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

#### TBFBK

Prolog

Control Block Contents
TBFBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### TBFBK Prolog

     NAME       : HCPTBFBK
     DESCRIPTION: Trace service tool Buffer Format Block
     DSECT      : TBFBK
     FUNCTION   : Contains the format of the buffers used to
                  save merged entries from the trace table
                  onto tape
     CREATED BY : Not applicable
     DELETED BY : Not applicable
     NOTES      :
         USED BY - HCPTSI   : When building the buffers for
                              use by HCPTSMRG
                   HCPTSMRG : When merging trace entries
                   HCSTSF   : When reading the buffers from
                              tape
                   HCSTSS   : Trace read system services
                   HCSTSV   : Trace read tape processor

#### TBFBK Control Block Content

#### TBFBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      TBFBK          Trace service tool Buffer Format
                                            Block
    0000    0 Dbl-Word     8 TBFTOD         Time of day clock
    0008    8 Character   24 TBFVERST       Verification string
    0020   32 Signed       4 TBFZONE        TIME ZONE DIFFERENTIAL (FROM
                                            SYSZONE)
    0024   36 Bitstring   28 TBFDATA (145)  145 28-byte trace entries
              00000200       TBFSIZE        (*-TBFBK+7)/8 TBFBK size in
                                            doublewords

#### TBFBK Storage Layout

    *** TBFBK - Trace service tool Buffer Format Block
    *
    *     +-------------------------------------------------------+
    *   0 |                        TBFTOD                         |
    *     +-------------------------------------------------------+
    *   8 |                                                       |
    *     =                       TBFVERST                        =
    *     |                                                       |
    *     +---------------------------+---------------------------+
    *  20 |         TBFZONE           |                           |
    *     +---------------------------+                           |
    *  28 |                                                       |
    *     =                       TBFDATA                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *1000
    *
    *** TBFBK - Trace service tool Buffer Format Block

#### TBFBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    TBFDATA        0024
    TBFSIZE        0024 00000200
    TBFTOD         0000
    TBFVERST       0008
    TBFZONE        0020

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 18:05:19 EDT.
Copyright IBM Corporation, 1990, 2002