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Creating Your Own Characters
117
use whatever is most convenient for you-perhaps seldom-used
keys can be replaced by more useful characters. In our example,
we'll assign the bullet a value of 43, which is the ASCII value for
the " + " character. This way, when we want to print a bullet, all
we have to do is send the printer a + .
To make our demonstration of download characters more
complete, we've designed two more characters. To avoid confu-
sion between the letter "0" and zero, we have created a slashed
zero to replace Radix's zero (ASCII 48). And, since some people
prefer the "lb" abbreviation for pound, we've replaced Radix's
"#" symbol (ASCII 35) with a "lb." The information on the grids is
now complete (except for proportional width data-a
more
advanced topic we'll take up shortly).
Download character definition command
You've read through a long explanation of download charac-
ters and we haven't even told you the command syntax yet! Now
the wait is over. This is the most complex command in the Radix
repertoire and now you've got the necessary knowledge to imple-
ment it. Here it is:
(ESC) fl*1' CHR$(1) nln2mlm2m3m4m5m6m7m8m9mlOmll
'16
+
m
Wldl"
tJ,a,
/27
0 0 0 54 0
ou7W6S
o
Figure 11-9. Character designs for
our
three characters.
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