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Functions

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In addition to the standard functions listed below, this routine provides other functions which can be selected by specifying parameters (see “Optional functions”).

Standard functions

TPCOMP2 has a preset option which provides the following standard functions for tapes:

  1. Rewind both tapes to BOT at the start and end of the comparison run.

  2. Display differences in both hexadecimal and EBCDIC format on a 132-character printer.

  3. Terminate the comparison if a double tape mark is sensed.

(If a double tape mark for one tape is sensed, and the other tape is not also positioned at a double tape mark, the remaining data on the second tape is printed until the double tape mark is encountered.)

Optional functions

By the use of parameters (entered via SYSDTA), the following options can be selected:

  1. Positioning of tapes in a forward or reverse direction, based on a count of tape marks or blocks.

  2. Terminating the comparison on the basis of a given number of tape marks or blocks.

  3. Designating a 160-character printer; specifying print formats of hexadecimal, EBCDIC, or a combination of both.

  4. Processing of unblocked variable-length records or blocked fixed-length records.