VTech Write It Right Computer Dokumentacja Pobierz pdf (Strona 59)

Installing Expanded

Memory

As mentioned before, MS-DOS only recognizes up to

640K

memory. Any memory above and beyond

640K

referred to

expanded memory.

Some applications like Lotus

1-2-3

and Dbase III make use of

up to 8 megaqytes (8

MB,

or 8,192K)

expanded memory.

On your computer system board, there is room for you to add

one megabyte (1 MB) of expanded memory.

You must add expanded memory in increments

512K,

you

can add

512K

or 1 ME.

always,

before you install anything, MAKE SURE .

THE

COMPUTER

UNPLUGGED FROM

THE

WALL OUTLET!

Purchase the correct memory chips. For every

512K

expanded memory you install:

Ask your dealer for sixteen

(16)

41256

RAM chips (256K

RAM x

1).

you

plan on using RAM parity, you'll need

eighteen instead of sixteen.

Th~

chips must be

150

nanoseconds (150ns) or faster.

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

In the diagram below, notice there are

two

banks of

em.pty

sockets for installing expanded memory. The banks are

labeled, Bank

Bank

'~nnniW

DOD

OmJ

0000000000000000

111111111

OOOOOOO~~

BankO

.~~~~~~Ba~

nnl~lh.

Bankl

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 94 95

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VTech Write It Right Computer Dokumentacja Strona 59

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