Epson A794-D100 User Manual

Page 77

A794 Owner’s Guide

Chapter 6: Programming Information

March 1999

Define User-Defined Character Set

Defines and enters downloaded characters into RAM. The command may be used to
overwrite single characters. User-defined characters are available until power is turned
off or the Initialize Printer command (1B 40) is received.

Any invalid byte (s, c1, c2, n1, n2) aborts the command.

ASCII

ESC & s c1 c2 n1 d1 ... nn dn]

Hexadecimal

1B 26 s c1 c2 n1 d1 ... nn dn]

Decimal

27 38 s c1 c2 n1 d1 ... nn dn]

Values and Ranges

s = 3, the number of bytes (vertically) in the character cell

c = the ASCII codes of the first (c1) and last (c2) characters respectively

c1 = Hex 20-FF (20 is always printed as a space)
c2 = Hex 20-FF (20 is always printed as a space)

To define only one character, use the same code for both c1 and c2

n = the number of dot columns for the nth character as specified by n1 ... nn

n = 1-16

d = the column data for the nth character as specified by d1 ... dn

The number of bytes for a character cell is s x n1

The bytes are printed down and across each cell

See the illustration.

Top of Character

MSB

LSB