Table of Contents
Advertisement
Chapter 4
So what does all this higher mathematics have to do with graphics? Just this. If
we are to create high-resolution graphics on the MX-70, we have to eliminate
the "dead space" between letters by changing the automatic line spacing to
some value less than l/6 inch. We certainly don't want a blank space 5 dots high
between our rows of graphics!
The Line Spacing is Variable
Now that we understand the dot matrix concept and standard 12 dot "top-to-
top" vertical spacing, let's learn how to change it to suit our specific needs.
Type in this NEW program:
9 PR
# l
20 PRINT "LINE ONE"
30 PRINT "LINE TWO"
40 PRINT "LINE THREE"
49 PR #0
and RUN.
Nothing new here. Just like we're used to.
Let's all add line 10:
10 PRINT CHR$ (27) "A" CHR$ (12)
and RUN.
Same as before. Nothing changed. Then what is line 10 all about?
34
(Apple)
(Apple)
L I N E O N E
L I N E T W O
LINE THREE
Figure 4-5
(or 12 + 128 = 140)
Advertisement
Table of Contents
