VGA Full Form

VGA full form is “Video Graphics Array”. VGA standard was first launched by IBM. It incorporates analogue signals, delivers a 640×480 resolution screen with 16 colours at a certain time and a refresh rate of 60 Hz. VGA standard shows a maximum of 256 colours at a time from the 262, 144 colours collection. It comprises a 6-Bit Digital to Analog converter to convert analogue red, green and blue (RGB) signals.

VGA Cable Full Form

VGA cable full form is Video Graphics Array connector is a basic connector used for computer video output. With the emergence of the 1987 IBM PS/2 and its VGA graphics system, the 15-pin connector went on to become omnipresent on PCs, as well as many projectors, monitors and high definition television sets.

History of VGA

VGA was initially introduced by IBM for its PS/2 line of PCs in 1987. The original VGA chipset (graphics card), was the first to provide the ability for exhibiting up to 16 colours at a screen resolution of 640 × 480 pixels. Even at a lower resolution of 320 × 200 pixels, VGA could show up to 256 colours which made it easier to supply lowercase letters.

Other producers soon created graphics cards showing thousands to millions of colours but they were all supersets of VGA, the extension of VGA i.e. the basis of all these graphic cards are similar since VGA is supported by all PCs. Due to this, it was used during the original mode of loading of operating systems (OS). For example, Microsoft Corporation’s Windows OS loaded its iconic opening splash screen in Video Graphics Array colour.

Key Features Of VGA

VGA full form in computer Video Graphics Array and following are the characteristics of VGA:-

• Resolution: VGA submits a resolution of 640×480 pixels having 16 colours at a time.

• Refresh Rate: VGA contains a refresh rate of 60 Hz.

• Memory: VGA contains a memory utilization of 256k and it doesn’t consist of any supplementary memory.

• Output Capability: VGA aids both alphanumeric text modes and all Points Addressable graphics modes.

• Colour: VGA exhibits a maximum of 256 colours every so often from the 262, 144 colour collection.

Uses Of VGA Or Video Graphics Array

VGA stands for Video Graphics Array. It is display hardware instituted by IBM in 1987. It was initially introduced with the IBM PS/2 line of computers and offers a resolution of 640x480 pixels and a refresh rate of 60 Hz. VGA is referred to as an array rather than an adopter since it was executed from the start as a single chip (ASIC). It uses analogue signals instead of digital signals.

Advantages Of VGA

Features of VGA offer an array of advantages that are listed below:-

• Supported by all Personal Computers (PCs) from any manufacturer.

• Contains only one standard and no versions.

• If the tool has a VGA-out, it will appropriately connect to a VGA-in.

• VGA signals are analogue signals, which means they will be more accurate than digital signals

• VGA made it simpler to small letter characters and improved on the clarity

• VGA had been an improvement over the earlier predecessors such as the Enhanced graphic adapter that generated a maximum resolution of 320×200 pixels

• Signals of VGA can be easily split with easy distribution amplifiers. This makes VGA such a simple system to use.

• VGA cables can be used as a “universal” analogue cable capable of transmitting RGBHV, YPbPr, composite, and s-video signals.

Disadvantages of VGA

Besides benefits, VGA has disadvantages too:-

• VGA computer is older technology with a restricted amount of supported resolution.

• VGA cables should be a greater gauge for longer runs.

• The colour capability of VGA is less than its successors.

Shape and Size of VGA

A VGA connector system is shaped like a trapezoid and contains 15 pins. If you have an old monitor devised for the older standards may not be able to function with VGA standards.

Compatibility of VGA

The older Video Graphics Array offers a resolution of 640x480 pixels. After that version of VGA, many revisions have been initiated. The most common version of that is Super VGA (SVGA). It enables resolutions higher than 640x480, like 800x600 or 1024x768.

Technical Specifications of VGA

The original VGA consists of the following specification:

• Video RAM of 256 kB

• Maximum of 800 horizontal pixels and Maximum of 600 lines

• Refresh rates at up to 60Hz.

• Palette displays modes of 16-color and 256-color

• 262,144-color global palette (6 bits, and thus 64 possible levels, for each of the red, green, and blue channels through the RAMDAC)

• Selectable 28.322 or 25.175 MHz MHz master pixel clock

• General line rate definite at 31.469 kHz

• Vertical blank break-in

• Planar mode: 4-bit planes (up to 16 colours)

• Packed-pixel mode: Mode 13h (256 colours)

• Hardware smooth scrolling support and Split screen support

• Barrel shifter

• 0.7 V peak-to-peak double-terminated impedance of 750mh (18.7 mA, 13 mW)

• No hardware sprites, No Blitter, but supports rapid data transfers through "VGA latch" registers.

Other Full Forms of VGA

You know what is the full form of VGA, but you must also know that VGA stands for different many categories across different sectors that are as given in the table:-