The ICTL instruction changes the begin, end, and continue columns that establish the coding format of the assembler language source statements.
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Use the ICTL instruction only once, at the very beginning of a source program. If no ICTL statement is used in the source program, the assembler assumes that 1, 71, and 16 are the begin, end, and continue columns, respectively.
With the ICTL instruction, you can, for example, increase the number of columns to be used for the identification or sequence checking of your source statements. By changing the begin column, you can even create a field before the begin column to contain identification or sequence numbers. For example, the following instruction designates the begin column as 9 and the end column as 80. Since the end column is specified as 80, no continuation records are recognized.
ICTL 9,80
COPY Instruction: The ICTL instruction does not affect the format of statements brought in by a COPY instruction or generated from a library macro definition. The assembler processes these statements according to the standard begin, end, and continue columns described in Field boundaries.
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