D-USB is VGA. VGA (Video Graphics Array) is a video transmission standard launched by IBM with the PS/2 machine in 1987. It has the advantages of high resolution, fast display speed, rich colors, etc., and has been widely used in color displays.
VGA standard
VGA (Video Graphics Array) is a video graphics array that was released by IBM in 1987 with the PS/2 machine (PS/2 originally meant "Personal System 2". "Personal System 2" was launched by IBM in 1987. A kind of personal computer. The keyboard and mouse interface used on PS/2 computers is the current PS/2 interface.
Because the standard was not open, PS/2 computers failed in the market. Only the PS/2 interface is still in use today. ), a video transmission standard that uses analog signals, was introduced. It had the advantages of high resolution, fast display speed, and rich colors, and was widely used in the field of color displays.
This standard is outdated for today's PC market. Even so, VGA is still a standard supported by most manufacturers, and personal computers must support the VGA standard before loading their unique drivers.
For example, the startup screen of Microsoft Windows series products still uses VGA display mode, which also illustrates its importance and compatibility with display standards.
2. VGA display and VGA timing implementation:
The general VGA display card system mainly consists of a control circuit, display buffer area, and video BIOS (Basic Input Output System) program.
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