Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### TPLBK

Prolog

Control Block Contents
TPLBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### TPLBK Prolog

     NAME       : HCPTPLBK
     DESCRIPTION: TAPE LABEL CONTROL BLOCK
     DSECT      : TPLBK
     FUNCTION   : THE TAPE LABEL CONTROL BLOCK IS USED TO DESCRIBE THE
                  TAPE LABEL PUT ON TAPE.  ONLY ONE TPLBK IS CREATED
                  AND USED DURING I/O PROCESSING TO TAPE.
     LOCATED BY : TPETPLBK IN HCPTPEBK
     CREATED BY : HCPTPEIN - DURING INITIALIZATION OF I/O PROCESSING.
     DELETED BY : HCPTPEND - DURING TERMINATION OF I/O PROCESSING.

#### TPLBK Control Block Content

#### TPLBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      TPLBK          TAPE LABEL CONTROL BLOCK
    0000    0 Character    3 TPLVOL         LABEL IDENTIFIER
    0003    3 Bitstring    1 *              RESERVED FOR IBM USE
    0004    4 Signed       2 TPLSEQ         VOLUME SEQUENCE NUMBER
    0006    6 Signed       2 *              RESERVED FOR IBM USE
    0008    8 Character    8 TPLID          TAPE CREATOR IDENTIFICATION
    0010   16 Character    8 TPLCRDT        CREATION DATE
    0018   24 Character    8 TPLCRTM        CREATION TIME
    0020   32 Signed       4 TPLZONE        TIME ZONE DIFFERENTIAL
    0024   36 Signed       4 *              RESERVED FOR IBM USE
    0028   40 Character    8 TPLPNAME       PRODUCT NAME
    0030   48 Character    7 TPLPNUM        PRODUCT NUMBER
    0037   55 Character    1 *              RESERVED FOR IBM USE
    0038   56 Signed       4 *              RESERVED FOR IBM USE
    003C   60 Signed       4 *              RESERVED FOR IBM USE
    0040   64 Signed       4 *              RESERVED FOR IBM USE
    0044   68 Signed       4 *              RESERVED FOR IBM USE
    0048   72 Signed       4 *              RESERVED FOR IBM USE
    004C   76 Signed       4 *              RESERVED FOR IBM USE
              0000000A       TPLSIZE        (*-TPLBK+7)/8 SIZE OF TPLBK IN
                                            DOUBLEWORDS

#### TPLBK Storage Layout

    *** TPLBK - TAPE LABEL CONTROL BLOCK
    *
    *     +--------------------+------+-------------+-------------+
    *   0 |      TPLVOL        |//////|   TPLSEQ    |/////////////|
    *     +--------------------+------+-------------+-------------+
    *   8 |                        TPLID                          |
    *     +-------------------------------------------------------+
    *  10 |                       TPLCRDT                         |
    *     +-------------------------------------------------------+
    *  18 |                       TPLCRTM                         |
    *     +---------------------------+---------------------------+
    *  20 |         TPLZONE           |///////////////////////////|
    *     +---------------------------+---------------------------+
    *  28 |                       TPLPNAME                        |
    *     +------------------------------------------------+------+
    *  30 |                    TPLPNUM                     |//////|
    *     +---------------------------+--------------------+------+
    *  38 |///////////////////////////|///////////////////////////|
    *     +---------------------------+---------------------------+
    *  40 |///////////////////////////|///////////////////////////|
    *     +---------------------------+---------------------------+
    *  48 |///////////////////////////|///////////////////////////|
    *     +---------------------------+---------------------------+
    *  50
    *
    *** TPLBK - TAPE LABEL CONTROL BLOCK

#### TPLBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    TPLCRDT        0010
    TPLCRTM        0018
    TPLID          0008
    TPLPNAME       0028
    TPLPNUM        0030
    TPLSEQ         0004
    TPLSIZE        004C 0000000A
    TPLVOL         0000
    TPLZONE        0020

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 18:11:14 EDT.
Copyright IBM Corporation, 1990, 2002