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Each time the print head makes a horizontal pass, it prints a pattern
of dots. To print figures taller than 7 or 8 dots, the print head must
make more than one pass. Each pass of the print head contains one
piece of
total pattern, which can be as tall or short as you desire.
the
You don't
have
graphics figures. In fact, you can use as little or as much space as you
like for a figure-and put it anywhere on the page.
Graphics Mode
The command to enter the Graphics mode is quite different from
other commands covered so far in this manual. For graphics, you
the
must specify not only that you want to use graphics mode, but also in
what density and for how many columns.
There are two graphics densities, single and double. The format for
entering Single-Density Graphics mode is:
LPRINT CHR$(27)"K"CHR$(n
The
CHR$(27)"K"
numbers (n
and n
1
graphics. The format is the same as above for Double-Density, except
you use
CHR$(27)"L".
Column reservation numbers
The graphics mode requires two numbers to specify how many
columns of graphics you want because the CHR$ function in BASIC is
limited to the numbers between 0 and
dot positions in Single-Density and
more than one CHR$ number. Therefore, the Graphics mode com-
mand is designed to use two CHR$ numbers for reserving columns,
and you must supply two numbers even if you only need one.
The first number that you specify (n
columns
(0-255).
graphics." If you don't need more than 255 columns, you use a 0 for
n
.
2
To reserve more than
(n,) must be greater than 0. But n
single dots; it represents a number of groups, each of which contains
dots. Using a
256
dots plus whatever is in the first slot. For Double-Density Graphics,
to use the whole page or even an entire line for your
specifies Single-Density Graphics, and the two
) determine the number of columns reserved for
2
A
in
255
that
columns for graphics, the second number
255
in the second slot means reserve
1
) CHR$(n
);
1
2
Since you can specify
255.
in Double-Density, you need
960
) indicates a number of
1
position says "reserve
does not represent a number of
2
480
columns for
255
group of
1
256
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