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Super VGA

Super VGA
Typical VLB SVGA card
Release dateAugust 31, 1987; 37 years ago (1987-08-31)
ArchitectureChips and Technologies 82c441, ET3000
History
PredecessorVideo Graphics Array
SuccessorXGA

Super VGA (SVGA) is a broad term that covers a wide range of computer display standards that extended IBM's VGA specification.[1]

When used as shorthand for a resolution, as VGA and XGA often are, SVGA refers to a resolution of 800 × 600.[2]

History

Comparison between common display resolutions, including several resolutions defined for Super VGA by VESA BIOS Extensions

In the late 1980s, after the release of IBM's VGA, third-party manufacturers began making graphics cards based on its specifications with extended capabilities. As these cards grew in popularity, they began to be referred to as "Super VGA".

This term was not an official standard, but a shorthand for enhanced VGA cards which had become common by 1988.[1] The first cards that explicitly used the term were Genoa Systems's SuperVGA and SuperVGA HiRes in 1987.[3]

Super VGA cards broke compatibility with the IBM VGA standard, requiring software developers to provide specific display drivers and implementations for each card their software could operate on. Initially, the heavy restrictions this placed on software developers slowed the uptake of Super VGA cards, which motivated VESA to produce a unifying standard, the VESA BIOS Extensions (VBE), first introduced in 1989,[4] to provide a common software interface to all cards implementing the VBE specification.[5]

Eventually, Super VGA graphics adapters supported innumerable modes.

Specifications

Simulated SVGA 640 × 400 image (corrected for aspect ratio)
Simulated SVGA 640 × 480 image

The Super VGA standardized the following resolutions:[4]

  • 640 × 400 or 640 × 480 with 256 colors
  • 800 × 600 with 24-bit color depth
  • 1024 × 768 with 24-bit color depth
  • 1280 × 1024 with 24-bit color depth

SVGA uses the same DE-15 VGA connector as the original standard, and otherwise operates over the same cabling and interfaces as VGA.

Early manufacturers

Some early Super VGA manufacturers and some of their models, where available:

  • ALiCat M3147V SVGA video card
    ALiCat M3147V SVGA video card
  • Cirrus Logic GD5429 VLB SVGA video card
    Cirrus Logic GD5429 VLB SVGA video card
  • Early 1996 IGS IGA1682_A PCI SVGA video card
    Early 1996 IGS IGA1682_A PCI SVGA video card
  • S3 805 VLB SVGA video card
    S3 805 VLB SVGA video card
  • WDC ISA SVGA video card
    WDC ISA SVGA video card

References

  1. ^ a b Richter, Jake (1990-07-16). "High-Resolution Video Boards". InfoWorld. 12 (29). InfoWorld Media Group, Inc.: 55. ISSN 0199-6649.
  2. ^ "Projector Guide - Resolution | Epson US". epson.com. Retrieved 2020-08-17.
  3. ^ Gabel, David (December 1, 1987). "Plug-compatible vendors take aim at VGA card". PC Week. 4 (48). Ziff-Davis: 148 – via Gale.
  4. ^ a b "SUPER VGA BIOS EXTENSION Standard # VS891001 › Gemixtes". 2013-12-11. Archived from the original on 2013-12-11. Retrieved 2022-12-27.
  5. ^ VESA BIOS Extension (VBE) Core Functions Standard 3.0 (PDF). Milpitas, CA: Video Electronics Standards Association. 16 September 1998. p. 3.
  6. ^ Juris, Robbin; Miller, Catherine; Ricciardi, Salvatore; Tate-Austin, Priscilla (1988-11-15). "Small-Footprint 386 PCs". PC Mag. 7 (2). Ziff Davis, Inc.: 98. ISSN 0888-8507.
  7. ^ stason.org, Stas Bekman: stas (at). "AST VGA PLUS (202262-001, 002, 003) video card Settings and Configuration". stason.org. Retrieved 2022-12-27.
  8. ^ a b Unknown ATI 8-bit videocard, Google Groups
  9. ^ Need info on old Video Seven VGA card, Google Groups
  10. ^ stason.org, Stas Bekman: stas (at). "SUPERVGA HIRES-10 5200-10, SUPERVGA 5100 video card Settings and Configuration". stason.org. Retrieved 2022-12-27.
  11. ^ "Motherboards/Laptops built-in graphics".
  12. ^ stason.org, Stas Bekman: stas (at). "DESIGNER VGA video card Settings and Configuration". stason.org. Retrieved 2022-12-27.
  13. ^ stason.org, Stas Bekman: stas (at). "PARADISE VGA PLUS 16 video card Settings and Configuration". stason.org. Retrieved 2022-12-27.
  14. ^ VGA, or what to do with my tax return!, Google Groups
  15. ^ VGA monitor and adapter choices, Google Groups
  16. ^ IBM's EGA and VGA, Google Groups
  17. ^ Poor, Alfred (July 1989). "VGA and NTSC: Putting your Program on TV". PC Mag. 8 (13). Ziff Davis, Inc.: 158. ISSN 0888-8507.
Quelle: https://en.wikipedia.org/wiki/Super_Video_Graphics_Array