The video adapter card provides the interface between the mother board and the display monitor.
The original IBM PCs and XTs offered two types of display adapters, a Monochrome (single color) Display Adapter (MDA) and a Color Graphic Adapter (CGA). Both of these units also included the system's first parallel printer port connector.
These initial units have been followed by a number of improved and enhanced video adapters and monitors. The most common type of video adapter card currently in use is the Video Graphic Array (VGA) card, The system uses it to control video output operations.
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