First Graphics Program - Epson Printer Interface Cartridge for the Apple IIc Operation Manual

Now that you know the principles of Epson graphics, you're ready
for two simple exercises, more densities, and then something more
complex as a basis for writing your own programs.

First Graphics Program

Your first graphics exercise could be a program that prints a single
column of dots, but it is difficult to see the pattern in a single column of
dots, so your first graphics program prints the same pattern 40 times.
Line 10 is the code for 40 columns of single-density graphics. As
usual, the example is in BASIC, but you can adapt it to the program-
ming language you prefer.
NEW
5
PRINT CHR$(A);"PR#l"
l@ PRINT CHR$(27);"K";CHR$(&);CHR$(0);
388
PRINT CHR$(4);"PR#$Y'
The second line is the data that is printed as pin patterns. Be sure
that you type in the semicolons in both lines:
2a FOR X=1 TO
That's it. Run the program to see the result below. Although it is not
as interesting as the examples at the beginning of this chapter, it does
allow you to see exactly how the mode works.
44
40:
PRINT CHR$(74);: NEXT X