XGA+

From Wikipedia, the free encyclopedia

XGA+ stands for eXtended Graphics Array Plus and is a computer display standard. XGA+ is often used on 17 inch desktop CRT monitors. XGA+ is usually understood to refer to the 1152×864 resolution with an aspect ratio of 4:3. As LCD screens are getting increasingly popular, this resolution is decreasing in use, but it is the native resolution of some 17 inch 4:3 LCD displays.

Historically, the resolution relates to the earlier standard of 1152×900 pixels, which was adopted by Sun Microsystems for the Sun-2 workstation in the early 1980s. This resolution is close to the maximum practical which, using one byte per pixel, can fit into a video memory or frame-buffer of one megabyte. However, its aspect ratio is 3.84:3. When Apple Computer defined a standard resolution for 21-inch CRT monitors, intended for use as Two-Page Displays on the Macintosh II computer, Apple selected instead 1152×864, which is the highest 4:3 resolution below one million pixels.

XGA+ is the next step after XGA (1024×768), although it's not approved by any standard organizations. The next step with an aspect ratio of 4:3 is 1280×960 ("SXGA-") or SXGA+ (1400×1050).

[edit] Comparison chart

This box: view • talk • edit	x (width)	y (height)	Mega- pixels	Aspect Ratio	Percentage of difference in pixels					Typical sizes	Non-wide version	Note
Name	x (width)	y (height)	Mega- pixels	Aspect Ratio	Wide XGA	WSXGA	WSXGA+	WUXGA	WQXGA	Typical sizes	Non-wide version	Note
Wide XGA	1366	768	1.05	1.78		−19%	−41%	−54%	−74%	15"–19"	XGA
WSXGA Wide XGA+	1440	900	1.3	1.6	+24%		−27%	−44%	−68%	15"–19"	XGA+
WSXGA+	1680	1050	1.76	1.6	+68%	+36%		−23%	−57%	20"–22"	SXGA+
WUXGA	1920	1200	2.3	1.6	+120%	+78%	+31%		−44%	23"–28"	UXGA	1080p (1920x1080) video.
WQXGA	2560	1600	4.1	1.6	+290%	+216%	+132%	+78%		30"+	QXGA	Compliments portrait UXGA