VGA Full Form in Computer | Full Form of VGA in Computer




VGA Full Form - Video Graphics Array

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 Video Graphics Array

Video Graphics Array

  • VGA stands for Video Graphics Array. It’s a display hardware developed by IBM in 1987. It has the first introduced with IBM PS/2 line of computers.
  • It provides a resolution of 640x480 pixels and a refresh rate of 60 Hz.
  • VGA is referred as an array instead of an adopter because it has the implemented from the beginning as a single chip (ASIC). It uses analog signals instead of digital signals.

Technical Specifications

  • The original VGA has the following specification:
    • 256 kB Video RAM.
    • 16-color and 256-color paletted display modes.
    • 262,144-color global palette (6 bits, and therefore 64 possible levels, for every one of the red, green, and blue channels via the RAMDAC).
    • Selectable 25.175 MHz or 28.322 MHz master pixel clock.
    • Usual line rate fixed at 31.469 kHz.
    • Maximum of 800 horizontal pixels.
    • Maximum of 600 lines.
    • Refresh rates at up to 70 Hz.
    • Vertical blank interrupt.
    • Planar mode: up to 16 colors (4-bit planes).
    • Packed-pixel mode: 256 colors (Mode 13h).
    • Hardware smooth scrolling support.
    • No hardware sprites.
    • No Blitter, but supports very fast data transfers via "VGA latch" registers.
    • Barrel shifter.
    • Split screen support.
    • 0.7 V peak-to-peak.
    • 75 ohm double-terminated impedance (18.7 mA, 13 mW).
 Technical Specification

Technical Specification

Shape and Size

  • A VGA connector is formed like a trapezoid and its 15 pins. If you have an old monitor designed for the older standards may not be able to work with Video Graphics Array standards.

Compatibility

  • The older VGAs provide a resolution of 640x480 pixels. After that version, many revisions are introduced.
  • The most common version of VGA is Super VGA (SVGA). It allows for resolutions greater than 640x480, like 800x600 or 1024x768.


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