Epson LX-90 User Manual - Apple IIc 8699 PIC for LX-90 - Page 49

Density Varieties, This uses the term

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the loop is executed, the program prints lines 50 and 80 alternately so that the patterns of the print lines will fit together well. Notice that the graphics command can be in effect for only one print line. The command is in lines 40 and 70 so that it is issued each time a new print line is begun. To print more than one line of graphics, the graphics command must be issued before each line. Line 100 is the reset code to return the printer to its defaults. Density Varieties Although all the examples so far in this chapter have been in the single-density graphics mode, the LX-90 offers five other eight-pin density modes and two nine-pin ones. Nine-pin graphics is not necessary for most uses, but you can find its command (Escape ""') in Appendix C. All the eight-pin densities and their commands are described in Table 7-1. Table 7-l. Graphics modes This chapter uses the term dot positions instead of dots for two densities: high-speed double and quadruple. Because the LX-90 does not print consecutive dots in a row in these densities, it cannot print dots in all the possible dot positions in any one row. For example, an 47

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the loop is executed, the program prints lines 50 and 80 alternately so
that the patterns of the print lines will fit together well.
Notice that the graphics command can be in effect for only one
print line. The command is in lines 40 and
70
so that it is issued each
time a new print line is begun. To print more than one line of graphics,
the graphics command must be issued before each line.
Line 100 is the reset code to return the printer to its defaults.
Density Varieties
Although all the examples so far in this chapter have been in the
single-density graphics mode, the LX-90 offers five other eight-pin
density modes and two nine-pin ones. Nine-pin graphics is not neces-
sary for most uses, but you can find its command (Escape ““‘) in
Appendix C. All the eight-pin densities and their commands are
described in Table 7-1.
Table 7-l. Graphics modes
This chapter uses the term
dot positions
instead of
dots
for two
densities: high-speed double and quadruple. Because the LX-90 does
not print consecutive dots in a row in these densities, it cannot print
dots in all the possible dot positions in any one row. For example, an
47