Chapter 4: Programming Commands54
Revision D 12/09
A799-PG00001D
Select or cancel user-dened character set
ASCII ESC % n
Hexadecimal 1B 25 n
Decimal 27 37 n
Value of n: 0 = Code Page 437
1 = User Dened (RAM)
2 = Code Page 850
Range of n: 0–2
Default: 0 (Code Page 437)
Selects the character set. When an undened RAM character is selected, the current active ROM code page character is
used. Look in Chapter 3: Programming the Printer, “Character appearance” for the character sets.
Exception:
The character sets cannot be used together on the same line.
Related information
In LEGACY emulation, the low order bit of n is used to select the user-dened character set and the current active ROM
code page is not affected.
Dene user-dened character set
ASCII ESC & s c1 c2 [character 1 data] ... [character k data]
Hexadecimal 1B 26 s c1 c2 [character 1 data] ... [character k data]
Decimal 27 38 s c1 c2 [character 1 data] ... [character k data]
Values and ranges:
s = 3, the number of bytes (vertically) in the character cell
c = the ASCII codes of the rst (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 dene only one character, use the same code for both c1 and c2
k = c2 – c1 + 1 = the number of characters to be dened in this command string
[character i data] = [ni d1 ... d(3 x ni)] for 1 ≤ i ≤ k
ni = the number of dot columns for the ith character, 1 ≤ ni ≤ 16
d = the dot data for the characters
The number of bytes for the ith character cell is 3 x ni.
The bytes are printed down and across each cell.
Denes and enters downloaded characters into RAM. The command may be used to overwrite single characters. User-
dened characters are available until power is turned off or the initialize printer command (1B 40) is received.
Any invalid byte (s, c1, c2, n1) aborts the command.
Related information
See 1D 22 n (select memory type) to save user-dened characters.
