VNPBK | Back to Index page

| Prolog Control Block Contents VNPBK 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.

VNPBK Prolog | Top of page

     NAME       : HCPVNPBK
     DESCRIPTION: HCPVINOP extended parameter list block
     DSECT      : VNPBK
     FUNCTION   : This DSECT maps the extended parameter list
                  created by HCPVINOP for HCPVOP.
     LOCATED BY : VOPEXPRM in the VOPBK
     CREATED BY : HCPVINOP when an extended parameter list
                  is necessary
     DELETED BY : N/A - assembled into the module invoking
                  HCPVINOP
     SERIALIZED : Task ownership
     RELOCATION CONSIDERATIONS : None
     COMMENTS   : None

VNPBK Control Block Content | Top of page

     VNPBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      VNPBK          HCPVINOP extended parameter list block
    0000    0 Dbl-Word     8 * (0)
    0000    0 Signed       4 VNPEXFLG (0)   Word of parameter flags - an
                                            extension of the flags passed to
                                            HCPVOP in R2.
    0000    0 Bitstring    1 VNPEXFB0       Byte 0 of VNPEXFLG
              1... ....      VNPBAUTO       X'80' VNPBAUTO BUFADDR=AUTO was
                                            specified
              .1.. ....      VNPLNFLD       X'40' VNPLNFLD The length to be
                                            fetched or stored is within the
                                            DIAGNOSE parameter list. VNPLENFD
                                            indicates where the length can be
                                            found, and VNPLUNIT specifies the
                                            units in which the length is
                                            specified.
              ..1. ....      VNPMXLEN       X'20' VNPMXLEN The user specified
                                            a maximum length to fetch.
                                            VNPMAXLN specifies where this
                                            length (in DWs) can be found.
    0001    1 Bitstring    1 VNPEXFB1       Byte 1 of VNPEXFLG
    0002    2 Bitstring    1 VNPEXFB2       Byte 2 of VNPEXFLG
    0003    3 Bitstring    1 VNPEXFB3       Byte 3 of VNPEXFLG
    0004    4 Bitstring    1 VNPVARST (0)   Start of the variable section of
                                            the VNPBK.
            Information present if LENFIELD was specified on
            HCPVINOP.
    0004    4 Signed       4 VNPLFLDP (0)   Start of the information related
                                            to the LENFIELD operand.
    0004    4 Signed       4 VNPLENFD       Base and displacement of the
                                            field from which to get the
                                            length to fetch. The field must
                                            be 2 bytes long.
    0008    8 Signed       4 VNPLUNIT       Units in which the length to
                                            fetch is expressed.
    000C   12 Address      2 VNPMAXLN       Maximum length to fetch, in DWs.
                                            Specified only if VNPMXLEN is on.

VNPBK Storage Layout | Top of page

    *** VNPBK - HCPVINOP extended parameter list block
    *
    *     +------+------+------+------+
    *   0 |:EXFB0|:EXFB1|:EXFB2|:EXFB3|
    *     +------+------+------+------+
    *
    *** VNPBK - HCPVINOP extended parameter list block

    *** Overlay for VNPVARST in VNPBK
    *
    *                                 +---------------------------+
    *   0 ...                       4 |         VNPLENFD          |
    *     +---------------------------+-------------+-------------+
    *   8 |         VNPLUNIT          |  VNPMAXLN   | E
    *     +---------------------------+-------------+
    *
    *** Overlay for VNPVARST in VNPBK

VNPBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    VNPBAUTO       0000 80
    VNPEXFB0       0000
    VNPEXFB1       0001
    VNPEXFB2       0002
    VNPEXFB3       0003
    VNPEXFLG       0000
    VNPLENFD       0004
    VNPLFLDP       0004
    VNPLNFLD       0000 40
    VNPLUNIT       0008
    VNPMAXLN       000C
    VNPMXLEN       0000 20
    VNPVARST       0004

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:31:40 EDT.
Copyright IBM Corporation, 1990, 2020