MIDAW | Back to Index page

| Prolog Control Block Contents MIDAW DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

MIDAW Prolog | Top of page

     NAME       : HCPMIDAW
     DESCRIPTION: Modified indirect data addressing word mapping
     DSECT      : MIDAW
     FUNCTION   : Provide symbolic reference to the fields of a
                  modified indirect data address list
     LOCATED BY : N/A
     CREATED BY : N/A
     DELETED BY : NA
     RELOCATION CONSIDERATIONS : None

MIDAW Control Block Content | Top of page

     MIDAW DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      MIDAW          Modified indirect data addressing word mapping
    0000    0 Bitstring    5 MIDAWRES       Reserved
    0005    5 Bitstring    1 MIDAWFLG       MIDAW flag byte
              1... ....      MIDAWLST       X'80' MIDAWLST THIS IS THE LAST
                                            MIDAW
              .1.. ....      MIDAWSKP       X'40' MIDAWSKP SKIP DATA TRANSFER
                                            FOR THE MIDAW
              ..1. ....      MIDAWCCW       X'20' MIDAWCCW CCW translation
                                            prog check bit
    0006    6 Signed       2 MIDAWCNT       MIDAW count
    0008    8 Dbl-Word     8 MIDAWADR (0)   MIDAW data address
    0008    8 Signed       4 MIDAWADH       High half of data address
    000C   12 Signed       4 MIDAWADL       Low half of data address
    0010   16 Dbl-Word     8 MIDAWNXT (0)   Next MIDAW address
              00000010       MIDAWSIZ       (*-MIDAW) MIDAW size in bytes
              00000002       MIDAWSZD       (*-MIDAW+7)/8 MIDAW size in
                                            doublewords

MIDAW Storage Layout | Top of page

    *** MIDAW - Modified indirect data addressing word mapping
    *
    *     +----------------------------------+------+-------------+
    *   0 |            MIDAWRES              |:AWFLG|  MIDAWCNT   |
    *     +---------------------------+------+------+-------------+
    *   8 |         MIDAWADH          |         MIDAWADL          |
    *     +---------------------------+---------------------------+
    *
    *** MIDAW - Modified indirect data addressing word mapping

MIDAW Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    MIDAWADH       0008
    MIDAWADL       000C
    MIDAWADR       0008
    MIDAWCCW       0005 20
    MIDAWCNT       0006
    MIDAWFLG       0005
    MIDAWLST       0005 80
    MIDAWNXT       0010
    MIDAWRES       0000
    MIDAWSIZ       0010 00000010
    MIDAWSKP       0005 40
    MIDAWSZD       0010 00000002

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:29:10 EDT.
Copyright IBM Corporation, 1990, 2020