User`s guide
CHAPTER
2
USING
YOUR
PRINTER
A.
Introduction:
Now
that
you
have
learned
how
to
install
the
ribbon
cassette
and
paper
into
your
new
Printer,
how
to
connect
it
to
your
computer,
how
to
test
it
and
how
to
solve
any
problems
that
may
occur,
you
are
ready
for
the
next
step
—
Putting
the
MPS-803
Printer
to
work
with
you.
In
this
chapter,
you
will
see
how
to
use
your
Printer
to
print
program
listing,
program
results,
and
graphic
displays.
Before
we
go
any
further,
make
sure
that
you
aro
able
to
do
the
following:
1.
Operate
your
COMMODORE
computer.
2.
Write
elementary
programs
in
BASIC
language.
3.
OPEN
and
CLOSE
files.
4.
Read
and
write
files
to
various
peripheral
devices:
{Like
a
DATASSETTE™
recorder
or
COMMODORE
Floppy
Disk
Drive
for the
purpose
of
saving/
retrieving
programs
keyed
in
as
you
continue
through
the
rest
of
this
manual.)
If
you
are
not
familiar
with
any
of
the
above
items,
take
the
time
now
to
read
and
understand
USER'S
GUIDE
and
PROGRAMMER'S
REFERENCE
GUIDE.
B.
Basic
Commands
Associated
With
Your
Printer
1.
The
OPEN
Command:
This
command
creates
a
linkage
or
correspondence
between
a
given
physical
device
and
a
file
number.
Its
format
is
as
follows:
OPEN
Ifn.dn.sa
where:
Ifn
dn
Is
the
fogical
file
number
(any
number
from
1
to
255).
If
the
logical
file
number
is
greater
than
127,
any
printed
lines
will
be
double
spaced.
Is
the
device
number
of
the
peripheral
that
will
be
sending/receiving
the
file.
Foi
the
remainder
of
this
manual
you
will
be
using
=4,
the
address
oi
your
Printer.
(Since
that
is
the
number
assigned
to
it
at
the
factory.)
21
&
FOR
J~i
TO
S:PRINT#4-*NEXT
J
220
CLOSER.
RUN
O1234567S9QI2345673901234S6?390123456789
COriMODORE
R-R
I
NTER
6.
Repeat
Bit
Image
Printing
CHR<8}
CHRS(26);CHR$(n);CHRS{Bit
Image
Data)
This
codes sequence
specifies
the
repeated
printing
of
bit
image
data,
"n"
is
a
binary
number
(0
through
255}
which
specifies
the
desired
number
of
the
printed
repetition;
followed
by
one-byte
bit
fmage
data
to
be
printing
repeat
edly.
When
0
is
specified
for
"n",
it
is
read
as
256.
fn
order
to
repeat
more
than
256
times
the
operator
needs
to
use
this
code
twice.
EXAMPLE:
l&B
F?EM
REPETITION
OF
BIT
PflTTERN
116
OPEN
4,4
=REM
PRINT
FN
GRfiPHIC
MODE
120
B3*=CHR*<S)
:
SUB$=CHR$t26:>
=DE$-CHR*<
155
130
FOR1
l*t
TO
£
14S
REHO
N
15tf
PPJ
NT#4,
£'S£;
SUP*
;
CHP*
C
N
>
i
CHR$
'-.
24 3
'■'
:■
DES
i
etn
next
j
170
•
180
FOR
J-l
TO
B:FRINT#4iNEXT
J
190
CL0SE4
2S0
210
DRTR
34,57.
75-
S9..
123^
1SS
RUN
I.inrura
i
"1-
37