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

#### MDAS

Prolog

Control Block Contents
MDAS DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### MDAS Prolog

     Name       : HCPTCMBK
     Description: MDAS maps an area in the TCMBK with
                  information for each address space used by
                  MDC.
     DSECT      : MDAS
     Notes      : Serialized by TCMPTELK when adding new address spaces.

#### MDAS Control Block Content

#### MDAS DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      MDAS           MDAS maps an area in the TCMBK
                                            with
    0000    0 Signed       4 MDALET         ALET for address space
    0004    4 Signed       4 MDASTO         Segment table origin
              00000008       MDASIZE        *-MDAS Size of address space
                                            fields
              00000003       MDASZSHF       3 Use this in a SRL instruction
                                            to "divide" by MDASIZE or SLL to
                                            "multiply"

#### MDAS Storage Layout

    *** MDAS - MDAS maps an area in the TCMBK with
    *
    *     +---------------------------+---------------------------+
    *   0 |          MDALET           |          MDASTO           |
    *     +---------------------------+---------------------------+
    *   8
    *
    *** MDAS - MDAS maps an area in the TCMBK with

#### MDAS Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    MDALET         0000
    MDASIZE        0004 00000008
    MDASTO         0004
    MDASZSHF       0004 00000003

This information is based on z/VM V4R3.0. Last updated on 1 May 2002 at 10:40:06 EDT.
Copyright IBM Corporation, 1990, 2002