Toshiba B-EP Series Interface Specification page 607

8.10.55 MACRO DEFINITION START/END COMMAND
Function Specifies the start or end of a macro.
Format [GS] :
Term ASCII: GS :
Hex: 1Dh 3Ah
Explanation (1) If this command is included under normal operation, the start of a macro definition
will be specified. If this command is included while a macro is being defined, the
end of the macro definition will be specified.
(2) If the Macro Execute Command ([GS] ^) is included while the macro is being
defined, the macro definition will be aborted, and cleared.
(3) A macro is "undefined" initially.
(4) Undefined items are not cleared by the Initialize Command ([ESC] @).
(5) If [GS] : is included immediately after the receipt of this command, a micro will
become "undefined."
(6) The maximum permissible number of bytes for a macro definition will be limited to
2,048, even if it exceeds 2,048.
Reference Macro Execute Command ([GS] ^)
CHAPTER 8 ESC/POS MODE (INTERFACE COMMANDS)
[GS] :
8-80
B-EP Series