Epson LQ-850 User Manual page 169

All three formats are equivalent, so you can pick the one best
suited to your purpose. For instance, a BASIC programmer might
refer to the first and second formats, a word processor might use
the second, and a machine code programmer would use the third
format. Variables are represented by italicized letters such as n, nl,
m. The variables are explained in the comments section.
Some application programs make use of control key sequences.
See the Control key chart on page 9-4 of this chapter.
For the following commands that use only 0 or 1 for the variable,
either the ASCII codes 0 and 1 or the ASCII characters 0 and 1 can
be used:
ESC U, ESC x, ESC p, ESC W, ESC S, ESC -,
ESC % and ESC w
For example, in BASIC you can turn on double-wide with either of
these statements:
LPRINT CHR$(27);"W";CHR!$(l)
LPRINT CHR$(27);"W';"l"-ASCII
These correspond to:
ESC W SOH or ESC W1
Examples
The simplest type of command consists of sending a single
character to the printer. For instance, to print in condensed mode,
you send the code 15. The code format is:
ASCII code: SI
Decimal:
Hexadecimal: OF
15
-ASCII Code
Character
9-3