TransAct Ithaca 280 Programmer's Manual page 167

Programming Codes
ASCII [ESC] + 1 <low byte> <high byte>
Hexadecimal 1BH 2BH 31H
Decimal <27> <43> <49>
Description The [ESC] + 1 command sets the download font ID. This command is
used to set the font ID before sending/downloading character definitions.
This command does NOT select the font for printing. This command is
not used during normal printing use of the printer.
Function Set Font Descriptor
ASCII [ESC] + 2
Hexadecimal 1BH 2BH 32H
Decimal <27> <43> <50>
Description The [ESC] + 2 command is used to send a font header/descriptor to the
printer.
description. This length must be 64. The format of this font header uses
the ―HP PCL Soft Font Design‖ version 4 (PCL4). The description of PLC
Soft Font technology is not discussed here. Not all of the values in the
header are used, but they should be set to a reasonable value in case
they are used in future implementations. . This command is not used
during normal printing use of the printer.
NOTE: There is a font downloading utility available from TransAct. Call
TransAct sales or technical support for more information.
WARNING: You must have proper rights to use a font in this manner.
Do not download a font to the printer if you do not have the right to use
the font as a downloaded printer font.
Function Select Font
ASCII [ESC] + 3 <low byte> <high byte>
Hexadecimal 1BH 2BH 31H
Decimal <27> <43> <51>
Description The [ESC] + 3 command selects the downloaded font for printing. This
command is used to select the previously downloaded font for printing.
Function Set Character Code ID
ASCII [ESC] + 4 <low byte> <high byte>
Hexadecimal 1BH 2BH 34H
Decimal <27> <43> <52>
Description The [ESC] + 4 command sets the download character ID. This command
is used to set the character ID before sending/downloading the
character's definition. This command is not used during normal printing
use of the printer.
28-04430
The first byte of the descriptor is the length of the header
Rev K
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iTherm 280 Programmer's Guide
Page 155