IBM TM7 - Manual (Page 141)

Example: 11 half-dots wide (or 5.5 full dots) × 9 high
Defined as:
X'1B26034141FO00080014000200110000081100020014000800F000'
The above statement defines character X'41' as an ‘A’.
Note: The number of data bytes = 2 × dot width (11) = 22 bytes.
Error Conditions:
Flash EPROM load error - Verify the sector was erased before downloading
images.
Download Double-Byte Characters
RS-232 Syntax:
ESC ( s n data or X'1B;28;s;n;data'
where:
s The character set being defined.
0 Character set for the thermal station (must be 24x24 matrix)
1 Character set for the impact station (must be either 16x16
matrix or 9x16 matrix)
n The number of characters being downloaded.
data The address of the character being loaded (2 bytes) followed by the
character data.
v For the impact station, there are 32 bytes per character – 2 bytes
for each slice (dot wide). The total number of data bytes = n *
34.
v For the thermal station, there are 72 bytes per character – 3
bytes for each row (dot high). The total number of data bytes = n
* 74.
Purpose:
To define a matrix pattern for double-byte characters stored in the flash
EPROM.
Remarks:
v Once the characters are downloaded to the printer, they will remain valid
until the user redefines them. This is true even if you power off the
printer.
updated March 18, 2002
Appendix C. RS-232 Programming Information 117