Filter
Top Products
Option Pins m
Horizdtiz;;sity
Single-density
8
0
60
Double-density
8
1
120
High-speed double-density*
8
2
120
Quadruple-density*
8 3
240
CRT I
a
4
80
pi
* Adjacent dots cannot be printed in this mode.
Column reservation numbers
The graphics command requires more than one number to specify how
many columns to reserve, since one line may use thousands of columns
but the printer does not use numbers larger than 255 in decimal.
Therefore, the graphics mode command uses two numbers for reserving
columns.
To figure
nl
and
n2,
divide the total number of columns by 256. The
quotient is
rr.2;
the remainder is
nl.
Since the command is set up for two
numbers, you must supply two even if you need only one. When you
need fewer than 256 columns, just make
nl
the number of columns you
are reserving and make
n2
a zero.
For example, if you wish to send 1632 columns of graphics data,
nl
should be 96 (the remainder) and
rr.2
should be 6 (the quotient) because
1632 = (6 x 256) + 96.
The printer interprets the number of bytes determined by
nl
and
rr2
as
graphics data, no matter what codes they are. This means that you must
be sure to supply enough bytes of graphics data or the printer will stop
and wait for more data and will seem to be locked. If, however, you
supply too much graphics data, the printer will interpret and print the
excess as regular text.
Using Software and Graphics
4-17