Laser 128 - Page 219

INSTALLATION OF EXPANSION RAM
Insert the dynamic RAM chips into the IC sockets
on the memory expansion card carefully, paying
particular attention to the orientation of the RAM
chips. THE RAM CHIPS WILL BE DAMAGED IF
INSERTED IN THE WRONG DIRECTION (see
Figure B-4).
p 0256
I
CO MPONENT SIDE OP PCB
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BANK 4 DANK3 BA NK2 D ANK t
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CO NN ECTOR
Figure B-4
Inserting the dynamic RAM chips
The IC sockets on the memory expansion card are
ar ranged in four rows. Each row contains eight IC
sockets . Expansion RAM chips must be added in
groups of eight, with each group occupying one of
the four rows of IC sockets. The RAM chips must
be inserted in bank sequence according to the bank
number indicated in the Figure B-4. Inserting RAM
chips in one row gives you an additional 256 K-
byte expansion RAM so that up to 1 M-byte
expa n sion RAM can be installed.
Cover the motherboard a nd RAM board with the
top metal-shield plate and fix it on the bottom
cabinet by tightening all the screws.
Put the keyboard back to it s o ri gina l positions.
A-7