NSDBK | Back to Index page

| Prolog Control Block Contents NSDBK 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.

NSDBK Prolog | Top of page

     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
     RELOCATION CONSIDERATIONS : None

NSDBK Control Block Content | Top of page

     NSDBK DSECT
    Top of page

    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' NSDMINSZ If on, indicates
                                            MINSIZE operand was specified.
              ..1. ....      NSDPREGS       X'20' NSDPREGS If on, indicates
                                            PARMREGS operand was already
                                            specified
              .1.. ....      NSDSAMER       X'40' NSDSAMER If on, indicates
                                            that SAMErange operand was
                                            already specified
              1... ....      NSDSSP         X'80' NSDSSP If on, indicates
                                            that the SPACE operand was
                                            already specified
    0001    1 Bitstring    1 NSDERRFG       Error flag
              1... ....      NSDMSSCL       X'80' NSDMSSCL Indicate that the
                                            MSS (R8) SDFBK is to be closed
              .1.. ....      NSDMSSPU       X'40' NSDMSSPU Indicate that the
                                            MSS (R9) SDFBK is to be purged
              ..1. ....      NSDSSPCL       X'20' NSDSSPCL Indicate that the
                                            SSP (R8) SDFBK is to be closed
              ...1 ....      NSDSSPPU       X'10' NSDSSPPU Indicate that the
                                            SSP (R8) SDFBK is to be purged
              .... 1...      NSDNOMSG       X'08' NSDNOMSG Indicates to exit
                                            without sending a message
    0002    2 Bitstring    1 NSDSTAFG       Status flag
              1... ....      NSDMSSOR       X'80' NSDMSSOR Indicates that the
                                            member was found opened for reads
              .1.. ....      NSDNEWSP       X'40' NSDNEWSP Indicates a new
                                            SSP created. No need to return
                                            frame from the call to HCPNSCFA.
              ..1. ....      NSDSSPOR       X'20' NSDSSPOR Indicates that the
                                            segment space was found opened
                                            for read
    0003    3 Bitstring    1 NSDLCKFG       *NSS SDF queue lock status
              1... ....      NSDSDFEX       X'80' NSDSDFEX Indicates that the
                                            *NSS SDF queue lock is held
                                            exclusively
              ..1. ....      NSDSDFNO       X'20' NSDSDFNO 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 | Top of page

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

NSDBK Cross Reference | Top of page

    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 7.2.0 Last updated on 24 Jun 2020 at 09:29:24 EDT.
Copyright IBM Corporation, 1990, 2020