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six boxes ,wide by nine boxes high.
l Horizontally, dots may be centered in a box, or may
straddle a line, making the actual character grid 11 dots
wide by 9 dots high. Vertically, dots can only be
centered in a box. See Figure 6-2.
l The minimum width of a character is five dots.
l Unlike standard characters that are restricted to a
height of seven dots, user-defined characters may use
eight dots vertically.
l Dots cannot overlap - that is, you may not have a dot
inside a box next to one that is on a line.
l You may define any position between ASCII 32 and 127.
LL Figure 6-2. Dots can be inside boxes or straddle the vertical lines
of the grid.
Photocopy the grid in Figure 6-3 to help design your new
characters. We will use a tiny representation of a chemist’s flask
for our example. We decided that our flask will not be a
“descender” (printing below the baseline of standard
characters), so a figure “1” is written next to Descender on the
grid. If your character is a descender, write a “0” next to
Descender.
Next we calculate the vertical numerical values of the columns
of dots. and enter them underneath the grid. For example, look-
ing at Figure 6-4, we see that in the left-most column there is
only one dot, and it is sitting in the “2” box. Thus its vertical
F