Video card, graphics adapter
A typical personal computer consists of a video graphics adapter providing a frame buffer and graphics acceleration hardware, together with a software device driver providing an interface between the graphics adapter hardware and the operating system. Graphics display subsystems are employed to facilitate a variety of graphics tasks and applications including computer-assisted drafting, architectural design, simulation trainers for aircraft and other vehicles, molecular modeling, virtual reality applications, and video games. The video card typically includes a bus interface circuit, a dedicated processor, random access memory (RAM), and a digital-to-analog converter. The video card is controlled by the central processing unit (CPU) of the computer system and receives digital data representative of an image to be displayed from the computer system memory or from an input device coupled to the computer system bus. A computer provides information via video signals that are received and displayed on a computer monitor. The video signals commonly in use today including MDA, CGA, EGA, VGA, super VGA, and XGA. A VGA card internally processes video information transmitted from the CPU in its own chipset and transmits the processed information to a monitor to allow a user to view text or graphics.
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