Fujitsu N6420 manual Driver, Extended Memory, Floppy Disk, Hard drive, Hexadecimal, Port, Ieee

L i f e B o o k N 6 4 0 0 S e r i e s U s e r ’ s G u i d e

DMA

Direct Memory Access. Special circuitry for memory to memory transfers of data which do not require CPU action.

DOS

Disk Operating System (MS-DOS is a Microsoft Disk Operating System).

Driver

A computer program which converts application and operating system commands to external devices into the exact form required by a specific brand and model of device in order to produce the desired results from that particular equipment.

DVD

Digital Video Disc. This is a form of optical disc storage for video, audio and computer data, envisioned to replace current digital storage formats (CD-ROM, laser and audio CD) because of its capability for storing greater amounts of data. A typical single layer, single- sided DVD, for example, can contain 4.7GB of data and a maximum of 17GB for the double-sided discs.

ECP

Extended Capability Port. A set of standards for high speed data communication and interconnection between electronic devices.

ESD

Electrostatic Discharge. The sudden discharge of elec- tricity from a static charge which has built-up slowly. Example: the shock you get from a doorknob on a dry day or the sparks you get from brushing hair on a dry day.

Extended Memory

All memory more than the 640KB recognized by MS-DOS as system memory.

FCC

Federal Communication Commission.

Floppy Disk

A spinning platter of magnetic data storage media which is highly flexible.

GB

Gigabyte.

Hard drive

A spinning platter of magnetic data storage media where the platter is very stiff.

Hexadecimal

A decimal notation for the value of a 4 bit binary number. (0-9, A, B, C, D, E, F) Example: 2F in hexa- decimal = 00101111 in binary = 47 in decimal.

I/O

Input/Output. Data entering and leaving your LifeBook notebook in electronic form.

I/O Port

The connector and associated control circuits for data entering and leaving your LifeBook notebook in elec- tronic form.

IDE

Intelligent Drive Electronics. A type of control interface for a hard drive which is inside the hard drive unit.

IEEE 1394

A type of data transfer protocol that allows for fast transfer of digital files and data with devices such as digital cameras.

IRQ

Interrupt Request. An acronym for the hardware signal to the CPU that an external event has occurred which needs to be processed.

KB

Kilobyte.

LAN

Local Area Network. An interconnection of computers and peripherals within a single limited geographic location which can pass programs and data amongst themselves.

LCD

Liquid Crystal Display. A type of display which makes images by controlling the orientation of crystals in a crystalline liquid.

Lithium ion Battery

A type of rechargeable battery which has a high power- time life for its size and is not subject to the memory effect as Nickel Cadmium batteries.

MB

Megabyte.

Megahertz

1,000,000 cycles per second.

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