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VESA (bus)
VGA
virtual address
VL bus
volatile memory
VRAM
Windows NT™
XGA
Y Signal
Video Electronics Standards Association (or VL bus). An
internal interconnect standard for transferring video
information to a computer display system.
Video Graphics Array (IBM). The third and most common
monitor standard used today. It provides up to 256
simultaneous colors and a screen resolution of 640 x 480
pixels.
A binary address issued by a CPU that indirectly refers to
the location of information in primary memory, such as
main memory. When data is copied from disk to main
memory, the physical address is changed to the virtual
address.
See VESA Local bus (VL bus).
A memory in which the data content is lost when the power
supply is disconnected.
Video (Dynamic) Random Access Memory. Memory chips
with two ports, one used for random accesses and the other
capable of serial accesses. Once the serial port has been
initialized (with a transfer cycle), it can operate
independently of the random port. This frees the random
port for CPU accesses. The result of adding the serial port is
a significantly reduced amount of interference from screen
refresh. VRAMs cost more per bit than DRAMs.
The trademark representing Windows New Technology, a
computer operating system developed by the Microsoft
Corporation.
EXtended Graphics Array. An improved IBM VGA monitor
standard that provides at least 256 simultaneous colors and
a screen resolution of 1024 x 768 pixels.
Luminance. Parameter that determines the brightness (but
not the color) of each spot (pixel) on a CRT screen in color or
B/W systems.
Glossary
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