Laser 128 User manual

PERSONAL
COMPUTER

FIRST EDITION -1987
All
rights
reserved.
Reproduction
or
use,
without
express
permission,
of
editorial
or
pictorial
content,
in
any
manner,
is
prohibited.
No
patent
liability
is
assumed
with
respect
to
the
use
of
the
information
contained
herein
. While
every
precaution
has
been
taken
in
the
preparation
of
this
book,
the
publisher
assumes
no
responsibility
for
errors
or
omissions.
Neither
is
any
liability
assumed
for
damages
resulting
from
the
use
of
the
information
contained
herein.
©Copyright
1987
Video
Technology
Computers
Ltd.

The
following
is
applicable
to
U.S.A.
FCC
class
B
version
only
This
equipment
generates
and
uses
radio
frequency
energy
and
if
not
installed
and
used
properly,
that
is,
in
st
rict
accordance
with
the
manufacturer's
instructions,
may
cause
interference
to
radio
and
television
r
ece
pti
on.
It
has
been
type
tested
and
found
to
comply
with
the
limits
for
a
Class
B
computing
device
in
accordance
with
the
specifications
in
Subpart
J
of
Part
15
of
FCC
Rules,
with
the
specifications
to
provide
r
easo
nable
protection
against
such
interference
in
a
residential
installation.
However,
there
is
no
guara
ntee
th
at
interference
will
not
occur
in
a p
articular
installation
.
If
this
equipment
do
es
cause
interfer
e
nce
to
r
adio
or
tele
visio
n
re
cept
ion,
which
can
be
determined
by
turnin
g
the
equipment
off
and
on,
the
user
is
encouraged
to
tr
y to
correct
the
int
erference
by
one
or
more
of
th
e
following
measures:
Reorient
the
receiving
antenna
Relocate
the
co
mput
er
with
respect
to
the
rece
ive
r
Move
the
computer
away
from
the
receiver
Plug
the
computer
into
a
diff
ere
nt
outlet
so
that
computer
an
d
receiver
are
on
differ
e
nt
branch
c
ircuit
s.
If
necessary,
the
us
er
s
hould
con
s
ult
the
deal
er
or
an
experienced
radio/television
technician
for
ad
ditional
suggest
ions.
The
user
may
find
the
followin
g
booklet
prepared
by
the
Federal
Communic
a
tions
Commission
helpful:
"How to
Id
e
ntify
and
Resolve
Radio-TV
Interf
erence
Problems".
This
booklet
is
available
from
the
U.S.
Government
Printing
Off
ice
,
Washington
,
DC
20402,
Stock
No
. 004-
000-00345-4.
Use
peripheral
cables
s
upplied
by
Video
Technology.
These
cables
have
special
shielding
to
prohibit
RF
interf
ere
nce.
11

PRECAUTIONS
1.
POWER
UP
PRECAUTION
The
computer
hardw
a
re
will
not
lose m
emo
ry
immediately
after
th
e
power
is
turned
off.
So
the
user
s
hould
wait
for
a
very
shor
t mo
ment
to
turn
on
the
computer
after
the
unit
has
b
een
powered
down.
Other
wise
the
computer
will
not
cold-start
properly.
2.
WARNING
ON
EXPANSION
CONNECTOR
The
expansion
co
nn
ect
or
on
the
le
ft
side
of
yo
ur
computer
is
for
the
interface
cards
of
th
e
Apple
II
series
comp
uter
s.
Before
you
plug
or
unplu
g
the
interface
card,
please
**MA:((E
SURE
YOUR
COMPUTER
IS
POWERED
OFF**
.
The
maximum
current
th
at
can
be
drawn
f
rom
+5V
of
t
he
expansion
co
nn
ecto
r is 500MA.
Warrant~
·
of
th
e
computer
may
be
void
ed
if
thi
s
rule
is
not
fo
ll
owed
and
s
ub
se
quent
dam
age
to
the
computer
will be
the
sole
re
spons
ibility
of
the
owner
of
the
co
mpu
ter.
3.
STATIC
DISCHARGE
DANGER
Under
an
extreme
ly
dry
environment,
th
e
re
are
al
ways
chances
to
damage
the
co
mput
er
due
to
static
di
scharge.
It
is
highl
y des
ir
ab
le
that
before
you
plug
or
un
p
lug
any
peripheral
cards
to
the
50
way
card
edge
connector,
you
disch
arge
yourse
lf
by
touching
your
fing
ers
to
the
metal
plate
on
th
e
bottom
of
the
comp
uter
. You sho
ul
d
never
try
to
tou
ch
the
pins
of
the
connector
w
ith
yo
ur
fingers.
4.
WARNING
ON
VIDEO
CONNECTOR
The
v
ideo
connector
on
the
rear
panel
of
yo
ur
computer
is u
sed
for
co
nnectin
g yo
ur
compute
r to a
video
monitor
as
the
di
sp
lay
device
only,. You
sho
uld
ne
ver
connect
s
uch
connector
to
th
e
anten
na
in
pu
t
of
your
TV
set
directly.
Otherwise
,
th
e
warranty
of
the
computer
may
be
voided
if
this
rule
is
not
followed
a
nd
s
ub
se
quent
damage to
the
computer
and
/
or
your
TV
se
t
will
be
the
sole
responsibility
of
the
ow
n
er
of
the
computer.
If
you
Ill

want
to
use
your
TV
set
as
the
display
device,
you
should
connect
a
TV
interface
between
the
computer
and
the
TV
set.
5.
SETTING
OF
40/80
COLUMN
SWITCH
Some
software
needs
this
switch
to
be
set to
the
80
column
position
otherwise
the
program
may
break
out.
Before
running
your
softwa
re,
please
check
that
the
switch
is set to
the
required
position.
6.
SETTING
OF
ALT
/ST
D
SWITCH
There
is a
keyboard
layout
switch
on
the
back
panel
of
the
computer.
Setting
the
switch
to
the
STD
position
will
give
characters
displayed
as
shown
on
the
keytops.
Setting
the
switch
to
the
ALT
position
will
give
the
DVORAK
keyboard
layout.
E.g.
typing
the
key
with
"R"
on
it
will
give
a
"P"
character.
lV

TABLE
OF
CONTENTS
TABLE
OF
CONTENTS
EDITORIAL
.......
.....
..
...........
...................
..........
.
..........
.
..........
i
PRECAUTIONS
...
.............
....
.
..
.
........
...
...
.
.....
.
..
.....................
iii
PART
I
USER'S GUIDE
1. A
FIRST
LOOK
........
.
..
...................
.......
..
.....
.
..............
I-1
1.1
FEATURES
OF
THE
LASER
128/
128EX.........................
..
.
...
.............
....
...................
..
..
.I-2
1.2
THE
PURPOSE
OF
THIS
MANUAL
......
.I-5
2.
GETTING
FAMILIAR
WITH
THE
LASER
128/128EX
.............
..
...
..
...........................
.......
I-7
3.
GETTING
STARTED
.........
..
.
..
.......
.......................
..
.I-17
3.1
CONNECTING
THE
AC
ADAPTOR
.......
I-
18
3.2
CONNECTING
THE
VIDEO
MONITOR
/
TV
........
..
.....
..................................... I-19
3.3
ST
AR
TING
UP
THE
COMPUTER
SYSTEM
...
................
..
..
..
................
..
.
..
.....
...
.....
.
.......
I-
21
4.
THE
KEYBOARD .
...........
:
..
.
..............
..
..
..................... I-25
4.1
TYPEWRITER
KEYS
....
.
....
.
..
.
..
.
..
...
..
.
..
.
....
.....
...
I-
27
4.2
CURSOR-CONTROL
KEYS
.....
..
..........
........
I-30
4.3 COMMAND
KEYS
......................................
.....
..I-30
4.4
THE
"CTRL"
KEY
............................................. I-33
4.5
FUNCTION
KEYS
........
..................................... I-34
4.6
THE
NUMERIC
KEYPAD
.........
.....
..............
I-36
5.
THE
VIDEO
DISPLAY
...............................
............
I-37
5.1
SELECTING
A
SUITABLE
VIDEO
DISPLAY
DEVICE
.
..
.......
................
.............
..
.1-38
5.2
VIDEO
DISPLAY
MODES
.....
..................... I-40
5.2.1
TEXT
MODES
........
.
.....
.................... I-41
5.2.l.l
40-COLUMN
TEXT
...
..
.I-41
5.2.1.2
80-COLUMN
TEXT
......
I-42
v

TABLE
OF
CONTENTS
5.2.2
GRAPHICS
MODES
.....
................. I-43
5.2.2.1 LOW-
RESOLUT
I
ON
GRAPHICS
........................I-43
5.2.2.2
MEDIUM
-
RESOLUTION
GRAPHICS
........................I-44
5.2.2.3
HIGH
-
RESOLUTION
GRAPHICS
.....
..
..
.
..
.
..
......
.
..
I-44
5.2.2.4
DOUBLE-HIGH
-
RESOLUTION
GRAPHICS
...
.
.....
..
...
..
....
..
..I-45
5.2.3
MIXED
GRAPHICS
/
TEXT
DISPLAY
..................
..
..
....
..
................ I-46
6.
INPUT
/OUTPUT
PORTS
......
..
....
.......................... I-48
6.1
BUILT
-
IN
I/ 0 DEVICES
AND
INTERFACES
.....................................................1-49
6.
1.1
PORT
0- 40-COLUMN
DISPLAY
.......
....
.................................... I-50
6.1.2
PORT
1-
PARALLEL
/
SERIAL
PRINTER
....
...
.....
.
....
............................. I-52
6.1.2
.l
PARALLEL
PR
I
NTER
COMMANDS .....................I-53
6.1.2.2
SER
IAL
PRINTER
COMMANDS ............
..
....
..
.I-55
6.1.2.3
PRINTING
GRAPHICS
WITH
THE
COMPUTER
....................1-59
6.
1.3
PORT
2-
SERIAL
COMMUNICATION
..
.
......
....
..
..
......
..
I-60
6.1.4
PORT
3-
80-COLUMN
DISPLAY
..........................
..
..............
..I-64
6.
1
.5
PORT
4- MOUSE ................:........... 1-69
6.1.6
PORT
5-
EXPANSION
MEMORY
...
................................
........
I-70
6.1.7
PORT
6- 5.25"
DISK
DRIVE
....
I-
71
6.1.7.1
ADJUSTING
DRIVE
SPEED
.............
..
1-73
6.1.8
PORT
7- 3.5"
DISK
DRIVE
....
..
I-74
6.2
EXPANSION
CONNECTOR
....................... 1-74
Vl

TABLE
OF
CONTENTS
PART II
BASIC
MANUAL
1.
INTRODUCTION
..................................
..
.
..
.
..
.............
11-1
1.1
TO
START
BASIC ...........
....
........
..
.......
.
........
11-2
1.2 THIS
MANUAL
......................................
...
.
..
.
..
11-
2
1
.3
VARIABLES
..
..
.
....
..............
.........
..
..................
..
11-3
1.4
VARIABLE
NAMES
...........
.
.....
.
..............
.
.....
11-4
1.5
ARRAY
VARIABLES
..................................
11-5
1.6
EXPRESSIONS
AND
OPERATORS
.....
II-6
1.6.1
ARITHMETICAL
OPERATORS
.....
.......................
....
.....
11-6
1.6.2
LOGICAL
OPERA
TORS
.
.......
.
....
II
-7
1.6.3
RELATIONAL
OPERA
TORS
.
..
11-8
1.6.4
FUNCTIONAL
OPERATORS
..
11-9
1.7
STRING
OPERATIONS
............................
..
II-9
2. SOME
BACKGROUND
IN
BASIC
PROGRAMMING
...................................................
.....
11-12
2.1
LINE
FORMAT
..........
.....................................II-
12
2.2
CONSTANTS
...................
....
..
..
..............
............
II-13
2.3
USING
A
PRINTER
WITH
THE
COMPUTER
.................
.
...............
..................... 11-14
2.4
SERIAL
PRINTER
..
.
.........
..
.
..
.
..
...
.
.......
..
.......
11-14
2.5
PARALLEL
PRINTER
..........
.
......
.
.......
..
.....
11-16
3.
BASIC
COMMANDS AND
STATEMENTS
.
...
11-18
3.1
AMPERSAND
COMMAND(&)
.........
.......
.11-19
3.2
CALL
...
.....................
..
.
..
............
..
.....................
....
.11-20
3.3
CHR$
.........
..................
..
.
.......
..
............................
..
11
-21
3.4
CLR
..............................
..
....
.
.......
..
..........................
11
-22
3.5
COLOR
....................................................
..
..
.........
11-23
3.6
CONT
.......................
..
...............
.
...
..
.....
.................
11-25
3.7
DATA
.......
.
..
...
........................
..
.....
..
.......
..
.....
..
......
11-26
3.8
DEF
FN
...................
...........
..
...............................11-27
3.9
DEL
............
..
.
..
..
.....................................................
11-28
3.10
DIM
.................................
..
......
..............
....
..
...........
11-29
vii

TABLE
OF
CONTENTS
3.11
DRAW ..............................
....
.................................II-31
3
.1
1.1
DRAWING
SHAPES .......................
11-31
3.11.2
SETTING
UP
THE
SHAPES
.....
11-31
3.11.3
THE
SHAPE
TABLE
.....
..
..............
11-32
3.11.4
BEFORE
USING
DRAW,
XDRAW,
ROT
AND
SCALE
.....
11-34
3.11.5
ENTERING
A
SHAPE
TABLE
.........
..
..
...........
..
.
..
.
...........
....
.....
II-35
3.12
END
.......
..........
........
.....................................
......
...
II
-
37
3.13
FLASH
..........
..
...................................
...
.
..
......
.......
II-39
3.14
FOR
...
NEXT
..........
..
...
.
....
.....
.............
..
..
.............
11
-40
3.15
GET
........................................................................
11-
·43
3.16 GOSUB
...
RETURN
.......................
.....
.....
.
..
.
..
:.11-44
3.17
GOTO
.........................
..............
...
...
..................
...
..
II-46
3.18
GR
......................................
..
.............
..
...
..
........
.
.....
II
-48
3.
19
HCOLOR
........
.....................................................11-49
3.20
HGR
HGR2
......................................................11-50
3.21 HIMEM: ..............
....
.........................
...........
.....
.
..
..
11-51
3.22
HLIN
...............
.......
......
....
.....................................
11-52
3.23 HOME
....
......
........
.
.......
........
.................................
11
-53
3.24
HPLOT
.
.......
.................
...
.......
.............
.........
........11-54
3.25
HT
AB ............................................................
..
.
.....
11-55
3.26
IF
...
GOTO
AND
IF
...
THEN
....................
....
11-56
3.27
IN#
...
.....
..
...........
..
.....
...
....
.......
..
.
..
........
.............
.....
11
-58
3.28
INPUT
................
..
.......
.
...........
...
.....
.
..............
.
....
.II-59
3.29
INVERSE
............................................................II-60
3.30
LEFT$
........................................
..
....
..
.
..
.
..
....
.
........
II-61
3.31
LET
.............................................
........
............
...
....
II-62
3.32 LIST
..
.
..
.
..
.
.......
.
......
.
.........
.
..
..............
...........
..........
11-63
3.33 LOMEM: ..............................
.....
.
..........
..
.....
.
..
.....
..11-64
3.34 MID$ ...........................
...
....
.
..
...
..
.
...........
................
11-65
3.35 NEW .....................
.......
...............
..
....
.....
.......
..
.
..
.
....
11-66
3.36
NORMAL
.....
..
...
.
..........
.
..
.
..
.
.....
...........................
11-67
3.37
NOTRACE
....
..............
.....
..
..
....
........
..........
.........
11-68
3.38
ONERR
GOTO
..........
.....
....
.................
....
.....
....
11-69
3.39
ON
...
GOSUB
AND
ON
..
.
GOTO
.........
..
....
..
11·71
3.40
PDL
...............................
..........
.........
..............
..
....
..
11-73
3.41
PEEK
.
...
..
..
.....................
..
........................
.......
..
.
....
11-74
3.42
PLOT
....................
..
.
..
............................................
11-75
3.43
POKE
................
....
.
.........
.
..
.................
........
....
.
.....
11-76
3.44
POP
.
..
..
....
...
....
..........
......
.
..
.
..
.
...
..............................
11-77
3.45
PR#
....
..
.........
..
...................
....
..
..............
....
............11·78
viii

TABLE
OF
CONTENTS
3.46
PRINT
..
.
......
....
...
......
..
......
....
..
......
.
......
..
...............11-80
3.47
READ
......................
....
..........................................11-82
3.48
REM
.......
.
......
....
..
.
....
..
..........................................
..
11
-83
3.49
RESTORE
...
.....
............................
..
...............
..
....
11-84
3.50
RESUME
.........
.......
..............................
....
..
......
....
11-85
3.51
RIGHT$
............................................
..
.................11-86
3.52
ROT
..........
...
.......................................................
..
.
11-87
3.53
RUN
..
....
..
.............
..
....................................
....
.......11-88
3.54
SCALE
..................................................
..
..............11-89
3.55
SCRN
....
.......................
...
.......................................11-90
3.56
SPC
........................................................
..
...............II-91
3.57
SPEED
...................................................................11-92
3.58
STOP
......................................................................11-93
3.59
STR$
..
....
.
..
......
....
.............................
........
..
....
.....
..
.11-94
3.60
TAB
...........................
...
..............................
..
.
..
.......
11
-95
3.61
TEXT
............
..
......................................................11-96
3.62
TRACE
..................
..
............
..
........
....
....
...
............
11
-97
3.63
USR
........................................................................
11
-98
3.64
VLIN
....
..
..................
...
...
......
...
....
..
..
.
..
...................
11
-99
3.65
VTAB
....
..............................................................
..
11-100
3.66 WAIT ........................
..
........
....
..........................
..
...
11
-
101
3.67
XDRA
W ..............
....
................
....
..
..
.................
....
11-103
4.
BASIC
FUNCTIONS
....
..
.....
.......
..
........
.....
.........
.......
11-105
4.1
ABS
...
......
..................
....
.......
...................................
11-
106
4.2 ASC ........................................................................
11
-107
4.3
ATN
............
............
........................
....
..
.
.....
..
.
..
......
11-108
4.4 cos
......
..
................................................................
11-109
4.5
EXP
......................
......
..
........
..
......
.
..
....
..
............
.
....
11-1
10
4.6
FRE
...
........
..
....
...
..
....
..............................................11-111
4.7
INT
..
................
..
........
......
................
......
.................11-112
4.8
LEN
..................
..
.....................
..
...........
..
................11-113
4.9
LOG
..
....
....................
.....
........................................
11-1
14
4.10 POS
..
............
..
...
..
.
....
........................
..
.....................11-115
4.
11
RND
.................
..
..
..
...........
......
....
..
..
....
.............
....
..
11-1
16
4.12
SGN
..
...................................
....
..
.
...
.................
......
..
11-117
4.
13
SIN
..
..
..
........
..
.
.......
..............................
..
..................11-118
4.
14
SQR
..............................
..
..
.........
..
..
.
..
......................11-119
4.15
TAN
......
....
.
....
....
.................................
..
.................11-120
4.1
6
VAL
............................
...
..
..........
..
..
............
....
.......
.11-121
IX

TABLE
OF CONTENTS
APPENDIX
A.
SPEEDING
UP
PROGRAM
EXECUTION
IN
THE
LASER
128EX .
..
..
..
.
...
..
..
......................
..
....
A-1
B.
INSTALLATION
OF
EXPANSION
RAM
......
A-3
C.
EXPANSION
CONNECTORS
DIAGRAMS
...
A-9
D.
ERROR
MESSAGES
................................................. A-
14
E.
KEYS
AND
THE
ASSOCIATED
CODES
..
.
..
..A-20
F.
DISPLAY
CHARACTERS
.
..
.......................
..
.
..
.
..
.
...
A-23
G.
ASCII
CHARACTER
CODES
...............................A-25
H.
MA
THE
MA
TI
CAL
FUNCTIONS
....................... A-28
I.
SUMMARY
OF
BASIC
COMMANDS ...............A-
31
J.
LIST
OF
RESERVED
WORDS
IN
BASIC
.....
A-39
x


PART
I
USER'S
GUIDE

CHAPTER
1
A FIRST LOOK
1- 1

A
FIRST
LOOK
1. A
FIRST
LOOK
Congratulations
on
your
purchase!
You
are
now
the
proud
owner
of
a
powerful
and
easy-to-use
computer
w
hich
is
suitable
for
app
lications
ranging
from
arcade
games,
personal
computing
and
educational
aid
up
to
s
cientific
and
business
data
processing.
Figure
1-1
The
LASER
128/
128EX
1.1
Features
of
the
LASER
128/128EX
Your
computer
is
designed
for
tomorrow
as
well
as
for
today.
First
of
all,
the
computer
has
built
-
in
interfaces
for
most
of
the
common
peripherals
so
that
you
don't
have
to
purchase
expensive
interface
cards
for
devices
such
as
disk
drives
or
printers.
Secondly,
it
can
easily
be
expa
nded
to
accommodate
more
memory
as
well
as
Input
/
Output
devices
so
that
the
computer
system
can
be
configur
ed
to
suit
all
kinds
of
applications
that
yo
u
may
ever
think
of.
1-2

A
FIRST
LOOK
Most
important
of
all,
the
computer
can
run
almost
all
of
the
software
w
ritt
en
for
the
Apple
®
IIe
computer
so
that
as
soon
as
you
set
up
th
e co
mputer
system, you h
ave
access
to
one
of
the
world's
largest
so
ftware
library
in
stant
l
y!
The
computer
comes
in
two
vers
ions:
The
"LASER
128" &
the
"LASER
128EX".
The
LASER
128EX
carries
more
features
over
the
LASER
128
which
make
it
even
more
po
we
rful.
The
following
is a
brief
sum
mar
y
of
some
of
the
featur
es
of
both
vers
ions
of
the
computer:
•
The
65C02
CPU
(Ce
nt
ral
Processing
Unit)
u
sed
is
an
en
h
anced
version
of
the
6502
CPU
having
a
larger
instruction
set
and
more
addressing
modes.
•
In
the
LA
SER
128,
the
CPU
run
s
at
I
MHz.
In
the
LASER
l
28EX,
the
CPU
clock
is
sof
tware
-
selccta
ble
to be I
MHz,
2.3
MHz
or
3.6
MHz
so
that
program
execution
ca
n
be
speeded
·
up
at
will
while
compatibility
with
the
"standa
rd"
computer
can
still
be
maintained.
(SEE
APPENDIX
A.)
•
Built-in
32 K-
byte
ROM
contains
the
Microsoft
®BASIC
interpreter
a
nd
software
drivers
for
th
e
various
built-in
Input
/
Output
de
vi
ce
s
and
interfaces.
•
Built-in
128
K-byte
system
RAM.
In
the
LASER
128EX,
additional
64K
-by
te
video
RAM
is
bui
lt-in.
1-3

*
Sec
p.1
-26.
A
FIRST
LOOK
•
Up
to 1 M-
byte
expansion
RAM
can
be
added
to
the
LASER
128
by
plu
gging
in
an
optional
Memo
ry
Expansion
Card.
Jn
th
e
LASER
l
28EX,
thi
s
ca
rd
has
a l
ready
been
in
c
luded
and
all
yo
u n
eed
is to
in
sta
ll
supp
l
eme
nt
ary
RAM
chips
(sec
APPEND
IX B.)
•
The
keyboard
contains
90
step
-
sc
ul
pt
ur
ed
keys
inc
ludin
g
function
keys,
cursor-
contro
l
keys,
screen-editing
ke
ys
and
a
sepa
rate
numeric
keypad.
•
The
keyboard
l
ayout
is sw
it
c
h-
se
l
ectab
le
to
be
"QWERTY"
or
"DVORAK"*.
•
Built-in
speake
r
with
vo
lume
control
f
or
sound
generation.
•
An
ea
rphone
jack
is
provid
ed
for
connecting
an
ea
rph
one
or
other
audio
outp
ut
devices.
•
Bot
h
40-column
and
80-
co
lum
n t
ex
t
displays
are
su
pported.
•
Four
graph
ics m
odes
are
avai
l
able
in
c
lu
ding:
-
Low-resolution
graph
ics
(40H
x
48V,
16
co
l
ors)
-
Medium
-
re
so
luti
on
grap
hi
cs
(80H
x
48V,
16
colors)
-
High-reso
lut
ion
graphics
(280H
x 1
92V,
6
co
lor
s)
Double-
hi
gh
-r
eso
lu
ti
on
grap
h
ics
(560H
x 1
92V,
16colors)
I-4

A
FIRST
LOOK
•
Supports
mixed
graphics
/
text
display
for
any
of
the
four
graphics
modes.
•
NTSC
or
PAL
standard
composite
video
output
for
color/monochrome
video
monitor
or
TV
via
a
RF
modulator.
•
Supports
versatile
video
display
devices
such
as
LCD
panel
and
RGB
monitor
.
•
Built-in
5.25"
disk
drive
.
•
Supports
an
external
5.25"
or
3.5"
disk
drive.
•
Supports
Centronics-type
parallel
printers
.
•
Supports
serial
printers
via
built-in
RS232C
interface.
•
Supports
modems
or
other
serial
communicatio
n
devices
via
built-in
RS232C
interface
.
•
Supports
input
devices
such
as
joysticks,
paddles
and
mouse.
•
An
expansion
connector
is
availab
le
for
plugging
in
one
(or
two
with
an
optional
expansion
box)
peripheral
interface
cards.
1.2
The
purpose
of
this
manual
This
manual
is
not
intended
to
be
a
textbook
of
computer
architecture
or
computer
programming.
There
are
already
a
lot
of
well-written
books
on
those
subjects
.
Instead,
it
is a
user's
guide
geared
to
the
first-time
computer
users
.
The
materials
which
you
will
find
in
this
manual
include
:
1-5

A
FIRST
LOOK
•
Functional
descripti
on
of
each
part
of
the
LASER
128/
128Ex
.
•
Installation
of
the
computer
system
•
Basic
operations
of
the
LASER
128/
128EX.
As
an
ordinary
user,
you
do
not
need
to
know
anything
about
the
internal
workings
of
the
computer
(although
th
at
might
be
an
advantage)
before
you
can
u
se
it.
Using
the
computer
can
be
as
si
mple
as
inserting
an
application
program
diskette
into
the
built-in
disk
drive
and
turning
it
on.
The
rest
of
the
work
is
done
by
the
application
program
and
is
therefore
transparent
to
the
user.
However,
if
you
are
a
programmer,
you
may
also
want
to
know
the
hard
ware
and
firmware
details
of
the
LASER
128/
128EX
in
order
to
utilize
its
features
efficiently.
Those
information
can
be
found
in
the
Technical Reference Manual
available
separately.
1-6

CHAPTER
2
GETTING FAMILIAR WITH THE
LASER
128/128EX
1-7
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