Fujitsu 420D User Manual page 143

s tored on a series cyl i n d rical dru m s . The head
de s i gn a tes the re ading devi ce , similar to the head
on a casset te recorder on ly mounted on a mov-
a ble arm . An o t h er ad d ressing met h od is LBA .
CMOS RAM
Com p l em en t a ry metal ox i de sem i con du ctor
ra n dom access mem ory. This is a tech n o l ogy for
m a nu f actu ring ra n dom access mem ory wh i ch
requ i res very low levels of power to opera te .
COM Port
Abbreviation for communication port. This
is the serial interface connection to other
equipment.
Command
An instruction which you give the operating
system. Example: run a particular application
or format a floppy disk.
Configuration
The combination of hardware and software
that makes up the system and how it is
allocated for use.
A p p e n d i c e s
CRT
Cathode Ray Tube.A display device which uses
a beam of electronic particles striking a lumi-
nescent screen. It produces a visual image by
varying the position and intensity of the beam.
Data
The information a system stores and processes.
DC
Direct current.A voltage or current that does
not fluctuate periodically with time.
Default Value
A preprogrammed value to be used if you fail to
set your own.
DIMM
Dual-in-line memory module.
Disk
A spinning platter of magnetic data storage
media. If the platter is very stiV it is a hard disk,
if it is highly flexible it is a floppy disk,if it is a
floppy disk in a hard housing with a shutter it is
commonly called a diskette.
L i f e B o o k 4 0 0 S e r i e s f r o m F u j i t s u
Disk Drive
The hardware which spins the disk and has the
heads and control circuitry for reading and
writing the data on the disk.
Diskette
A floppy disk in a hard housing with a shutter.
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 applica-
tion and operating system commands to exter-
nal 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.
125