PRINT instruction

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The PRINT instruction controls the amount of detail printed in the listing of programs.

sequence_symbol: Is a sequence symbol.
operand: Is an operand from one of the groups of operands described in the following sections. If a null operand is supplied, it is accepted by the assembler with no effect on the other operands specified. The operands are listed in hierarchic order. The effect, if any, of one operand on other operands is also described.

ON: Instructs the assembler to print, or resume printing, the source and object section of the assembler listing.
OFF: Instructs the assembler to stop printing the source and object section of the assembler listing. A subsequent PRINT ON instruction resumes printing.
When this operand is specified the printing actions requested by the GEN, DATA, MCALL, and MSOURCE operands do not apply.

GEN

Instructs the assembler to print all statements generated by the processing of a macro. This operand does not apply if PRINT OFF has been specified.

NOGEN

Instructs the assembler not to print statements generated by conditional assembly or the processing of a macro. This applies to all levels of macro nesting; no generated code is displayed while PRINT NOGEN is in effect. If this operand is specified, the DATA operand does not apply to constants that are generated during macro processing. Also, if this operand is specified, the MSOURCE operand does not apply. When the PRINT NOGEN instruction is in effect, the assembler prints one of the following on the same line as the macro call or model statement:

The object code for the first instruction generated. The object code includes the data that is shown under the ADDR1 and ADDR2 columns of the assembler listing.
The first eight bytes of generated data from a DC instruction

When the assembler forces alignment of an instruction or data constant, it generates zeros in the object code and prints the generated object code in the listing. When you use the PRINT NOGEN instruction the generated zeros are not printed.

Note: If the next line to print after macro call or model statement is a diagnostic message, the object code or generated data is not shown in the assembler listing.

The MNOTE instruction always causes a message to be printed.

NODATA: Instructs the assembler to print only the first eight bytes of the object code of constants. For object code generated by CNOP instructions, only the first 16 bytes of object code will be printed. This operand does not apply if PRINT OFF has been specified. If PRINT NOGEN has been specified, this operand does not apply to constants generated during macro processing.
DATA: Instructs the assembler to print the object code of all constants in full. This operand does not apply if PRINT OFF has been specified. If PRINT NOGEN has been specified, this operand does not apply to constants generated during macro processing.

NOMCALL: Instructs the assembler to suppress the printing of nested macro call instructions.
MCALL: Instructs the assembler to print nested macro call instructions, including the name of the macro definition to be processed and the operands and values passed to the macro definition. The assembler only prints the operands and comments up to the size of its internal processing buffer. If this size is exceeded the macro call instruction is truncated, and the characters ... MORE are added to the end of the printed macro call. This does not affect the processing of the macro call.
This operand does not apply if either PRINT OFF or PRINT NOGEN has been specified.

MSOURCE: Instructs the assembler to print the source statements generated during macro processing, as well as the assembled addresses and generated object code of the statements. This operand does not apply if either PRINT OFF or PRINT NOGEN has been specified.
NOMSOURCE: Instructs the assembler to suppress the printing of source statements generated during macro processing, without suppressing the printing of the assembled addresses and generated object code of the statements. This operand does not apply if either PRINT OFF or PRINT NOGEN has been specified.

UHEAD: Instructs the assembler to print a summary of active USINGs following the TITLE line on each page of the source and object program section of the assembler listing. This operand does not apply if PRINT OFF has been specified.
NOUHEAD: Instructs the assembler not to print a summary of active USINGs.

NOPRINT: Instructs the assembler to suppress the printing of the PRINT statement in which it is specified. The NOPRINT operand must only be specified with one or more other operands.

The PRINT instruction can be specified any number of times in a source module, but only those operands specified in the instruction change the current print status.

PRINT options can be generated by macro processing during conditional assembly. However, at assembly time, all options are in force until the assembler encounters a new and opposite option in a PRINT instruction.

The PUSH and POP instructions, described in PUSH instruction and POP instruction, also influence the PRINT options by saving and restoring the PRINT status.

You can override the effect of the operands of the PRINT instruction by using the PCONTROL assembler option. For more information about this option, see the section PCONTROL in the HLASM Programmer's Guide.

Unless the NOPRINT operand is specified, or the assembler listing is suppressed by the NOLIST assembler option, the PRINT instruction itself is printed.