Motorola MVME2600 Series Reference Manual page 275

Glossary
Universe
UV
UVGA
Vertical Blanking Interval (VBI)
VESA (bus)
VGA
virtual address
G
L
O
S
VL bus
S
VMEchip2
A
VME2PCI
R
Y
volatile memory
VRAM
GL-12
ASIC developed by Tundra in consultation with Motorola, that
provides the complete interface between the PCI bus and the 64-
bit VMEbus.
UltraViolet
Ultra Video Graphics Array. An improved VGA monitor standard
that provides at least 256 simultaneous colors and a screen
resolution of 1024 x 768 pixels.
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.