Epson SQ-2550, User Manual

Page: 133 / 315

Graphics
Here is the BASIC program
that
prints the design shown on the
previous pages. Notice that the data numbers in lines 80-140
are the same numbers that you see in the last illustration. Also
note that the WIDTH statement in line 10 is for IBM PC BASIC;
the format may be different for your system.
10 WIDTH "LPT1:",255
20 LPRINT CHR$(27)"*"CHR$(39)CHR$(42)CHR$(0);
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 31,255,254,31,255,252,31,255,248,31,255,240,31,255,
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 31,255,192,28,255,224,28,127,240,28,15,248,30,0,252,
In this program, line 20 assigns the graphics option (24-element
triple-density) with code 39. Code 42 sets the number of nozzle
columns at 42. Lines 80-140 contain 126 bytes of data (42 nozzle
columns X 3 bytes) for each nozzle column. Lines 30-60 print
the design that you see below.
A
Notice that the dots overlap quite a bit. This design was
printed using the triple-density 24-element graphics option
because the density is
the
same 180 dots to the inch in both
directions.
4-18 Software and Graphics