The VGA graphics adapter is designed to connect monitors to a computer. By the way, at the moment, this type of connection is considered not relevant, since the technology does not stand still and this connector has been replaced with more advanced options for connecting to monitors.
Due to the appearance on the market of monitors made using liquid crystal technology, the capacities of the VGA graphics adapter have become insufficient. Therefore, more advanced types of connectors with great potential began to be inserted into graphic cards.
What is a VGA?
So, the VGA graphics adapter is a connector for analog connection to a computer. This connector appeared in 1987 at IBM, which created such connectors for new generation computers.
In the motherboard, the VGA graphics adapter was connected to the graphics board. The maximum screen resolution that could be supported at that time was 640 x 480 pixels.
Many models of modern graphic video cards support connecting to the VGA graphic adapter connector, but only on monitors whose resolution does not exceed 1280 x 1024 pixels and the screen refresh rate reaches 75 frames. If you connect a monitor of higher resolution via VGA, then large losses in quality will be noticeable and the image will lose its clarity.
VESA DDC
The first version of the standard VGA graphics adapter connector on the monitor was DDC. Released in 1994, this adapter ensured stable operation of the connector and monitor, being able to determine many types of physical flows. Work was supported in EDID 1.0 format.
The next version of this connector, which appeared in 1996, included the already updated EDID format, which supported the unique DDC2B + protocol. A year later, this interface was updated, which entailed the acquisition of an improved protocol - DDC2Bi, in addition, VESA Plug and Display connection support was implemented.
Since 1999, it was decided to replace DDC with E-DDC, but EDID can be found to this day, since it acts as an auxiliary standard, with it you can determine which format was used when compressing the binary file. This file contains information about the properties and modes of the graphic monitor, which are recorded in the memory chip by the manufacturer of the monitor.
Ddc1
The DDC1 connector is a VGA graphics adapter that allows the monitor to transfer all its information to a computer using one-way communication. It works this way - the video card recognizes data information on the cable, then, using vertical clock pulses, synchronously reads it.
Ddc2
This VGA graphic adapter connector already had the ability for two-way data transfer. It looks like this - the monitor transmits its data, and already the computer is automatically tuned to the received data in order to adapt the monitor.
Homemade Cord Extension for VGA
Due to physical capabilities, there are times when extending the VGA graphics adapter cable is simply necessary. The easiest option is to buy a cable of the right length, but then the question arises about its cost, which is exorbitantly high.
Another reason for a homemade option may be pulling the cable into another room. If you make a hole in the wall up to five centimeters in size is not an option, then home-made extension is what you need.
The best option would be to operate the VGA RJ-45 graphics adapter adapter without any rations, because their absence will simplify the task by simply crimping the ends of the twisted pair with a shielded braid.
The best options for extending the VGA cable are the adapter from this port to the tulip plugs.
Now VGA connectors have been replaced by more advanced options for transferring images from a video card to a monitor - this is a DVI connector. But, despite this, many video cards still support this connection option.