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

#### SNTBK

Prolog

Control Block Contents
SNTBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### SNTBK Prolog

     NAME       : HCPSNTBK
     DESCRIPTION: System Name Table Block
     COPYRIGHT -
                  THIS MODULE IS "RESTRICTED MATERIALS OF IBM"
                  5654-A17 (C) COPYRIGHT IBM CORP. - 1985, 2001
                  LICENSED MATERIALS - PROPERTY OF IBM
     DSECT      : SNTBK
     FUNCTION   : This block is used to keep track of a system data
                  file that is brought into the system.
     LOCATED BY : The pointer to this chain of blocks is located in
                  HCPNSU, using NSUNSYAN for NSSs, NSUNSGAN for
                  DCSSs, NSUIMGAN for images, and NSUNLSAN for
                  NLS files.
                  - In HCPSHRBK, pointer SHRSNTPT will point to the
                  associated HCPSNTBK.
                  Pointer SHRLSSA will point to the segment space
                  through which the shared segment was loaded.
                  - In HCPPGMBK, using the PGMVM pointer will point to the
                  associated HCPSNTBK.
                  - SNTFWDPT will point to the next HCPSNTBK in the chain.
                  - The end of chain is located when the SNTFWDPT equals
                  the address of NSUNSYAN, NSUNSGAN OR NSUIMGAN.
                  - In HCPIMGBK, IMGSNTBK will point to the
                  associated HCPSNTBK.
     CREATED BY : HCPNSL when loading the NSS or DCSS for the first
                  time.
                  - HCPNSD will build this block for the duration of the
                  processing of the DEFSEG and DEFSYS commands.
                  - HCPNSS will build this block for the duration of the
                  processing of the SAVESEG and SAVESYS commands.
                  - HCPNSI will build this block for the duration
                  of processing of the diagnose X'74' instruction
                  to save or load an image, and the diagnose
                  X'CC' instruction to create an NLS message
                  repository.
                  - HCPNSR will build this block when opening an
                  image library or NLS message repository file.
     DELETED BY : HCPNSP will delete this block when the count fields
                  of an NSS or DCSS go to zero. The fields are
                  SNTUSRSH and SNTUSREX.
                  - HCPNSD will delete this block after processing
                  the DEFSEG or DEFSYS command.
                  - HCPNSS will delete this block after processing the
                  SAVESEG or SAVESYS command.
                  - HCPNSI will delete this block after processing
                  diagnose X'74' to save or load an image, or
                  diagnose X'CC' to create an NLS message
                  repository.
                  - HCPNSR will delete this block when closing the
                  image library or NLS message repository.
     COMMENTS   :
                  - The size of this block is 4K, a page of storage.
                  - *****NOTE***** This control block maps the
                  descriptor page for certain system data files.
                  Extreme care must be exercised when updating this
                  block, to avoid causing files created prior to
                  the update to break. Changes must be made in an
                  upward-compatible way

#### SNTBK Control Block Content

#### SNTBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SNTBK          System Name Table Block
    0000    0 Dbl-Word     8 SNTASM0 (128)  GENERAL INFORMATION
    0400 1024 Dbl-Word     8 SNTASM1 (128)  Reserved
    0800 2048 Dbl-Word     8 SNTASM2 (128)  Page range information
    0C00 3072 Dbl-Word     8 SNTASM3 (128)  Image library specific
                                            information
    0000    0 Address      4 SNTFWDPT       Forward pointer to the next
                                            SNTBK.
    0004    4 Address      4 SNTBCKPT       Backward pointer to the next
                                            SNTBK.
         The following is used to move the following fields in HCPNSBWD:
         SNTNAME, SNTFLAGS
    0008    8 Character   12 SNTNAMFL (0)   This field used to move the
                                            following two fields.
    0008    8 Character    8 SNTNAME        Name of the NSS, DCSS, image, or
                                            NLS.
    0010   16 Signed       4 SNTFLAGS (0)   Flags for the SNTBK.
    0010   16 Bitstring    1 SNTTYPFG       Type information flag.
              1... ....      SNTRSTD        X'80' Indicates that this NSS or
                                            DCSS has restricted use and must
                                            have a NAMESAVE entry in the
                                            user's directory.
              .1.. ....      SNTCPUSE       X'40' Indicates that this is a CP
                                            NSS/DCSS - meaning CP will write
                                            to the parts of this NSS/DCSS
                                            with ranges defined as 'SC'.
              ..1. ....      SNTLSS         X'20' This bit indicates that
                                            this is a segment space
                                            definition that contains member
                                            saved segments.
              ...1 ....      SNTMSS         X'10' This bit indicates that
                                            this is a member saved segment
                                            definition. NOTES : If both
                                            SNTLSS and SNTMSS are off then
                                            this is a named saved segment.
              .... 1...      SNTNLS         X'08' This is an NLS.
              .... .1..      SNTIMG         X'04' This is an Image.
              .... ..1.      SNTSYS         X'02' This is an NSS.
              .... ...1      SNTSEG         X'01' This is a DCSS.
              1... ....      SNTRSTD        X'80' Indicates that this NSS or
                                            DCSS has restricted use and must
                                            have a NAMESAVE entry in the
                                            user's directory.
              .1.. ....      SNTCPUSE       X'40' Indicates that this is a CP
                                            NSS/DCSS - meaning CP will write
                                            to the parts of this NSS/DCSS
                                            with ranges defined as 'SC'.
              ..1. ....      SNTLSS         X'20' This bit indicates that
                                            this is a segment space
                                            definition that contains member
                                            saved segments.
              ...1 ....      SNTMSS         X'10' This bit indicates that
                                            this is a member saved segment
                                            definition. NOTES : If both
                                            SNTLSS and SNTMSS are off then
                                            this is a named saved segment.
              .... 1...      SNTNLS         X'08' This is an NLS.
              .... .1..      SNTIMG         X'04' This is an Image.
              .... ..1.      SNTSYS         X'02' This is an NSS.
              .... ...1      SNTSEG         X'01' This is a DCSS.
    0011   17 Bitstring    1 SNTSTAFG       Status information flag.
              .... .1..      SNTABEND       X'04' This bit indicates that an
                                            abend should be issued when the
                                            Auxiliary Storage Manager or Real
                                            Storage Manager in use counts are
                                            not the same.
              .... ...1      SNTPENDP       X'01' This bit indicates that the
                                            NSS, DCSS, image, or NLS file
                                            should be purged when the total
                                            user count goes to zero.
              1... ....      SNTNOTLD       X'80' This bit indicates that
                                            SPTape is dumping this NSS or
                                            DCSS and it is not a loadable
                                            system/space. FIND, LOAD and IPL
                                            use this bit to determine whether
                                            the Guest should be deferred or
                                            not.
         The following are the flags that indicate status.
         The field below, SNTENVFG, is kept in this block for compatibility
         only. It has been superceded by SNTMENVF. The values in this field
         should not be used in code other than the compatibility code currently
         referencing it.
         This field is defined to contain the virtual machine mode in which the
         NSS was saved. It therefore can have only one value.
         The field that supercedes this one, SNTMENVF, was defined as indicating
         which virtual machine modes were specified on the DEFSYS command. It
         now is defined as indicating in which mode(s) the NSS can be IPLed.
    0012   18 Bitstring    1 SNTENVFG       Flag information byte
              00000001       SNT370MD       X'01' This bit indicates 370 mode
                                            machine.
              00000002       SNTESAMD       X'02' This bit indicates ESA-370
                                            mode machine.
              00000004       SNTXCMD        X'04' This bit indicates an
                                            ESA/XC mode machine
    0013   19 Bitstring    1 SNTTYPF2       Type information byte 2.
              1... ....      SNTSHWRT       X'80' Indicates that there at
                                            least one shared writeable page
                                            range (SW or SN).
              .1.. ....      SNTVMGRP       X'40' Indicates that a VMGROUP
                                            attribute is assigned to this
                                            NSS.
              ..1. ....      SNTLNSHR       X'20' Indicates that any user is
                                            allowed to load an exclusive
                                            version of this saved segment.
                                            Note that this bit is only valid
                                            for DCSS and segment space
                                            SNTBKs.
         To update the SNTUSRSH or SNTUSREX count for NSSs or saved segments the
         SNTBK-SHRBK Queue lock (SNTSHRLK) must be held exclusively.
    0014   20 Signed       2 SNTUSRSH       Count of NSS or DCSS users in
                                            shared mode or count of all users
                                            of an image library.
    0016   22 Signed       2 SNTUSREX       Count of NSS or DCSS users in
                                            exclusive mode. NOTES : SNTUSRSH
                                            + SNTUSREX = The number of loads
                                            of this name. This is the number
                                            of SHRBKs on this SNTBK's SHRBK
                                            chain.
    0018   24 Address      4 SNTSTLPT       Pointer to the STLBK. It contains
                                            PGMBK info
    001C   28 Address      4 SNTSDFBK       Pointer to the SDFBK. Used to
                                            communicate with the SDF system.
    0020   32 Signed       4 *              Reserved for IBM use.
         The following field SNTCOUNT is used to allow a move of the following
         fields in HCPNSBWD: SNTMINSZ, SNTRNGCT, SNTDESCT, SNTENVCT, SNTKEYCT,
         SNTSTRCT, SNTNDTCT, SNTPRFLG, Reserved byte, SNTPREGS
    0024   36 Character   32 SNTCOUNT (0)
    0024   36 Signed       4 SNTMINSZ       Indicates the minimum size in
                                            which the NSS can be IPLed.
    0028   40 Signed       4 SNTRNGCT       Count of valid page range entries
                                            for an NSS or DCSS.
    002C   44 Signed       4 SNTDESCT       Count of descriptor pages defined
                                            for an NSS, DCSS, image, or NLS
                                            file.
    0030   48 Signed       4 SNTENVCT       Count of environment pages for an
                                            NSS.
    0034   52 Signed       4 SNTKEYCT       Count of key pages for an NSS or
                                            DCSS.
    0038   56 Signed       4 SNTSTRCT       Count of storage pages saved for
                                            an NSS, DCSS, image, or NLS file.
    003C   60 Signed       4 SNTNDTCT       Count of storage pages defined
                                            with the no-data-saved attribute.
                                            This count is not calculated
                                            until the NSS or DCSS is saved.
                                            The total number of pages defined
                                            is SNTSTRCT+SNTNDTCT
    0040   64 Bitstring    1 SNTPRFLG       PARMREGS flags
              1... ....      SNTPRDEF       X'80' PARMREGS OPTION SPECIFIED
                                            ON DEFSYS
              .1.. ....      SNTPRNO        X'40' PARMREGS=NONE SPECIFIED ON
                                            DEFSYS
              1... ....      SNTPRDEF       X'80' PARMREGS OPTION SPECIFIED
                                            ON DEFSYS
              .1.. ....      SNTPRNO        X'40' PARMREGS=NONE SPECIFIED ON
                                            DEFSYS
    0041   65 Bitstring    1 *              Reserved for IBM use
    0042   66 Bitstring    2 SNTPREGS (0)   PARMREGS registers
    0042   66 Signed       1 SNTPRBEG       PARMREGS beginning register
    0043   67 Signed       1 SNTPREND       PARMREGS ending register
    0044   68 Address      4 SNTSHRPT       Forward anchor for SHRBK chain.
    0048   72 Address      4 SNTCPNTE       CP Notification Address - this
                                            address will be called each time
                                            a virtual machine releases the
                                            system data file.
         The following is used to move the following fields in HCPNSBWD:
         SNTMEMCT, Reserved field, SNTSTPAG, SNTENPAG
    004C   76 Character   12 SNTMEMSR (0)
    004C   76 Signed       2 SNTMEMCT       Count of member saved segments
                                            within this segment space. This
                                            field is only valid if SNTLSS is
                                            on. This field indicates the
                                            number of member saved segment
                                            directory entries located in the
                                            directory area (SNTASM2 &
                                            SNTASM3). It may not be larger
                                            than SNTMAXCT.
    004E   78 Signed       2 *              Reserved for IBM use
    0050   80 Signed       4 SNTSTPAG       The lowest page defined for this
                                            segment. This page number has not
                                            been rounded down to the nearest
                                            megabyte boundary for segment
                                            spaces.
    0054   84 Signed       4 SNTENPAG       The highest page defined for this
                                            segment. This page number has not
                                            been rounded up to the nearest
                                            megabyte boundary for segment
                                            spaces.
         To update the SNTLODCT count for NSSs or saved segments the SNTBK-SHRBK
         Queue lock (SNTSHRLK) must be held exclusively.
    0058   88 Signed       4 SNTLODCT       The number of loads via this
                                            segment space. This is the number
                                            of SHRBKs that point to this
                                            segment space. This count is only
                                            valid if SNTLSS is on.
              00000040       SNTMAXCT       64 The maximum number of members
                                            in a segment space and the
                                            maximum number of segment space
                                            that may be associated with a
                                            member saved segment.
    005C   92 Address      4 SNTCPNTL       CP Notification Address - this
                                            address will be called when the
                                            last virtual machine releases the
                                            system data file.
    0060   96 Address      4 SNTNOTAM       CP Notification Address - this
                                            address will be called when a
                                            saved segment is purged.
    0064  100 Signed       4 *              Reserved for IBM use.
    0068  104 Bitstring    1 SNTMENVF       Flag used to indicate the virtual
                                            machine environments in which the
                                            NSS can be IPLed.
              1... ....      SNTMULT        X'80' This NSS can be IPLed in
                                            more than one virtual machine
                                            mode.
              .... .1..      SNTXCMM        X'04' This bit indicates the
                                            ESA/XC virtual machine can IPL
                                            this NSS.
              .... ..1.      SNTESAMM       X'02' This bit indicates the
                                            ESA-370 virtual machine can IPL
                                            this NSS.
              .... ...1      SNT370MM       X'01' This bit indicates the
                                            System/370 virtual machine can
                                            IPL this NSS.
    0069  105 Bitstring    1 * (7)          Reserved for IBM use.
         SNTBK/SHRBK queue lock (SNTSHRLK)
         Lock type: This is a formal shared or exclusive lock
         Resource serialized: This lock manages the SHRBK queue chained from the
         SNTBK. The lock will be obtained shared when scanning the queue and
         exclusive when adding to, or deleting from, the queue. This lock is
         also used to serialize the following SNTBK 'use-counts': SNTUSRSH,
         SNTUSREX, SNTLODCT. The lock must be obtained exclusive when updating
         these counts.
         Notes : If the Saved Segment SNTBK queue or Named Saved System SNTBK
         queue lock is held exclusively then the SNTBK/SHRBK lock does not need
         to be obtained to add/ remove a SHRBK or increment/decrement the
         'use-counts'.
         See the general comments in HCPNSUBK COPY file for detailed Saved
         Segment or NSS locking information.
    0070  112 Dbl-Word     8 SNTSHRLK (3)   SNTBK/SHRBK queue defer lock
    0088  136 Dbl-Word     8 SNTPURID       User id who issued PURGE command
                                            while SAVESEG/SAVESYS command is
                                            processing.
    0090  144 Address      4 SNTCPEBK       Queue of CPEBKs waiting to load
                                            this NSS or DCSS while SPTape is
                                            dumping it.
    0094  148 Address      4 SNTXBLBK       Address of XBLBK for NSSs
    0098  152 Address      4 SNTENVPG       Address of environment page. This
                                            is a System Virtual address.
    009C  156 Address      4 SNTASCBK       Address of ASCBK for this space
    00A0  160 Bitstring    4 SNTTODLD       TOD(0-31) when image was loaded
    00A4  164 Bitstring    4 *              Reserved
    00A8  168 Character    8 SNTMARKR       Eye-catcher
                                            C'>>SNT<<<'
    004C   76 Signed       2 SNTLOGCT       Count of segment spaces
                                            containing this member save
                                            segment. This field is only valid
                                            if SNTMSS is on. This field
                                            indicates the number of segment
                                            space directory entries located
                                            in the directory area (SNTASM3).
                                            It may not be larger than
                                            SNTMAXCT.
    0800 2048 Dbl-Word     8 SNTRANGE       A pair of start/end page ranges.
              1... ....      SNTPRMAX       128 The maximum number of page
                                            range entries plus one entry for
                                            the fence for NSSs and DCSSs.
                                            Images have only one page range.
    0800 2048 Signed       4 SNTRANS        First page of range. This field
                                            for NSSs and DCSSs will contain a
                                            flag in the rightmost byte.
    0804 2052 Signed       4 SNTRANE        Last page of range.
    0800 2048 Bitstring    3 SNTRSNOF       The start page range minus the
                                            flag byte. The page range will be
                                            in the form SSSPP0FF, where SSS =
                                            segment number PP = page number 0
                                            = always 0 FF = flag byte
    0803 2051 Bitstring    1 SNTRNGFG       Page range storage type flag for
                                            NSSs and DCSSs.
              .... ...1      SNTEXCL        X'01' This bit indicates segments
                                            that may not be shared among
                                            several users. Each user gets a
                                            separate copy of this segment.
              .... ..1.      SNTPROT        X'02' This bit indicates page
                                            ranges that are page protected.
                                            Users may access these pages only
                                            in read-only mode.
              .... .1..      SNTNDAT        X'04' This bit indicates page
                                            ranges whose data is not saved
                                            into the SDF (no data). How page
                                            descriptor codes correspond to
                                            settings of SNTRNGFG: noformat
                                            CODE SNTRNGFG SNTNDAT SNTPROT
                                            SNTEXCL SW 000 0=data
                                            0=unprotected (read/write)
                                            0=shared EW 001 0=data
                                            0=unprotected (read/write)
                                            1=exclusive SR 010 0=data
                                            1=protected (read-only) 0=shared
                                            ER 011 0=data 1=protected
                                            (read-only) 1=exclusive SN 100
                                            1=nodata 0=unprotected
                                            (read/write) 0=shared EN 101
                                            1=nodata 0=unprotected
                                            (read/write) 1=exclusive SC 110
                                            1=nodata 1=protected (read-only)
                                            0-shared 111 (reserved) enoformat
              .... ....      SNTRNGSW       0 Range flag value for 'SW'
              .... ...1      SNTRNGEW       SNTEXCL Range flag value for 'EW'
              .... ..1.      SNTRNGSR       SNTPROT Range flag value for 'SR'
              .... ..11      SNTRNGER       SNTPROT+SNTEXCL Range flag value
                                            for 'ER'
              .... .1..      SNTRNGSN       SNTNDAT Range flag value for 'SN'
              .... .1.1      SNTRNGEN       SNTNDAT+SNTEXCL Range flag value
                                            for 'EN'
              .... .11.      SNTRNGSC       SNTNDAT+SNTPROT Range flag value
                                            for 'SC'
              .... .111      SNTRNGR2       SNTNDAT+SNTPROT+SNTEXCL Reserved
    0800 2048 Character   32 SNTMEMBR       Member entry
         The following is used to move the following fields in HCPNSBWD:
         SNTMSSNM, SNTMEMST, SNTMEMEN
    0800 2048 Character   16 SNTMEMDA (0)   THIS ALLOWS THE MOVE OF THE NEXT
                                            3 FIELDS
    0800 2048 Character    8 SNTMSSNM       Name of the member saved segment
    0808 2056 Signed       4 SNTMEMST       First page of range. This field
                                            will contain status information
                                            in the rightmost byte. The page
                                            number will be in form:
                        SSSPP0FF, where SSS = segment number
                                        PP  = page number
                                        0   = always 0
                                        FF  = status byte
    080C 2060 Signed       4 SNTMEMEN       Last page of range
    0810 2064 Address      4 SNTMSSA        Address of the SNTBK defining the
                                            member saved segment.
    0814 2068 Signed       4 *              Reserved for IBM use
    0818 2072 Dbl-Word     8 *              Reserved for IBM use
              00000020       SNTNTSZM       *-SNTMSSNM Length of a member
                                            saved seg entry
    0808 2056 Bitstring    3 SNTMEMSP       Starting page number for the
                                            member
    080B 2059 Bitstring    1 SNTMSTAT       Member saved segment status byte
              .... .1..      SNTMQNTF       X'04' Flag to indicate this entry
                                            not found during QUERY NAMES
                                            command processing
              .... ..1.      SNTMSAVD       X'02' This member saved segment
                                            has been saved
              .... ...1      SNTMPENP       X'01' This member saved segment
                                            is in pending purge status.
    0C00 3072 Character   16 SNTLGSEG       Segment Space Entry
    0C00 3072 Character    8 SNTLSSNM       Name of the segment space
    0C08 3080 Address      4 SNTLSSA        Address of the segment space's
                                            SNTBK. This field is zero if the
                                            segment SPACE IS NOT BEING USED.
                                            WARNING - THIS FIELD MAY BE
                                            INACCURATE UNDER CERTAIN
                                            CIRCUMSTANCES (LIKE SNTBKS OF
                                            MEMBERS THAT WERE DEFINED USING
                                            THE 'SAME' OPTION) IT IS
                                            RECOMMENDED THAT THE SEGMENT
                                            SPACE BE LOCATED THROUGH SHRLSSA
                                            AND COMPARES BE DONE ON THE SNTBK
                                            NAMES, NOT WITH THIS ADDRESS.
    0C0C 3084 Bitstring    1 SNTLSTAT       Segment space status byte
              .... .1..      SNTLQNTF       X'04' Flag to indicate this entry
                                            not found during QUERY NAMES
                                            command processing.
              .... ..1.      SNTLOPEN       X'02' Segment space found open
                                            don't compress.
              .... ...1      SNTLPENP       X'01' This segment space is in
                                            pending purge status.
    0C0D 3085 Bitstring    3 SNTLSSCT       NUMBER OF SEGMENT SPACE SNTBKS BY
                                            THIS NAME POINTING TO THIS MEMBER
                                            SNTBK NOTE 3 BYTES ARE ENOUGH AS
                                            EACH SNTBK OCCUPIES A FULL PAGE
                                            AND WE CAN NEVER HAVE X'FFFFFF'
                                            SNTBKS
              00000010       SNTNTSZL       *-SNTLSSNM The size of a segment
                                            space directory entry.
              0000000A       SNTAPMAX       10 The maximum number of address
                                            entries in this ASA/virtual
                                            address table for an image or NLS
                                            file.
    0C00 3072 Address      4 SNTASALT       Address of the next page in the
                                            ASA/virtual address table. This
                                            field applies only to image and
                                            NLS files.
              00000C04       SNTNASA        * Next ASA in the table for image
                                            files.

#### SNTBK Storage Layout

    *** SNTBK - System Name Table Block
    *
    *     +-------------------------------------------------------+
    *   0 |                                                       |
    *     =                       SNTASM0                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 400 |                                                       |
    *     =                       SNTASM1                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 800 |                                                       |
    *     =                       SNTASM2                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * C00 |                                                       |
    *     =                       SNTASM3                         =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *1000
    *
    *** SNTBK - System Name Table Block

    *** Overlay for SNTASM0 in SNTBK
    *
    *     +---------------------------+---------------------------+
    *   0 |         SNTFWDPT          |         SNTBCKPT          |
    *     +---------------------------+---------------------------+
    *   8 |                       SNTNAME                         |
    *     +------+------+------+------+-------------+-------------+
    *  10 |:TYPFG|:STAFG|:ENVFG|:TYPF2|  SNTUSRSH   |  SNTUSREX   |
    *     +------+------+------+------+-------------+-------------+
    *  18 |         SNTSTLPT          |         SNTSDFBK          |
    *     +---------------------------+---------------------------+
    *  20 |///////////////////////////|         SNTMINSZ          |
    *     +---------------------------+---------------------------+
    *  28 |         SNTRNGCT          |         SNTDESCT          |
    *     +---------------------------+---------------------------+
    *  30 |         SNTENVCT          |         SNTKEYCT          |
    *     +---------------------------+---------------------------+
    *  38 |         SNTSTRCT          |         SNTNDTCT          |
    *     +------+------+------+------+---------------------------+
    *  40 |:PRFLG|//////|:PRBEG|:PREND|         SNTSHRPT          |
    *     +------+------+------+------+-------------+-------------+
    *  48 |         SNTCPNTE          |  SNTMEMCT   |/////////////|
    *     +---------------------------+-------------+-------------+
    *  50 |         SNTSTPAG          |         SNTENPAG          |
    *     +---------------------------+---------------------------+
    *  58 |         SNTLODCT          |         SNTCPNTL          |
    *     +---------------------------+---------------------------+
    *  60 |         SNTNOTAM          |///////////////////////////|
    *     +------+--------------------+---------------------------+
    *  68 |:MENVF|////////////////////////////////////////////////|
    *     +------+------------------------------------------------+
    *  70 |                                                       |
    *     =                       SNTSHRLK                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  88 |                       SNTPURID                        |
    *     +---------------------------+---------------------------+
    *  90 |         SNTCPEBK          |         SNTXBLBK          |
    *     +---------------------------+---------------------------+
    *  98 |         SNTENVPG          |         SNTASCBK          |
    *     +---------------------------+---------------------------+
    *  A0 |         SNTTODLD          |///////////////////////////|
    *     +---------------------------+---------------------------+
    *  A8 |                       SNTMARKR                        |
    *     +-------------------------------------------------------+
    *  B0
    *
    *** Overlay for SNTASM0 in SNTBK

    *** Overlay for SNTMEMCT in SNTBK
    *
    *                                 +-------------+
    *  48 ...                      4C |  SNTLOGCT   | 4E
    *                                 +-------------+
    *
    *** Overlay for SNTMEMCT in SNTBK

    *** Overlay for SNTASM2 in SNTBK
    *
    *     +-------------------------------------------------------+
    * 800 |                       SNTRANGE                        |
    *     +-------------------------------------------------------+
    * 808
    *
    *** Overlay for SNTASM2 in SNTBK

    *** Overlay for SNTRANGE in SNTBK
    *
    *     +---------------------------+---------------------------+
    * 800 |         SNTRANS           |         SNTRANE           |
    *     +---------------------------+---------------------------+
    * 808
    *
    *** Overlay for SNTRANGE in SNTBK

    *** Overlay for SNTRANS in SNTBK
    *
    *     +--------------------+------+
    * 800 |     SNTRSNOF       |:RNGFG| 804
    *     +--------------------+------+
    *
    *** Overlay for SNTRANS in SNTBK

    *** Overlay for SNTASM2 in SNTBK
    *
    *     +-------------------------------------------------------+
    * 800 |                                                       |
    *     =                       SNTMEMBR                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 820
    *
    *** Overlay for SNTASM2 in SNTBK

    *** Overlay for SNTMEMBR in SNTBK
    *
    *     +-------------------------------------------------------+
    * 800 |                       SNTMSSNM                        |
    *     +---------------------------+---------------------------+
    * 808 |         SNTMEMST          |         SNTMEMEN          |
    *     +---------------------------+---------------------------+
    * 810 |         SNTMSSA           |///////////////////////////|
    *     +---------------------------+---------------------------+
    * 818 |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    * 820
    *
    *** Overlay for SNTMEMBR in SNTBK

    *** Overlay for SNTMEMST in SNTBK
    *
    *     +--------------------+------+
    * 808 |     SNTMEMSP       |:MSTAT| 80C
    *     +--------------------+------+
    *
    *** Overlay for SNTMEMST in SNTBK

    *** Overlay for SNTASM3 in SNTBK
    *
    *     +-------------------------------------------------------+
    * C00 |                       SNTLGSEG                        |
    *     |                                                       |
    *     +-------------------------------------------------------+
    * C10
    *
    *** Overlay for SNTASM3 in SNTBK

    *** Overlay for SNTLGSEG in SNTBK
    *
    *     +-------------------------------------------------------+
    * C00 |                       SNTLSSNM                        |
    *     +---------------------------+------+--------------------+
    * C08 |         SNTLSSA           |:LSTAT|     SNTLSSCT       |
    *     +---------------------------+------+--------------------+
    * C10
    *
    *** Overlay for SNTLGSEG in SNTBK

    *** Overlay for SNTASM3 in SNTBK
    *
    *     +---------------------------+
    * C00 |         SNTASALT          | C04
    *     +---------------------------+
    *
    *** Overlay for SNTASM3 in SNTBK

#### SNTBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    SNTABEND       0011 04
    SNTAPMAX       0C0D 0000000A
    SNTASALT       0C00
    SNTASCBK       009C
    SNTASM0        0000
    SNTASM1        0400
    SNTASM2        0800
    SNTASM3        0C00
    SNTBCKPT       0004
    SNTCOUNT       0024
    SNTCPEBK       0090
    SNTCPNTE       0048
    SNTCPNTL       005C
    SNTCPUSE       0010 40
    SNTCPUSE       0010 40
    SNTDESCT       002C
    SNTENPAG       0054
    SNTENVCT       0030
    SNTENVFG       0012
    SNTENVPG       0098
    SNTESAMD       0012 00000002
    SNTESAMM       0068 02
    SNTEXCL        0803 01
    SNTFLAGS       0010
    SNTFWDPT       0000
    SNTIMG         0010 04
    SNTIMG         0010 04
    SNTKEYCT       0034
    SNTLGSEG       0C00
    SNTLNSHR       0013 20
    SNTLODCT       0058
    SNTLOGCT       004C
    SNTLOPEN       0C0C 02
    SNTLPENP       0C0C 01
    SNTLQNTF       0C0C 04
    SNTLSS         0010 20
    SNTLSS         0010 20
    SNTLSSA        0C08
    SNTLSSCT       0C0D
    SNTLSSNM       0C00
    SNTLSTAT       0C0C
    SNTMARKR       00A8
    SNTMAXCT       0058 00000040
    SNTMEMBR       0800
    SNTMEMCT       004C
    SNTMEMDA       0800
    SNTMEMEN       080C
    SNTMEMSP       0808
    SNTMEMSR       004C
    SNTMEMST       0808
    SNTMENVF       0068
    SNTMINSZ       0024
    SNTMPENP       080B 01
    SNTMQNTF       080B 04
    SNTMSAVD       080B 02
    SNTMSS         0010 10
    SNTMSS         0010 10
    SNTMSSA        0810
    SNTMSSNM       0800
    SNTMSTAT       080B
    SNTMULT        0068 80
    SNTNAME        0008
    SNTNAMFL       0008
    SNTNASA        0C00 00000C04
    SNTNDAT        0803 04
    SNTNDTCT       003C
    SNTNLS         0010 08
    SNTNLS         0010 08
    SNTNOTAM       0060
    SNTNOTLD       0011 80
    SNTNTSZL       0C0D 00000010
    SNTNTSZM       0818 00000020
    SNTPENDP       0011 01
    SNTPRBEG       0042
    SNTPRDEF       0040 80
    SNTPRDEF       0040 80
    SNTPREGS       0042
    SNTPREND       0043
    SNTPRFLG       0040
    SNTPRMAX       0800 80
    SNTPRNO        0040 40
    SNTPRNO        0040 40
    SNTPROT        0803 02
    SNTPURID       0088
    SNTRANE        0804
    SNTRANGE       0800
    SNTRANS        0800
    SNTRNGCT       0028
    SNTRNGEN       0803 05
    SNTRNGER       0803 03
    SNTRNGEW       0803 01
    SNTRNGFG       0803
    SNTRNGR2       0803 07
    SNTRNGSC       0803 06
    SNTRNGSN       0803 04
    SNTRNGSR       0803 02
    SNTRNGSW       0803 00
    SNTRSNOF       0800
    SNTRSTD        0010 80
    SNTRSTD        0010 80
    SNTSDFBK       001C
    SNTSEG         0010 01
    SNTSEG         0010 01
    SNTSHRLK       0070
    SNTSHRPT       0044
    SNTSHWRT       0013 80
    SNTSTAFG       0011
    SNTSTLPT       0018
    SNTSTPAG       0050
    SNTSTRCT       0038
    SNTSYS         0010 02
    SNTSYS         0010 02
    SNTTODLD       00A0
    SNTTYPFG       0010
    SNTTYPF2       0013
    SNTUSREX       0016
    SNTUSRSH       0014
    SNTVMGRP       0013 40
    SNTXBLBK       0094
    SNTXCMD        0012 00000004
    SNTXCMM        0068 04
    SNT370MD       0012 00000001
    SNT370MM       0068 01

This information is based on z/VM V4R3.0. Last updated on 30 Apr 2002 at 17:40:34 EDT.
Copyright IBM Corporation, 1990, 2002