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

#### BBOXADR

Prolog

Control Block Contents
BBOXADR DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### BBOXADR Prolog

     Name       : BBOX
     Description: Boundary Box Addresses
     DSECT      : BBOXADR
     Function   : BBOX contains the beginning addresses of the
                  VSE partitions when CMS/DOS is active; one for
                  each entry. BBOXADR is called by the BBOX
                  macro.

#### BBOXADR Control Block Content

#### BBOXADR DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      BBOXADR        DSECT FOR ONE ENTRY IN BOUNDARY
    0000    0 Bitstring    4 PBEGIN         PARTN START ADDR
    0004    4 Signed       4 PENDLOG (0)    PARTN LOGICAL END
    0004    4 Bitstring    3 *
    0007    7 Bitstring    1 BBOPTDOS       PARTITION SUBPOOL EXISTS
    0008    8 Signed       4 PGEND (0)      GETVIS AREA END
    0008    8 Bitstring    3 *
    000B   11 Bitstring    1 BBOVSDOS       GETVIS SUBPOOL EXISTS
    000C   12 Bitstring    4 PFIXLMT        PFIX LIMIT ZERO FOR CMS
    0010   16 Bitstring    4 PFIXCNT        PFIX COUNT ZERO FOR CMS
    0014   20 Bitstring    4 BBOPARTN       DOS PARTITION START ADDRESS
              .... ...1      BBOPOOL        1 FOR BBOPTDOS AND BBOVSDOPS
              00000018       BBOXSIZE       (*-PBEGIN) SIZE OF BBOX

#### BBOXADR Storage Layout

    *** BBOXADR - Control Block in BBOXADR
    *
    *     +---------------------------+--------------------+------+
    *   0 |          PBEGIN           |////////////////////|:PTDOS|
    *     +--------------------+------+--------------------+------+
    *   8 |////////////////////|:VSDOS|         PFIXLMT           |
    *     +--------------------+------+---------------------------+
    *  10 |         PFIXCNT           |         BBOPARTN          |
    *     +---------------------------+---------------------------+
    *  18
    *
    *** BBOXADR - Control Block in BBOXADR

#### BBOXADR Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    BBOPARTN       0014
    BBOPOOL        0014 01
    BBOPTDOS       0007
    BBOVSDOS       000B
    BBOXSIZE       0014 00000018
    PBEGIN         0000
    PENDLOG        0004
    PFIXCNT        0010
    PFIXLMT        000C
    PGEND          0008

This information is based on z/VM V4R4.0.
Last updated on 28 Jul 2003 at 08:13:22 EDT.
Copyright IBM Corporation, 1990, 2003