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

#### CASBK

Prolog

Control Block Contents
CASBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### CASBK Prolog

     Name       : HCPVEXBK
     Description: Map Contiguous Available Slots
     DSECT      : CASBK
     Notes      :
                  The following describes a CASBK - group of contiguous
                  available slots in the current extent.  They are
                  located in VEXSPACA or VEXPGACA.

#### CASBK Control Block Content

#### CASBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      CASBK          Map Contiguous Available Slots
    0000    0 Bitstring    1 CASLEN         Number of slots
    0001    1 Bitstring    1 CASNXT         Pointer to next CASBK
    0002    2 Signed       2 CASLOC         Starting slot
              00000004       CASSZ          (*-CASBK) Size of one CASBK
              00000010       CASNUM         16 Number of CASBKs in VEXSPACA
                                            or VEXPGACA.

#### CASBK Storage Layout

    *** CASBK - Map Contiguous Available Slots
    *
    *     +------+------+-------------+
    *   0 |CASLEN|CASNXT|   CASLOC    | 4
    *     +------+------+-------------+
    *
    *** CASBK - Map Contiguous Available Slots

#### CASBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    CASLEN         0000
    CASLOC         0002
    CASNUM         0002 00000010
    CASNXT         0001
    CASSZ          0002 00000004

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 18:20:51 EDT.
Copyright IBM Corporation, 1990, 2002