGA-2 added 1024 x 768 support for high colour and higher refresh rates, improved performance, and supports 1360 x 1024 in 16 colours.
XGA is probably not the same as 8514-A.
See also VESA's EVGA released at a similar time.