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

#### NSDBK

Prolog

Control Block Contents
NSDBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### NSDBK Prolog

     NAME       : HCPNSDBK
     DESCRIPTION: DEFSEG/DEFSYS parameter control block
     DSECT      : NSDBK
     FUNCTION   : The HCPNSDBK is a parameter area used for
                  DEFSEG/DEFSYS.
     LOCATED BY : None
     CREATED BY : HCPNSD
     DELETED BY : HCPNSD

#### NSDBK Control Block Content

#### NSDBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      NSDBK          DEFSEG/DEFSYS parameter control
                                            block
    0000    0 Bitstring    1 NSDOPTFG       Operand/option flag
              ...1 ....      NSDMINSZ       X'10' If on, indicates MINSIZE
                                            operand was specified.
              ..1. ....      NSDPREGS       X'20' If on, indicates PARMREGS
                                            operand was already specified
              .1.. ....      NSDSAMER       X'40' If on, indicates that
                                            SAMErange operand was already
                                            specified
              1... ....      NSDSSP         X'80' If on, indicates that the
                                            SPACE operand was already
                                            specified
    0001    1 Bitstring    1 NSDERRFG       Error flag
              1... ....      NSDMSSCL       X'80' Indicate that the MSS (R8)
                                            SDFBK is to be closed
              .1.. ....      NSDMSSPU       X'40' Indicate that the MSS (R9)
                                            SDFBK is to be purged
              ..1. ....      NSDSSPCL       X'20' Indicate that the SSP (R8)
                                            SDFBK is to be closed
              ...1 ....      NSDSSPPU       X'10' Indicate that the SSP (R8)
                                            SDFBK is to be purged
              .... 1...      NSDNOMSG       X'08' Indicates to exit without
                                            sending a message
    0002    2 Bitstring    1 NSDSTAFG       Status flag
              1... ....      NSDMSSOR       X'80' Indicates that the member
                                            was found opened for reads
              .1.. ....      NSDNEWSP       X'40' Indicates a new SSP
                                            created. No need to return frame
                                            from the call to HCPNSCFA.
              ..1. ....      NSDSSPOR       X'20' Indicates that the segment
                                            space was found opened for read
    0003    3 Bitstring    1 NSDLCKFG       *NSS SDF queue lock status
              1... ....      NSDSDFEX       X'80' Indicates that the *NSS SDF
                                            queue lock is held exclusively
              ..1. ....      NSDSDFNO       X'20' Indicates that the *NSS SDF
                                            queue lock is not held
              00000001       NSDBKDSZ       (*-NSDBK+7)/8 NSDBK block size in
                                            DW's
              00000004       NSDBKBSZ       (*-NSDBK) NSDBK block size in
                                            bytes

#### NSDBK Storage Layout

    *** NSDBK - DEFSEG/DEFSYS parameter control block
    *
    *     +------+------+------+------+
    *   0 |:OPTFG|:ERRFG|:STAFG|:LCKFG| 4
    *     +------+------+------+------+
    *
    *** NSDBK - DEFSEG/DEFSYS parameter control block

#### NSDBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    NSDBKBSZ       0003 00000004
    NSDBKDSZ       0003 00000001
    NSDERRFG       0001
    NSDLCKFG       0003
    NSDMINSZ       0000 10
    NSDMSSCL       0001 80
    NSDMSSOR       0002 80
    NSDMSSPU       0001 40
    NSDNEWSP       0002 40
    NSDNOMSG       0001 08
    NSDOPTFG       0000
    NSDPREGS       0000 20
    NSDSAMER       0000 40
    NSDSDFEX       0003 80
    NSDSDFNO       0003 20
    NSDSSP         0000 80
    NSDSSPCL       0001 20
    NSDSSPOR       0002 20
    NSDSSPPU       0001 10
    NSDSTAFG       0002

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 17:03:00 EDT.
Copyright IBM Corporation, 1990, 2002