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Laser 128 User Manual

Laser 128
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INSTALLATION
OF
EXPANSION RAM
B. INSTALLATION OF EXPANSION
RAM
Besides
the
128
K-byte
system
RAM
that
comes
with
your
computer,
it
a·lso
has
room
for
accommodating
up
to 1
M-byte
expansion
RAM
To
install
additional
RAM
in
the
computer,
you
need
the
following
items:
•
Optional
memory
expansion
card
(included
in
the
LASER
128EX).
•
256K
x 1
bit
dynamic
RAM
chips
type
(41256).
The
row
address
access
time
for
the
RAM
chips
should
be
120 ns
for
the
LASER
l
28EX
and
150 ns
for
the
LASER
128.
The
quantity
required
depends
on
the
size
of
the
expansion
RAM
and
is
shown
as
follows:
Expansion
RAM
size
256 K
512 K
786 K
1024 K
Quantity
of
41256
8 pcs.
16 pcs.
24 pcs.
32 pcs.
If
at
all
possible,
you
should
consult
your
dealer
for
installation
of
expansion
RAM.
However,
if
you
have
to
do
it
yourself,
do
it
with
care!
INCORRECT
INSTALLATION
MAY
CAUSE
PERMANENT
DAMAGE
TO
YOUR
RAM
CHIPS
AND
/
OR
THE
COMPUTER!
A-4

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Laser 128 Specifications

General IconGeneral
ProcessorMOS Technology 6502
RAM128 KB
ROM32 KB
CompatibilityApple II
Graphics280×192
SoundBuilt-in speaker
PortsComposite video
Operating SystemApple DOS 3.3, ProDOS
Storage5.25" floppy disk drive (optional second drive)