IBM PC 300GL Types 6275, Информационное руководство

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perform complex mathematical operations in parallel
with other operations.
cycle . (1) An interval of space or time in which one
set of events or phenomena is completed. (2) A
complete vibration, electric oscillation, or alternation
of current.
D
daisy chain . A method of device interconnection
for determining interrupt priority by connecting the
interrupt sources.
data . (1) A re-interpretable representation of
information in a formalized manner suitable for
communication, interpretation, or processing.
(2) Any representations such as characters or analog
quantities to which meaning is or might be assigned.
data bus . A bus used to communicate data
internally and externally to and from a processing
unit, storage, and peripheral devices.
DDC . Display Data Channel
decibel (dB) . A unit that expresses the intensity of
a sound.
decimal . Pertaining to a system of numbers to the
base 10; decimal digits range from 0 through 9.
default . Pertaining to an attribute, condition, value,
or option that is assumed when none is explicitly
specified.
device . A mechanical, electrical, or electronic piece
of equipment designed to serve a special purpose or
perform a special function.
device driver . A file that contains the code needed
to use an attached device.
diagnostic . Pertaining to the detection and isolation
of errors in programs and faults in equipment.
diagnostic program . A computer program that is
designed to detect, locate, and describe faults in
equipment or errors in computer programs.
digital . (1) Pertaining to data in the form of digits.
(2) Contrast with analog.
DIMM . Dual inline memory module
direct memory access (DMA) . The transfer of data
between memory and input/output devices without
microprocessor intervention.
diskette
. A small magnetic disk permanently
enclosed in a rigid or semi-rigid protective jacket.
diskette drive . The mechanism used to seek, read,
and write data on diskettes. It can be installed in, or
attached to, a computer.
disk swapping . A form of memory management
whereby if additional memory is needed for the
active programs, the operating system transfers the
least-used information from memory to the hard
disk to make more memory available. When the
transferred information is needed, it is exchanged
with other information in memory.
Display Data Channel (DDC) . An industry
standard for passing monitor configuration
information between a monitor and the attached
personal computer. Plug and Play technology is
used to provide automatic performance optimization
for the monitor. A DDC-enabled computer can
interpret configuration information from a
DDC-enabled monitor and then set the display
mode that best uses the capabilities of the monitor.
Display Power Management Signaling (DPMS) . A
monitor feature that makes it possible for the
attached personal computer to safely lower and
manage the power consumption level of the
monitor, based on defined modes of inactivity of the
keyboard and mouse. The power level can be
progressively lowered each time the monitor is
placed into the next mode—from On, to Standby, to
Suspend, to Off. To take advantage of this feature,
the monitor must be used with a computer and
operating system that are hardware and software
enabled for DPMS. If the monitor is attached to a
video adapter, the adapter must also be DPMS
enabled.
DMA . Direct memory access.
DMI
. Desktop Management Interface
DPMS . Display Power Management Signaling
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