Commodore MPP-1361 User Manual page 25

FORMAT CONTROL
Through
the
printer's
format
control option,
you can
control the interpretation of data sent
to
the
printer.
The
format
control option
allows
you
to
print
numbers
in
columns,
set the
number
of lines
per page, and perform other
useful formatting tasks.
To implement
the format
control
option,
you use
the
third
parameter
of the
OPEN
command.
OPEN
Ifn,
dn,
sa
As
before,
Ifn
is
the logical
file
number,
dn
is
the device
number
(also
known
as
the
primary
address),
and sa
is
the secondary
address.
It
is in
the secondary address
position that
you
enter the format
control
parameter.
You
can
enter
any
of
the 19
secondary addresses
in
your
OPEN
command. These
are:
Print
data exactly
as received
1
Print
data according
to
a
previously-defined format
2 Store the
formatting data
3 Set
the
number
of lines
per page
to
be
printed
4
Enable
the
printer
format diagnostic
messages
5
Define a
programmable
character
6 Set spacing between
lines
7 Upper/Lower case
8
ASCII/Graphics
9 Suppress
Diagnostic
Message
Printing
10 Reset
Printer
11
Set
Uni-Direction
12
Reset Uni-Direction
13 Set
Condense
mode
14 Reset
Condense
mode
15 Set
pseudo
letter
quality
21
Reset pseudo
letter
quality
17 Storing
bit
image data
18
Printing
bit
data previously written
After
the appropriate
OPEN
statement has
been
transmitted,
a
PRINT*
statement
is
required
to
transmit the
secondary address information to the specified
device
(in
this
case, your
printer).
Remember,
that
it
is
possible to
have as
many
as
ten
files
open
simultaneously. This allows
you
to
perform several formatting functions
at
one
time
on
the
data
in
the computer's
memory.
There
are
examples
of
the formatting capabilities
described
in
this
section
in
Appendix
A.
-19-