NCR 7158, Owner'S Manual, Page: 257 / 314

Chapter 7: Programming Guide 7-129
Macro Commands
These commands are used to select and perform a user-defined
sequence of printer operations.
Start or End Macro Definition
ASCII: GS :
Hexadecimal: 1D 3A
Decimal: 29 58
Starts or ends macro definition. Macro definition begins when this
command is received during normal operation and ends when this
command is received during macro definition. The macro definition is
cleared, during definition of the macro, when the Execute Macro (1D
5E) command is received.
Normal printing occurs while the macro is defined. When the power is
turned on the macro is not defined.
The defined contents of the macro are not cleared by the Initialize
Printer (1B 40), thus, the Initialize Printer (1B 40) command may be
used as part of the macro definition.
If the printer receives a second Select or Cancel Macro Definition (1D
3A) command immediately after previously receiving a Select or
Cancel Macro Definition (1D 3A) the printer remains in the macro
undefined state.
Formulas:
The contents of the macro can be defined up to 2048 bytes.
Exceptions:
If the macro definition exceeds 2048 bytes, excess data is not stored.
This command is available in A758 Native Mode only.