vga显示模式_VGA的完整形式是什么？

vga显示模式

VGA：视频图形阵列 (VGA: Video Graphics Array)

VGA is an abbreviation of "Video Graphics Array".

VGA是“视频图形阵列”的缩写 。

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年开发的三排15针DE-15连接器显示硬件。它首先与IBM PS / 2系列计算机一起推出。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被称为采用阵列，因为它是从一开始就作为单芯片(ASIC)投入使用的。它使用模拟信号而不是数字信号。

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VGA的技术规格 (Technical Specifications of VGA)

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

以下是原始VGA中提供的技术规格：

256 kB Video RAM
256 kB视频RAM
16-color and 256-color paletted display modes.
16色和256色调色板显示模式。
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色全局调色板(通过RAMDAC的每个红色，绿色和蓝色通道为6位，因此有64种可能的色阶)
Selectable 25.175 MHz or 28.322 MHz master pixel clock
可选25.175 MHz或28.322 MHz主像素时钟
Usual line rate fixed at 31.469 kHz
通常的线速固定为31.469 kHz
Maximum of 800 horizontal pixels
最多800个水平像素
Maximum of 600 lines
最多600条线
Refresh rates at up to 70 Hz
刷新率高达70 Hz
Vertical blank interrupt
垂直空白中断
Planar mode: up to 16 colors (4-bit planes)
平面模式：最多16种颜色(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
硬件平滑滚动支持
No hardware sprites,
没有硬件精灵，
No Blitter, but supports very fast data transfers via "VGA latch" registers.
无抖动，但通过“ VGA锁存器”寄存器支持非常快速的数据传输。
Barrel shifter
桶式移位器
Split screen support
分屏支持
0.7 V peak-to-peak
峰峰值为0.7 V
75 ohm double-terminated impedance (18.7 mA, 13 mW)
75欧姆双端接阻抗(18.7 mA，13 mW)

VGA形状和大小 (VGA Shape and Size)

A VGA connector is shaped like a trapezoid and it has 15 pins.
VGA连接器的形状像梯形，有15个针脚。
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.
如果用户具有根据旧标准设计的旧显示器，则它可能无法使用视频图形阵列标准进行操作。

VGA相容性 (VGA Compatibility)

The older VGAs make available a resolution of 640x480 pixels.
较旧的VGA提供640x480像素的分辨率。
After that older version, many modifications have been launched.
在该旧版本之后，已启动了许多修改。
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设计 (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连接器和电缆传输模拟分量RGBHV，它们是红色，绿色，蓝色，水平同步，垂直同步视频信号和VESA显示数据通道(VESA DDC)数据。
The IBM 8513 monitor defined pin 5 as "Self Test", which put on view a white screen when the cable is disjointed.
IBM 8513监视器将插针5定义为“自检”，当电缆断开连接时，白屏显示。
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显示适配器将引脚9定义为“ + 12V”。当系统组件打开电源时，它将打开确切的监视器。