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eight rows. Draw your graphics shape, and then calculate the
values of each vertical column of eight dots; each value becomes
one data byte. When drawing large shapes, the data byte
CHR$(255) (all pins firing, or a solid block of dots) is common.
A line spacing of 8/72 inch (using the (ESC) “A” CHR$(n),
where n=8), will ensure that successive rows of dots will join
perfectly.
HIGHER RESOLUTION GRAPHICS
There are seven graphics modes you can use; they are sum-
marized in Table 7-2.
Table 7-2
1(00Al-?
“CHR$(2)nl n2 ml m2 ...~
~rapnlcstype u
,,-- -~ts/inch)
(ESC)’’*’’CHR$(6) nl n2 ml m2 ...
You ‘will notice that the higher the density of the graphic
mode, the more points you will need to plot. Higher density
modes also take longer to print. The double density double
speed mode ignores every second column of dots to give you a
quick printout for debugging purposes; you can then change to
true double density graphics for “thefinal printout.
If your software cannot access the (ESC) “*” command, there
are individual letter escape commands for four of the modes.
See Table 7-3.