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50
Here, the value of n defines the print style to be selected. The
value of n can range from 0 to 255, which is the range of values
that can be stored in one eight-bit byte. If you look at each bit in
this byte, you'll find that each one represents
a printing style
variation. Adding the binary values of the selected bits gives the
value of n for a particular
combination
of print styles.
Table 5-10 shows the decimal values of the bits in the Master
Print byte. To calculate the value
n
for a particular combination
of printing styles, just add the values of the features that you
want to combine.
Table 5-10
Values of mixing print styles for Master Print
Bit
1 Print style
I
Decimal value
1
1 Elite mint
1
2
Proportional print
2
3
Condensed print
4
4
(Not used)
I5
1 Boldface mint
I
16
I
6
Expanded print
32
7
(Not used)
8
Underline
128
For example,
if you want to select elite expanded
boldface
print, you would calculate the value of n like this:
Elite
1
Boldface
16
Expanded
32
n=
49
The command would look like this:
CHR$(27);"!";CHR$(49)
To better understand
the way the print modes work, consider
that each mode except pica (pica is the default) has a separate
switch that can turned on and off via software. Once the switch
is on, it stays on until turned off. When two modes that conflict
are turned on at the same time, the printer must choose which
one to use.
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