Graphics
Below is the BASIC program that prints the design shown on the
previous pages. Note that the data numbers in lines 80 through 140
are the same numbers that are at the bottom of each section in the
last illustration. The WIDTH statement in line 10 is for IBM PC
BASIC; the WIDTH statement format may be different for your
system.
10 WIDTH "LPT1:"
20 LPRINT
30
FOR
X=1 TO 126
40 READ N
50 LPRINT CHR$(N);
60 NEXT X
70 LPRINT
80 DATA 0,0,63,0,0,127,0,0,255,0,3,255,0,15,255,0,31,255
90 DATA 0,127,255,0,255,255,1,255,255,3,255,255,7,255,255,15,
255,255
100 DATA 31,255,254,31,255,252,31,255,240,31,255,240,31,255
224,31,255,192
110 DATA 31,255,0,31,252,0,31,240,0,31,224,0,31,128,0,31,240,0
120 DATA
31,0,126
130 DATA 15,128,15,7,192,7,3,240,7,1,254,7,0,255,7,0,127,135
140 DATA 0,31,199,0,7,231,0,1,247,0,0,255,0,0,127,0,0,63
In this program, line 20 assigns the graphics option (24-pin triple-
density) with code 39. Code 42 sets the number of pin columns at 42.
Lines 80 through 140 contain 126 bytes of data (42-pin columns x 3
bytes) for each pin column. Lines 30 through 60 print the design that
you see below:
A
4-18
Software and Graphics
