SNTBK Back to Index page
 
Prolog 
Control Block Contents 
   SNTBK 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.


  SNTBK Prolog Top of page
 
 NAME       : HCPSNTBK
 DESCRIPTION: System Name Table Block
 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.
 RELOCATION CONSIDERATIONS : None
 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
              - Two formats (31-bit and 64-bit) of the SNTBK are
              defined here.  The 31-bit format is an old format
              that exists only on spool for a below-2G NSS,
              DCSS, NLS, or IMG. When a 31-bit format SNTBK is
              read-in it is converted to 64-bit format by
              HCPNSBTG. Similarly, when a below-2G file is
              written out, HCPNSBGT converts it from 64-bit
              format to 31-bit format before the write is done.
              All in-storage accesses of the SNTBK block by CP
              are done using the 64-bit format. When converting
              between the 31-bit and 64-bit formats, HCPNSB
              uses only a subset of the original 31-bit field
              names (specifically those defined at the
              higher-level encapsulating several smaller
              fields). As a result, some of the 31-bit field
              names are no longer referenced by CP and have
              been "removed" or "reserved" as indicated in the
              list below.  See PITS 2U00987 for more details.
              Reserved --> points to labels that have been
              removed, but their corresponding DS statements
              are still used as "Reserved" declarations to
              preserve SNTBK offsets.
              Removed --> points to labels and EQUates that
              have been completely removed, for doing so
              does not disrupt SNTBK offsets.
              31-bit format      64-bit format
              SNTMEMSR(3-word)   SNTMSRG(5-word)
              SNTSTPAG(32-bit)   SNTSTPGG(64-bit)_
              SNTENPAG(32-bit)   SNTENPGG(64-bit)
  eserved --> SNTLODCT(32-bit)   SNTLODCG(32-bit)
              SNTCPNTL(32-bit)   SNTCPNTG(32-bit)
              SNTNOTAM(32-bit)   SNTNOTAG(32-bit)
              SNTMENVF(1-byte)   SNTMENVG(1-byte)
              SNTRANGE(2-word)   SNTRANGG(4-word)
              SNTPRMAX(=128)     SNTPRMXG(=64)
              SNTRANS (32-bit)   SNTRANSG(64-bit)
              Removed --> SNTRSNOF(3-byte)   SNTRSNOG(7-byte)
              Removed --> SNTRNGFG(1-byte)   SNTRGFGG(1-byte)
              SNTRANE (32-bit)   SNTRANEG(64-bit)
              SNTMEMDA(4-word)   SNTMEMDG(6-word)
              SNTMSSNM(2-word)   SNTMSSNG(2-word)
              SNTMEMST(32-bit)   SNTMEMSG(64-bit)
              Removed --> SNTMEMSP(3-byte)   SNTMSPG (7-byte)
              Removed --> SNTMSTAT(1-byte)   SNTMSTAG(1-byte)
              SNTMSSA (32-bit)   SNTMSSAG(32-bit)
 
 
  SNTBK Control Block Content Top of page
 

 SNTBK DSECT Top of page
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 SNTBK/SHRBK queue lock (SNTSHRLK) 0400 1024 Dbl-Word 8 SNTASM1 (128) Reserved 0800 2048 Dbl-Word 8 SNTASM2 (128) Page Range Information Segment Space Member List 0C00 3072 Dbl-Word 8 SNTASM3 (128) Member's Segment Space List Variable list of ASAs for Image Files | | | SNTASM0 - General Information | | - SNTBK/SHRBK queue lock (SNTSHRLK) | | | 0000 0 Address 4 SNTFWDPT Forward pointer to the next SNTBK. 0004 4 Address 4 SNTBCKPT Backward pointer to the next SNTBK. 0008 8 Character 12 SNTNAMFL (0) This field used to move the following two fields in HCPNSBWD. 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' SNTRSTD Indicates that this NSS or DCSS has restricted use and must have a NAMESAVE entry in the user's directory. .1.. .... SNTCPUSE X'40' SNTCPUSE 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' SNTLSS This bit indicates that this is a segment space definition that contains member saved segments. ...1 .... SNTMSS X'10' SNTMSS 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' SNTNLS This is an NLS. .... .1.. SNTIMG X'04' SNTIMG This is an Image. .... ..1. SNTSYS X'02' SNTSYS This is an NSS. .... ...1 SNTSEG X'01' SNTSEG This is a DCSS. 1... .... SNTRSTD X'80' SNTRSTD Indicates that this NSS or DCSS has restricted use and must have a NAMESAVE entry in the user's directory. .1.. .... SNTCPUSE X'40' SNTCPUSE 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' SNTLSS This bit indicates that this is a segment space definition that contains member saved segments. ...1 .... SNTMSS X'10' SNTMSS 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' SNTNLS This is an NLS. .... .1.. SNTIMG X'04' SNTIMG This is an Image. .... ..1. SNTSYS X'02' SNTSYS This is an NSS. .... ...1 SNTSEG X'01' SNTSEG This is a DCSS. 0011 17 Bitstring 1 SNTSTAFG Status information flag. .... .1.. SNTABEND X'04' SNTABEND 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' SNTPENDP This bit indicates that the NSS, DCSS, image, or NLS file should be purged when the total user count goes to zero. 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 SNTMENVG. 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/SNTMENVG, 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' SNT370MD Indicates a 370 mode machine 00000002 SNTESAMD X'02' SNTESAMD Indicates an ESA-370 mode machine 00000004 SNTXCMD X'04' SNTXCMD Indicates an ESA/XC mode machine 0013 19 Bitstring 1 SNTTYPF2 Type information byte 2. 1... .... SNTSHWRT X'80' SNTSHWRT Indicates that there at least one shared writeable page range (SW or SN). .1.. .... SNTVMGRP X'40' SNTVMGRP Indicates that a VMGROUP attribute is assigned to this NSS. ..1. .... SNTLNSHR X'20' SNTLNSHR 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 4 SNTUSRSH Count of NSS or DCSS users in shared mode or count of all users of an image library. 0018 24 Signed 4 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. 001C 28 Address 4 SNTSTLPT Pointer to the STLBK. It contains PGMBK info 0020 32 Address 4 SNTSDFBK Pointer to the SDFBK. Used to communicate with the SDF system. 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' SNTPRDEF PARMREGS OPTION SPECIFIED ON DEFSYS .1.. .... SNTPRNO X'40' SNTPRNO PARMREGS=NONE SPECIFIED ON DEFSYS 1... .... SNTPRDEF X'80' SNTPRDEF PARMREGS OPTION SPECIFIED ON DEFSYS .1.. .... SNTPRNO X'40' SNTPRNO 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 definition of SNTMEMSR is for the 31-bit format 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. 0058 88 Signed 4 * Reserved for IBM use 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. 0069 105 Bitstring 1 * (7) Reserved for IBM use. Redefinition of SNTMEMSR for 64-bit format SNTBK SNTMSRG is used to move the following fields in HCPNSBWD: SNTMEMCT, Reserved field, SNTSTPGG, SNTENPGG 004C 76 Character 20 SNTMSRG (0) 004C 76 Signed 2 * SNTMEMCT 004E 78 Signed 2 * Reserved for IBM use 0050 80 Dbl-Word 8 SNTSTPGG Lowest page for this segment 0058 88 Dbl-Word 8 SNTENPGG Highest page for this segment To update the SNTLODCG count for NSSs or saved segments the SNTBK-SHRBK Queue lock (SNTSHRLK) must be held exclusively. 0060 96 Signed 4 SNTLODCG 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. 0064 100 Address 4 SNTCPNTG CP Notification Address - this address will be called when the last virtual machine releases the system data file 0068 104 Address 4 SNTNOTAG CP Notification Address - this address will be called when a saved segment is purged 006C 108 Bitstring 1 SNTMENVG Flag used to indicate the virtual machine environments in which the NSS can be IPLed 1... .... SNTMULT X'80' SNTMULT This NSS can be IPLed in more than one virtual machine mode. .... 1... SNTZMM X'08' SNTZMM This bit indicates the z-arch virtual machine can IPL this NSS. .... .1.. SNTXCMM X'04' SNTXCMM This bit indicates the ESA/XC virtual machine can IPL this NSS. .... ..1. SNTESAMM X'02' SNTESAMM This bit indicates the ESA-370 virtual machine can IPL this NSS. .... ...1 SNT370MM X'01' SNT370MM This bit indicates the System/370 virtual machine can IPL this NSS. 006D 109 Bitstring 1 * (3) Reserved for IBM use End of redefinitions for 64-bit format SNTBK 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, SNTLODCG. 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 * Reserved for IBM use 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 for IBM use 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. End of SNTASM0 | | | SNTASM2 - Page Range Information | | OR | | Segment Space Member List | | | Redefinition of SNTRANGE for 31-bit Page Range The page range will be in the form SSSPP0FF where SSS = segment number PP = page number 0 = always 0 FF = flag byte 0800 2048 Dbl-Word 8 SNTRANGE A pair of start/end page ranges. 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. Redefinitions for 64-bit Page Range The page range will be in the form RRRRRRRRSSSPP0FF where RRRRRRRR = region number SSS = segment number 0 = always 0 FF = flag byte 0800 2048 Bitstring 16 SNTRANGG A pair of start/end page ranges. .1.. .... SNTPRMXG 64 SNTPRMXG 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 Dbl-Word 8 SNTRANSG First page of range. This field for NSSs and DCSSs will contain a flag in the rightmost byte. 0808 2056 Dbl-Word 8 SNTRANEG Last page of range. 0800 2048 Bitstring 7 SNTRSNOG The start page range minus the flag byte. The page range will be in the form RRRRRRRRSSSPP0FF: where RRRRRRRR = region number SSS = segment number 0 = always 0 FF = flag byte 0807 2055 Bitstring 1 SNTRGFGG Page range storage type flag for NSSs and DCSSs. .... ...1 SNTEXCL X'01' SNTEXCL 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' SNTPROT This bit indicates page ranges that are page protected. Users may access these pages only in read-only mode. .... .1.. SNTNDAT X'04' SNTNDAT This bit indicates page ranges whose data is not saved into the SDF (no data). The following describes how page descriptor codes correspond to settings of SNTRGFGG. CODE SNTRGFGG 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) 00000000 SNTRNGSW 0 Range flag value for 'SW' 00000001 SNTRNGEW SNTEXCL Range flag value for 'EW' 00000002 SNTRNGSR SNTPROT Range flag value for 'SR' 00000003 SNTRNGER SNTPROT+SNTEXCL Range flag value for 'ER' 00000004 SNTRNGSN SNTNDAT Range flag value for 'SN' 00000005 SNTRNGEN SNTNDAT+SNTEXCL Range flag value for 'EN' 00000006 SNTRNGSC SNTNDAT+SNTPROT Range flag value for 'SC' 00000007 SNTRNGR2 SNTNDAT+SNTPROT+SNTEXCL Reserved End of redefinitions for 64-bit Page Range | | | Segment Space Member List | | | Individual Member Entry Notes : This is a list of entries that can overlay both SNTASM2 and SNTASM3. 0800 2048 Character 32 SNTMEMBR Member entry Redefinition of Member Entry (SNTMEMBR) for 31-bit format 0800 2048 Character 16 SNTMEMDA (0) Used to move the next three 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 Redefinition of Member Entry (SNTMEMBR) for 64-bit format 0800 2048 Character 24 SNTMEMDG (0) Used to move the next 3 fields in HCPNSBWD 0800 2048 Character 8 SNTMSSNG Name of the member saved segment 0808 2056 Dbl-Word 8 SNTMEMSG First page of range. This field will contain status information in the rightmost byte. The page number will be in form: RRRRRRRRSSSPP0FF: where RRRRRRRR = region number SSS = segment number PP = page number 0 = always 0 FF = status byte 0810 2064 Dbl-Word 8 SNTMEMEG Last page of range 0818 2072 Address 4 SNTMSSAG Address of the SNTBK defining the member saved segment. 081C 2076 Signed 4 * Reserved for IBM use 0808 2056 Bitstring 7 SNTMSPG Starting page number for the member 080F 2063 Bitstring 1 SNTMSTAG Member saved segment status byte. .... .1.. SNTMQNTF X'04' SNTMQNTF Flag to indicate this entry not found during QUERY NAMES command processing .... ..1. SNTMSAVD X'02' SNTMSAVD This member saved segment has been saved .... ...1 SNTMPENP X'01' SNTMPENP This member saved segment is in pending End of SNTASM2 | | | SNTASM3 - Member's Segment Space List | | - Variable list of ASAs for Image Files | | | 0C00 3072 Character 16 SNTLGSEG Segment Space Entry Individual 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 compared be done on the SNTBK names, not with this address. 0C0C 3084 Bitstring 1 SNTLSTAT Segment space status byte .... .1.. SNTLQNTF X'04' SNTLQNTF Flag to indicate this entry not found during QUERY NAMES command processing. .... ..1. SNTLOPEN X'02' SNTLOPEN Segment space found open don't compress. .... ...1 SNTLPENP X'01' SNTLPENP 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. End of Member's Segment Space List Variable list of ASAs for Image Files 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. End of Variable List of ASAs for Image Files End of SNTASM3
 
 
  SNTBK Storage Layout Top of page
 
          
*** 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          |
*     +------+------+------+------+---------------------------+
*  18 |         SNTUSREX          |         SNTSTLPT          |
*     +---------------------------+---------------------------+
*  20 |         SNTSDFBK          |         SNTMINSZ          |
*     +---------------------------+---------------------------+
*  28 |         SNTRNGCT          |         SNTDESCT          |
*     +---------------------------+---------------------------+
*  30 |         SNTENVCT          |         SNTKEYCT          |
*     +---------------------------+---------------------------+
*  38 |         SNTSTRCT          |         SNTNDTCT          |
*     +------+------+------+------+---------------------------+
*  40 |:PRFLG|//////|:PRBEG|:PREND|         SNTSHRPT          |
*     +------+------+------+------+-------------+-------------+
*  48 |         SNTCPNTE          |  SNTMEMCT   |/////////////|
*     +---------------------------+-------------+-------------+
*  50 |         SNTSTPAG          |         SNTENPAG          |
*     +---------------------------+---------------------------+
*  58 |///////////////////////////|         SNTCPNTL          |
*     +---------------------------+---------------------------+
*  60 |         SNTNOTAM          |///////////////////////////|
*     +------+--------------------+---------------------------+
*  68 |:MENVF|////////////////////////////////////////////////|
*     +------+------------------------------------------------+
*  70
*
*** Overlay for SNTASM0 in SNTBK
          
*** Overlay for SNTMEMSR in SNTBK
*
*                                 +-------------+-------------+
*  48 ...                      4C |/////////////|/////////////|
*                                 +-------------+-------------+
*  50
*
*** Overlay for SNTMEMSR in SNTBK
          
*** Overlay for SNTSTPAG in SNTBK
*
*     +-------------------------------------------------------+
*  50 |                       SNTSTPGG                        |
*     +-------------------------------------------------------+
*  58 |                       SNTENPGG                        |
*     +---------------------------+---------------------------+
*  60 |         SNTLODCG          |         SNTCPNTG          |
*     +---------------------------+------+--------------------+
*  68 |         SNTNOTAG          |:MENVG|////////////////////|
*     +---------------------------+------+--------------------+
*  70 |                                                       |
*     =                       SNTSHRLK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  88 |                       SNTPURID                        |
*     +---------------------------+---------------------------+
*  90 |///////////////////////////|         SNTXBLBK          |
*     +---------------------------+---------------------------+
*  98 |         SNTENVPG          |         SNTASCBK          |
*     +---------------------------+---------------------------+
*  A0 |         SNTTODLD          |///////////////////////////|
*     +---------------------------+---------------------------+
*  A8 |                       SNTMARKR                        |
*     +-------------------------------------------------------+
*  B0
*
*** Overlay for SNTSTPAG 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 SNTASM2 in SNTBK
*
*     +-------------------------------------------------------+
* 800 |                       SNTRANGG                        |
*     |                                                       |
*     +-------------------------------------------------------+
* 810
*
*** Overlay for SNTASM2 in SNTBK
          
*** Overlay for SNTRANGG in SNTBK
*
*     +-------------------------------------------------------+
* 800 |                       SNTRANSG                        |
*     +-------------------------------------------------------+
* 808 |                       SNTRANEG                        |
*     +-------------------------------------------------------+
* 810
*
*** Overlay for SNTRANGG in SNTBK
          
*** Overlay for SNTRANSG in SNTBK
*
*     +------------------------------------------------+------+
* 800 |                   SNTRSNOG                     |:RGFGG|
*     +------------------------------------------------+------+
* 808
*
*** Overlay for SNTRANSG 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 SNTMEMBR in SNTBK
*
*     +-------------------------------------------------------+
* 800 |                       SNTMSSNG                        |
*     +-------------------------------------------------------+
* 808 |                       SNTMEMSG                        |
*     +-------------------------------------------------------+
* 810 |                       SNTMEMEG                        |
*     +---------------------------+---------------------------+
* 818 |         SNTMSSAG          |///////////////////////////|
*     +---------------------------+---------------------------+
* 820
*
*** Overlay for SNTMEMBR in SNTBK
          
*** Overlay for SNTMEMSG in SNTBK
*
*     +------------------------------------------------+------+
* 808 |                    SNTMSPG                     |:MSTAG|
*     +------------------------------------------------+------+
* 810
*
*** Overlay for SNTMEMSG 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 Top of page
 
 
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
SNTCPNTE       0048
SNTCPNTG       0064
SNTCPNTL       005C
SNTCPUSE       0010 40
SNTCPUSE       0010 40
SNTDESCT       002C
SNTENPAG       0054
SNTENPGG       0058
SNTENVCT       0030
SNTENVFG       0012
SNTENVPG       0098
SNTESAMD       0012 00000002
SNTESAMM       006C 02
SNTEXCL        0807 01
SNTFLAGS       0010
SNTFWDPT       0000
SNTIMG         0010 04
SNTIMG         0010 04
SNTKEYCT       0034
SNTLGSEG       0C00
SNTLNSHR       0013 20
SNTLODCG       0060
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
SNTMEMBR       0800
SNTMEMCT       004C
SNTMEMDA       0800
SNTMEMDG       0800
SNTMEMEG       0810
SNTMEMEN       080C
SNTMEMSG       0808
SNTMEMSR       004C
SNTMEMST       0808
SNTMENVF       0068
SNTMENVG       006C
SNTMINSZ       0024
SNTMPENP       080F 01
SNTMQNTF       080F 04
SNTMSAVD       080F 02
SNTMSPG        0808
SNTMSRG        004C
SNTMSS         0010 10
SNTMSS         0010 10
SNTMSSA        0810
SNTMSSAG       0818
SNTMSSNG       0800
SNTMSSNM       0800
SNTMSTAG       080F
SNTMULT        006C 80
SNTNAME        0008
SNTNAMFL       0008
SNTNASA        0C00 00000C04
SNTNDAT        0807 04
SNTNDTCT       003C
SNTNLS         0010 08
SNTNLS         0010 08
SNTNOTAG       0068
SNTNOTAM       0060
SNTNTSZL       0C0D 00000010
SNTNTSZM       0818 00000020
SNTPENDP       0011 01
SNTPRBEG       0042
SNTPRDEF       0040 80
SNTPRDEF       0040 80
SNTPREGS       0042
SNTPREND       0043
SNTPRFLG       0040
SNTPRMXG       0800 40
SNTPRNO        0040 40
SNTPRNO        0040 40
SNTPROT        0807 02
SNTPURID       0088
SNTRANE        0804
SNTRANEG       0808
SNTRANGE       0800
SNTRANGG       0800
SNTRANS        0800
SNTRANSG       0800
SNTRGFGG       0807
SNTRNGCT       0028
SNTRNGEN       0807 00000005
SNTRNGER       0807 00000003
SNTRNGEW       0807 00000001
SNTRNGR2       0807 00000007
SNTRNGSC       0807 00000006
SNTRNGSN       0807 00000004
SNTRNGSR       0807 00000002
SNTRNGSW       0807 00000000
SNTRSNOG       0800
SNTRSTD        0010 80
SNTRSTD        0010 80
SNTSDFBK       0020
SNTSEG         0010 01
SNTSEG         0010 01
SNTSHRLK       0070
SNTSHRPT       0044
SNTSHWRT       0013 80
SNTSTAFG       0011
SNTSTLPT       001C
SNTSTPAG       0050
SNTSTPGG       0050
SNTSTRCT       0038
SNTSYS         0010 02
SNTSYS         0010 02
SNTTODLD       00A0
SNTTYPFG       0010
SNTTYPF2       0013
SNTUSREX       0018
SNTUSRSH       0014
SNTVMGRP       0013 40
SNTXBLBK       0094
SNTXCMD        0012 00000004
SNTXCMM        006C 04
SNTZMM         006C 08
SNT370MD       0012 00000001
SNT370MM       006C 01
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:56:08 EDT.
Copyright IBM Corporation, 1990, 2022