Dell Precision 620 Manuel d'utilisateur télécharger pdf (Page 51)

byte

Eight contiguous bits of information; the basic data unit used by your computer.

Celsius

C-RIMM

continuity Rambus inline memory module. Rambus continuity modules are used to populate empty RIMM slots in some systems.

cache

To facilitate quicker data retrieval, a storage area for keeping a copy of data or instructions. For example, your computer's BIOS may cache ROM

code in faster RAM. Or a disk-cache utility may reserve RAM in which to store frequently accessed information from your computer's disk drives;

when a program makes a request to a disk drive for data that is in the cache, the disk-cache utility can retrieve the data from RAM faster than from

the disk drive.

card-edge connector

On the bottom of an expansion card, the metal-contact section that plugs into an expansion-card connector.

CD-ROM

compact disc read-only memory. CD-ROM drives use optical technology to read data from compact discs. Compact discs are read-only storage

devices; you cannot write new data to a compact disc with standard CD-ROM drives.

centimeter(s)

CMOS

complementary metal-oxide semiconductor. In computers, CMOS memory chips are often used for NVRAM storage.

COMn

The device names for the first through fourth serial ports on your computer are COM1, COM2, COM3, and COM4. The default interrupt for COM1

and COM3 is IRQ4, and the default interrupt for COM2 and COM4 is IRQ3. Therefore, you must be careful when you configure software that runs a

serial device so that you do not create an interrupt conflict.

component

As they relate to DMI, manageable components are operating systems, computer systems, expansion cards, or peripheral devices that are

compatible with DMI. Each component is made up of groups and attributes that are defined as relevant to that component.

config.sys file

The config.sys file (Windows 98 and MS-DOS only) is executed when you boot your computer (before running any commands in the

autoexec.bat file). This start-up file contains commands that specify which devices to install and which drivers to use. This file also contains

commands that determine how the operating system uses memory and controls files.

controller

A chip that controls the transfer of data between the microprocessor and memory or between the microprocessor and a peripheral device such as

a disk drive or the keyboard.

control panel

The part of the computer that contains indicators and controls, such as the power switch, hard-disk drive access indicator, and power indicator.

conventional memory

The first 640 KB of RAM. Conventional memory is found in all computers. Unless they are specially designed, MS-DOS programs are limited to

running in conventional memory.

coprocessor

A chip that relieves the computer's microprocessor of specific processing tasks. A math coprocessor, for example, handles numeric processing. A

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Dell Precision 620 Manuel d'utilisateur Page 51