NEC POWERMATE 2000, Service And Reference Manual

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Glossary 15
sound card
An expansion card designed for sound input and output. Sound cards can record
and play back digital audio. Most also have a MIDI synthesizer, which means they
can play MIDI files; some also have MIDI inputs and outputs.
super video graphics array (SVGA)
A color bit-mapped graphics display standard that provides a resolution of 1024x
768 with up to 256 colors displayed simultaneously.
synchronous
Refers to protocols that require the clocks of the communicating machines to be
coordinated.
system board
The main printed circuit board inside the system unit into which other boards and
major chip components, such as the system microprocessor, are connected.
T
tpi
Tracks per inch.
track
Any of many concentric circular regions on a disk for storing data. Tracks are
divided into sectors. One measure of storage density of a disk is tpi.
U
Ultra DMA
A protocol developed by Quantum Corporation and Intel that supports burst mode
data transfer rates of 33.3 MBps. This is twice as fast as the previous disk drive
standard for PCs, and is necessary to take advantage of new, faster Ultra ATA disk
drives. The official name for the protocol is Ultra DMA/33.
USB
Universal Serial Bus. An external bus standard that supports data transfer rates of
12 Mbps (12 million bits per second). A single USB port can be used to connect up
to 127 peripheral devices, such as mice, modems, and keyboards. USB also
supports Plug-and-Play installation and hot plugging. It is expected to eventually
replace serial and parallel ports.
V
VESA
Video Electronics Standards Association. The source of a SuperVGA standard used
on many video boards.