Motorola MVME2400 Series Installation And Use Manual page 168

Vertical Blanking Interval (VBI)
VESA (bus)
VGA
virtual address
VL bus
VMEchip2
VME2PCI
G
volatile memory
L
O
VRAM
S
S
A
R
Y
Windows NT™
XGA
Y Signal
GL-12
The time it takes the beam to fly back to the top of the screen in order
to retrace the opposite field (odd or even). VBI is in the order of 20
TV lines. Teletext information is transmitted over 4 of these lines
(lines 14-17).
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).
MCG second generation VMEbus interface ASIC (Motorola)
MCG ASIC that interfaces between the PCI bus and the VMEchip2
device.
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
(currently known as Windows 2000
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. This determines the brightness of each spot (pixel) on a
CRT screen either color or B/W systems, but not the color.
™).
Computer Group Literature Center Web Site
Glossary