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

#### ACCBK

Prolog

Control Block Contents
ACCBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### ACCBK Prolog

     Name       : HCPACCBK
     Description: Initial file system access block
     DSECT      : ACCBK
     Function   : The ACCBK contains information that
                  describes what the CP file system's initial
                  access order should look like.
     Created by : HCPZPQ
     Deleted by : HCPZIACI

#### ACCBK Control Block Content

#### ACCBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      ACCBK          Initial file system access block
    0000    0 Signed       2 ACCBKNUM       Maximum number of slots
    0002    2 Signed       2 *              Reserved for future IBM use
    0004    4 Signed       4 *              Reserved for future IBM use
    0008    8 Bitstring    1 ACCBKV (0)     Start of variable length data
    0008    8 Character    8 ACCUSRID       Userid for minidisk
    0010   16 Signed       2 ACCVDEV        Virtual address of minidisk
    0012   18 Bitstring    1 ACCOPTS        Options used with linking
              .1.. ....      ACCBNLNK       X'40' ACCBNLNK Do a DEFINE MDISK
              ..1. ....      ACCBNCAC       X'20' ACCBNCAC Don't do cache
    0013   19 Bitstring    1 ACCMODE        Access mode to use (same as
                                            DDEVMODE)
              0000000C       ACCELEN        *-ACCUSRID Length of variable
                                            portion
    0008    8 Bitstring  312 ACCSTMTS       Space for this many
              00000028       ACCSIZED       (*-ACCBK+7)/8 Length of area in
                                            d-words

#### ACCBK Storage Layout

    *** ACCBK - Initial file system access block
    *
    *     +-------------+-------------+---------------------------+
    *   0 |  ACCBKNUM   |/////////////|///////////////////////////|
    *     +-------------+-------------+---------------------------+
    *   8 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *
    *** ACCBK - Initial file system access block

    *** Overlay for ACCBKV in ACCBK
    *
    *     +-------------------------------------------------------+
    *   8 |                       ACCUSRID                        |
    *     +-------------+------+------+---------------------------+
    *  10 |  ACCVDEV    |:OPTS |:MODE | 14
    *     +-------------+------+------+
    *
    *** Overlay for ACCBKV in ACCBK

    *** Overlay for ACCBKV in ACCBK
    *
    *     +-------------------------------------------------------+
    *   8 |                                                       |
    *     =                       ACCSTMTS                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 140
    *
    *** Overlay for ACCBKV in ACCBK

#### ACCBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    ACCBKNUM       0000
    ACCBKV         0008
    ACCBNCAC       0012 20
    ACCBNLNK       0012 40
    ACCELEN        0013 0000000C
    ACCMODE        0013
    ACCOPTS        0012
    ACCSIZED       0008 00000028
    ACCSTMTS       0008
    ACCUSRID       0008
    ACCVDEV        0010

This information is based on z/VM V6R1.0. Last updated on 18 Feb 2010 at 08:22:22 EDT.
Copyright IBM Corporation, 1990, 2008