Appendix H - Glossary
164
S-Video
Type of video signal used in S-VHS and some laser disc
formats. It transmits luminance and color portions separately,
using multiple wires. S-Video avoids composite video
encoding, such as NTSC, and the resulting loss of picture
quality. Also known as Y-C Video.
System Board
The large printed-circuit board in a computer on which most
electronic devices are mounted; the primary board in a
computer. All other interfaces receive control signals or
information from the system board. Also commonly referred
to as the “mainboard” or “motherboard.”
Thin Film Transistor (TFT)
A type of LCD flat-panel display screen, in which each pixel is
controlled by from one to four transistors. TFT screens are
sometimes called active-matrix LCDs. This technology
provides bright, high-contrast images viewable from wide
angles. It likewise delivers a high refresh rate, enabling the
playback of motion video and animation, as well as easy
navigation with a mouse pointer.
Touchpad
A pointing device to move your cursor under certain software,
like Windows 95.
UART
Universal Asynchronous Receiver/Transmitter, the UART is
compatible to NS16550.
USB
Universal Serial Bus. A new external bus standard that
supports data transfer rates of 12Mbps (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.
Video Graphics Array (VGA)
A standard for 640x480 resolution, also see SVGA and XGA.
Wait State
A delay in the computer’s information processing cycle
caused by a difference in speed between a faster processor
and slower memory. A 0-wait state means the processor
does not have to “wait” for memory, and can access data as
fast as needed.
XGA
1024x768 pixels resolution, also see VGA and SVGA.
ZV (Port)
Zoomed Video Port. A port that enables data to be
transferred directly from a PC Card to a VGA controller. The
port is actually a connection to a zoomed video bus. This new
bus was designed by the PCMCIA to enable notebook
computers to connect to real-time multimedia devices such
as video cameras. The first notebook computers with the ZD
port arrived in late 1996.
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Page 170: ...Index 170 Z Zoomed Video 29 ZV 29 Zoomed Video Port 158 ZV Port 164 ZV Port 158 ...