The "Z" Command; Multiple-Line Exercise - Epson Printer Interface Cartridge for the Apple IIc Operation Manual

The "Z" Command

Some software (including ProDOS BASIC) automatically inserts
the control codes for a carriage return and a line feed after every
80 - 130 characters. This insertion is usually no problem with text, but
it can spoil your graphics. In the graphics mode it may insert the
control codes in the middle of a line.
You can usually prevent these unwanted control codes in ProDOS
BASIC with a "Z" command. The format is shown below:
PRINT CHR$(9);"Z"
Put this command in one of the first lines of all your graphics pro-
grams. It is easier to put it in all of your programs than to examine
each one to see whether or not such a statement is necessary.

Multiple-Line Exercise

Now that you've entered and run a simple graphics program, you
can go on to an exercise that shows you how the LX-90 combines
several lines of graphics for a figure taller than eight dots.
Start with a line for 100 columns of single-density graphics and lines
to print two pin patterns. Notice that since there are two pin patterns
in the loop, it is only executed
NEW
5 PRINT CHR$(d);"PR#l"
18 PRINT CHR$(q);"Z"
40
PRINT CHR$(27);"K";CHR$(lgfl);CHR$(0);
50 FOR X=1 TO 50: PRINT CHR$(85);CHR$(42);
60
NEXT X: PRINT
100 PRINT CHR$(27);"@"
300 PRINT CHR$(4);"PR#p"
If you run the program now, you'll see how one line of the pattern
looks:
times.
50
45