Epson LQ-860 - Impact Printer, User Manual

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Your printer has one command that allows you to use any of the
11
graphics options. The format of the command is:
ESC * m nl n2 data
In this command, m selects the graphics option and nl and n2
specify the number of columns to reserve for graphics. The available
graphics options are listed below:
Option
Pins
m
Horiz. density
dots/in.
Single-density
8 0 60
Double-density
8 1 120
High-speed double-density*
8 2 120
Quadruple-density*
8 3 240
CRT I
8 4 80
CRT II
8 6 90
Single-density
24 32 60
Double-density
24 33 120
CRT III
24 38 90
Triple-density 24
Hex-density* 24
* Adjacent dots cannot be printed in this mode.
39 180
40 360
Column Reservation Numbers
The graphics command requires more than one number to specify
how many columns to reserve because one line can use thousands of
columns, but the printer does not use numbers larger than 255 in
decimal. Therefore the graphics mode command uses two numbers,
nl and n2, for reserving columns.
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Software and Graphics