vga顯示模式

VGA：視頻圖形陣列 (VGA: Video Graphics Array)

VGA is an abbreviation of "Video Graphics Array".

VGA是“視頻圖形陣列”的縮寫 。

It is a three-row 15-pin DE-15 connector display hardware developed by IBM in 1987. It was first launched with the IBM PS/2 line of computers. It makes available a resolution of 640x480 pixels and a refresh rate of 60 Hz.

它是由IBM在1987年開發的三排15針DE-15連接器顯示硬件。它首先與IBM PS / 2系列計算機一起推出。 它提供了640x480像素的分辨率和60 Hz的刷新率。

VGA has alluded as an array at the place of an adopter because it was put into operation from the beginning as a single chip (ASIC). It uses analog signals as opposed to digital signals.

VGA被稱為采用陣列，因為它是從一開始就作為單芯片(ASIC)投入使用的。 它使用模擬信號而不是數字信號。

Image source: https://www.indiamart.com/proddetail/projecter-vga-cable-20078614862.html

圖片來源：https://www.indiamart.com/proddetail/projecter-vga-cable-20078614862.html

VGA的技術規格 (Technical Specifications of VGA)

Following are the technical specifications provided in the original VGA, which are:

以下是原始VGA中提供的技術規格：

• 256 kB Video RAM

  256 kB視頻RAM

• 16-color and 256-color paletted display modes.

  16色和256色調色板顯示模式。

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

  262,144色全局調色板(通過RAMDAC的每個紅色，綠色和藍色通道為6位，因此有64種可能的色階)

• Selectable 25.175 MHz or 28.322 MHz master pixel clock

  可選25.175 MHz或28.322 MHz主像素時鐘

• Usual line rate fixed at 31.469 kHz

  通常的線速固定為31.469 kHz

• Maximum of 800 horizontal pixels

  最多800個水平像素

• Maximum of 600 lines

  最多600條線

• Refresh rates at up to 70 Hz

  刷新率高達70 Hz

• Vertical blank interrupt

  垂直空白中斷

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

  平面模式：最多16種顏色(4位平面)

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

  填充像素模式：256色(模式13h)

• Hardware smooth scrolling support

  硬件平滑滾動支持

• No hardware sprites,

  沒有硬件精靈，

• No Blitter, but supports very fast data transfers via "VGA latch" registers.

  無抖動，但通過“ VGA鎖存器”寄存器支持非常快速的數據傳輸。

• Barrel shifter

  桶式移位器

• Split screen support

  分屏支持

• 0.7 V peak-to-peak

  峰峰值為0.7 V

• 75 ohm double-terminated impedance (18.7 mA, 13 mW)

  75歐姆雙端接阻抗(18.7 mA，13 mW)

VGA形狀和大小 (VGA Shape and Size)

• A VGA connector is shaped like a trapezoid and it has 15 pins.

  VGA連接器的形狀像梯形，有15個針腳。

• If a user has an old designed monitor according to the older standards, then it may not be able to operate with Video Graphics Array standards.

  如果用戶具有根據舊標準設計的舊顯示器，則它可能無法使用視頻圖形陣列標準進行操作。

VGA相容性 (VGA Compatibility)

• The older VGAs make available a resolution of 640x480 pixels.

  較舊的VGA提供640x480像素的分辨率。

• After that older version, many modifications have been launched.

  在該舊版本之后，已啟動了許多修改。

• The highly general version of VGA is Super VGA (SVGA). It enables resolutions better than 640x480, such as 800x600 or 1024x768.

  VGA的高度通用版本是Super VGA(SVGA)。 它可以提供比640x480更好的分辨率，例如800x600或1024x768。

VGA設計 (VGA Design)

• VGA connectors and cables transmit analog component RGBHV which are red, green, blue, horizontal sync, vertical sync video signals, and VESA Display Data Channel (VESA DDC) data.

  VGA連接器和電纜傳輸模擬分量RGBHV，它們是紅色，綠色，藍色，水平同步，垂直同步視頻信號和VESA顯示數據通道(VESA DDC)數據。

• The IBM 8513 monitor defined pin 5 as "Self Test", which put on view a white screen when the cable is disjointed.

  IBM 8513監視器將插針5定義為“自檢”，當電纜斷開連接時，白屏顯示。

• The IBM PS/55 Display Adapter defined pin 9 as "+12V". It switches on the exact monitor when the system component is powered on.

  IBM PS / 55顯示適配器將引腳9定義為“ + 12V”。 當系統組件打開電源時，它將打開確切的監視器。

翻譯自: https://www.includehelp.com/dictionary/vga-full-form.aspx

vga顯示模式