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Your P-80 is capable of printing special graphics characters and dot
graphics, but you do need some programming knowledge to use these
graphics features. This chapter is included for those who wish to
design their own programs to take advantage of the printer's graphics
capabilities.
Some computers allow you to draw figures on the screen using
graphics characters and then dump them to the printer using a screen
dump command. Check your computer's documentation to see if it
contains this feature.
Graphics Characters
The P-80 contains a set of special graphics characters which are the
same graphics characters available on the Geneva
graphics characters are accessed with ASCII codes 128 through 159. If
your computer cannot access codes greater than 127, you will not be
able to use the graphics characters.
To access the graphics characters in BASIC, you use CHR$(n)
where n is an ASCII code between 128 and 159. The following pro-
gram prints out all of the special characters in Expanded mode. Type
the program in exactly as shown and RUN it.
10 LPRINT CHR$(27)"W1"
20 FOR X=128 TO 138
30 LPRINT CHR$(X)" ";
40 NEXT X: LPRINT
50 FOR X=139 TO 149
60 LPRINT CHR$(X)" ";
70 NEXT X: LPRINT
Chapter 6
Graphics
PX-8™. The
TM
39
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