VTech Write It Right Computer Dokumentacja Pobierz pdf (Strona 52)

Installing Parity

RAM

RAM parity is a method the computer can use to continually

monitor and test the performance and reliability

the memory

chips.

The advantage

parity RAM is the error-checking it performs.

Parity RAM spots potential failure in the RAM chips, and

informs the user. Without parity RAM, your system may "lock

up"

a failure occurs, providing no indication of the cause

the failure.

The disadvantage of parity RAM

its cost. We feel the price

of parity RAM far outweighs the benefits it produces, so we

recommend you don't make the extra investment for parity

RAM.

In case you really want to install it, here are the steps.

always, before you install anything, MAKE

SURE

THE

COM-

PUTER

UNPLUGGED FROM

THE

WALL OUTLET!

1. Purchase the proper chips .

• Ask your dealer for two (2)

4164

RAM chips (64K RAM

x 1), and two (2)

41256

RAM chips (256K RAM

xl)

• The chips must

150

nanoseconds (150ns) or faster.

Install the chips in the right sockets on the system board.

shown

in the

= ===

Irci~~

=======

diagram , the two

c=:J=

=c:::J~~§l~

===

====

4164

chips go in

====

I ====

sockets U35 and U50,

•

====

=-==

urn

while

chips go

the

two

sockets

41256

~-~E:i

c::J0

==c::J=

U25 and U41.

===

C=::J

=c::J=

c::::::::J

Y c::::J

===

_0="

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 94 95

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