VTech Write It Right Computer Dokumentacja Pobierz pdf (Strona 85)

Style Keyboard

IBM has manufactured a

few

different models of personal

computers (PC, PC

JR., PC/XT, PC/AT). The

PC/AT

style keyboard

generally considered to be superior. The

style keyboard

designed to feel like an IBM Selec-

tric typewriter and has large

SHIFf

and

RETURN

keys.

often said that the AT style keyboard feels more com-

fortable and

easier to work on because of its features.

BIOS

BIOS stands for Basic Input/Output System. The BIOS

the central computer program which organizes your entire

computer. The BIOS acts much like a computer "road

map". The BIOS contains a list of computer locations for

everything inside of your computer from computer chips to

floppy disk drives. When the microprocessor needs to send

a signal, it asks the BIOS how to get there.

As an example - you

iI1struct

your computer to read infor-

mation from disk drive "B". The microprocessor receives

your command.

then asks the BIOS where disk drive

"B"

located.

this point, the BIOS

will

give

the

microprocessor specific directions from the location of the

microprocessor chip to the location of the disk drive. The

microprocessor

will

then send an electrical impulse along

the route the BIOS has described, and this signal

will

in-

struct the disk drive to begin reading information. Without

the BIOS, your'microprocessor would be "all dressed up,

with no place to go" .

Boot Up

This

a slang term used to describe the computer's start-

up procedure. You boot up your computer when you turn

power to your computer "on".

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