WARNING: This site is intended for online use only; mass-downloading of pages degrades the server and is prohibited.
If you attempt to use tools to mass-download the site, you may be blocked permanently by automated software.
If you want to read this CertiGuide offline, please use one of the links on the left to purchase a convenient PDF copy. Thank you.

Read this whole guide offline with no ads, for a very low price!
Click Here!

Custom Search






Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 9: Graphic Cards
      9  Card Components, Modes and Architecture

Previous Topic/Section
Display Modes
Previous Page
Pages in Current Topic/Section
1
Next Page
Buses: PCI and AGP
Next Topic/Section

SVGA/XGA

VGA was adequate, and the being the first proper "standard" in video cards it was widely used. However IBM's XGA and 8514/A adapters were superior in terms of resolution and colour depth, so third party manufacturers created SuperVGA. It is unclear why these manufacturers chose to develop a new standard for higher resolutions with greater bit depth when IBM already had a chipset that provided this, but the logical guess is that it was easier to enhance VGA than to adapt XGA to be VGA compatible. Again, we were back to standards hell. Because it was 3rd party manufacturers and not VESA that created SVGA, all the implementations differed. To try to resolve this, VESA created an SVGA standard. However, instead of defining the implementation of SVGA as it did with VGA, VESA defined a standard interface called VESA BIOS Extensions (or VBE). This allowed developers to use once again a common interface to work with different makes and models of graphics card.

Whilst the capabilities and power of graphics cards have changed, this interface has not. Super VGA and the VESA BIOS Extensions are still in use on graphics cards today.


Previous Topic/Section
Display Modes
Previous Page
Pages in Current Topic/Section
1
Next Page
Buses: PCI and AGP
Next Topic/Section

If you find CertiGuide.com useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider buying an inexpensive PDF equivalent of the CertiGuide to A+ (A+ 4 Real) from StudyExam4Less.com. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005

Adapted with permission from a work created by Tcat Houser et al.
CertiGuide.com Version Copyright 2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.