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a
c
109
downloaded and stored in RAM (Random Access Memory) for
use.
Designing
and printing
your own characters
has two re-
quirements:
firstly,
designing
the shape
of the character,
calculating the data necessary
to make the shape, and sending
that data to the printer, and secondary, sending the command to
print
the downloaded
characters
instead
of the
standard
characters.
There
are a number
of design
constraints
for
download draft quality characters:
l
The matrix or grid on which you design the characters is
five boxes wide by twenty-four
boxes high.
l
Horizontally,
dots may be centered
in a box, or may
straddle a line, making the actual character grid 9 dots
wide by 24 dots high. Vertically,
dots can only be
centered in a box. See Figure 7-2.
l
Dots cannot overlap - that is, you may not have a dot
inside a box next to one that is on a line.
i
Figure
7-2. Dots can be inside boxes or straddle the vertical
lines
of the grid.
i
P'
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