eXtended Graphics Array definition hardware
(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
released at a similar time.