IDFCBE - Provide FCBE with symbolic names

Macro type: type O

The IDFCBE macro generates a Dsect for the FCB extension of the 24-bit TU FCB. If a base register is initialized appropriately, the user can symbolically address the fields in the FCB extension.

This FCB extension is only created if the 24-bit FCB has been generated, and if the BUFOFF, FSEQ and LABEL operands in the FILE or FCB macro were specified for tape processing. If this is not the case, then no IDFCBE macro will be needed.

In order to determine the start address of the FCBE, the IDFCB macro (with PARMOD=24) is required in addition to the IDFCBE macro.

As the 31-bit FCB has no FCB extension (FCBE), the IDFCBE macro is not supported in an XS environment.

Format

Operation	Operands
IDFCBE	[D] [,prefix / ,*]

Operand descriptions

D

This operand specifies that a Dsect statement is to be generated; by default, no Dsect is generated.

prefix

Prefix (1 character) which is to be inserted in front of all Dsect names; by default, this is the letter “I”.

*
No prefix will be used.