Epson MX-80 User Manual page 24

Chapter 9
There it is! We finally strapped these two pieces of high technology into harness
^-^and got us a real convoy.
G R E E T I N G S FROM THE V E R S A T I L E
m x
— e o
B Y E P S O N
J I
Y O U ' L L L I K E
ME!
Figure 2-2
RUN it again. This time open the lid and pull the paper bail forward to get a
better look at the print head in action.
Did you see it printing in both directions (except for the graphics characters)? Did
you see the head print the last line twice, to make the print darker? If not, RUN
it again and watch more carefully.
There is a lot going on here, so we'd better dissect the program to learn all about
it. Type LLIST to make a "hard copy". Use the line feed (LF button, remember?)
to roll the print-out past the lid. Tear it off and keep handy so we can study the
rogram as we go along.
SAVE the program on disk or tape to avoid having to type it in later.
Line By Line
Type NEW to erase the program. We're going to load it back in a line at a time,
analyzing it as we go. (An alternate strategy is to load the entire program back in
from disk or tape, then DELETE all the lines except 10.)
Line 10 is straightforward. We LPRINTed starting 13 spaces from the left.
Type it in and RUN it, watching the head action as it prints.
G R E E T I N G S FROM THE V E R S A T I L E
Figure 2-3
Well, that was rather "pedestrian".
Line 20 has 3 LPRINT statements on the same line, separated by semicolons,
vhich are usually optional. The first LPRINT TABs over 22 spaces, the
Xcond sends one of those special CURS (character string) codes we men-
tioned earlier, and the third prints "MX-X0".
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