Transfer Vector Table (TVT)

The BDT transfer vector table (TVT) is the primary control block of BDT. It includes pointers to the beginnings of control block chains, addresses of general BDT routines, constants, and initialization parameters from the OPTIONS statement. It is located at CSECT BDTGRVT at the beginning of BDTNUC.

The TVT entries occupy three pages in the BDT formatted dump. The entries are described in the pages that follow. A sentence at the beginning of each page tells which portion of which TVT page in the BDT formatted dump is being described.

A layout of the TVT, with an alphabetical cross-reference of the fields in the TVT, is included in BDT Data Areas.

Figure 1. BDT TVT in the Formatted Dump

BDT FORMATTED DUMP:   SOC1 IN LOW-MEM                 SYSID=SYSA1   DATE=85211   TIME= 7:58:30  PAGE=005



                                      TRANSFER VECTOR TABLE (BDTDTVT) - VERSION 2 RELEASE 1



     OFFSET    LABEL        DATA         LABEL        DATA         LABEL        DATA         LABEL        DATA



      0000    TVTID       E3E5E340      TVTVERS     F1F0F0F0      TVTLNGTH    0538          TVTINDAT    0085211F

      0010    TVTINTIM    07491325      TVTRELNR    F2F0F0F0      TVTASAVE    0019D57C      TVTASVRT    0019D674

      0020    TVTADEQ     001BE3B0      TVTAPTMN    001BE088      TVTAGTMN    001BDDD4      TVTALLOC    001BCA38

      0030    TVTXBPL     0019BE2C      TVTXCPD     0019D42C      TVTXGCL     0019C590      TVTXRCL     0019CB32

      0040    TVTXDPL     0019D064      TVTAWAIT    80            TVTAWTA     1B            TVTAWTL     81

      0049    TVTAWTLA    1B            TVTAWTOF    50            TVTAWTOA    1B            TVTAWTOL    51

      0051    TVTWTOLA    1B            TVTAWTE     FF            TVTAWTEA    1B            TVTABMNO    001C49D0

      005C    TVTABND0    001C6098      TVTABSRV    001C5024      TVTFLDAP    001C4DAE      TVTGSDAX    001C572E

      006C    TVTCSECF    00            TVTCSRQR    001C3060      TVTCSRCP    00233EC0      TVTADFCT    001C26B2

      0078    TVTDLFCT                  TVTFNFCT    001C284A      TVTGTFCT    001C257C      TVTPTFCT    001C27CE
-----------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------

      0698    TVTAPLNJ+4  C1F1D540      TVTASRIM    00001770      TVT                                   4040

      06B6    TVTRSJCT    0064          TVTSYSID    E2E8E2C1      TVTSYSID+4  F1404040      TVTNJEID    E2E8E2C1

      06C4    TVTNJEID+4  F1D54040      TVTTQITD    00000BB8      TVTFSFG1    01            TVTFSFG2    03

      06CE    TVTOPTNS    C8            TVTQIDFG    00            TVTSYSLG    801C9670      TVTJES      F3

      06D5    TVTSLOGC    F2            TVTJSXMX    0040          TVTSLOGL    00001770      TVTSLOGP    0000003C

      06E0    TVTSYSN     E2E8E2C1      TVTSYSN+4   F3F0F8F1      TVTRSD29    00000000      TVTRSD30    00000000

      06F0    TVTRSD31    00000000      TVTRSD32    00000000      TVTRSS30    00000000      TVTRSS31    00000000

      0700    TVTRSS32    00000000      TVTRSS33    00000000      TVTRSS34    00000000      TVTRSS35    00000000

      0710    TVTRSU01    00000000      TVTRSU02    00000000      TVTRSU03    00000000      TVTRSU04    00000000

      0720    TVTSXHDR    E7D6C9C4      TVTSXREL    F1F0F0F0      TVTSXLEN    003C          TVTSXBS1    E2E8E2C1

      072E    TVTSXBS1+4  F1404040      TVTSXBSN    E2E8E2C1      TVTSXBSN+4  F3F0F8F1      TVTSXTYP    07

      073B    TVTSXFL1    00            TVTSDDRS    00000000      TVTSDDRS+4  00000000      TVTSXRD2    00000000

      0748    TVTSXRD3    00000000      TVTSXRS1    00000000      TVTSXRS2    00000000      TVTSXRU1    00000000

This page describes the upper-left quarter of the first TVT page in the dump.

TVTID: is the control block acronym.
TVTVERS: is the TVT version ID.
TVTINTIM: is the time BDT started — hhmmssth.
TVTRELNR: is the BDT release number.
TVTADEQ: indicates resource management.
TVTAPTMN: is the FREEMAIN address.
TVTXBPL: is the quik cell SVCS-build pool.
TVTXCPD: is the quik cell SVCS-CPD access.
TVTXDPL: is the quik cell SVCS-DEL pool.
TVTAWAIT: is the await condition code.
TVTAWTLA: is MFM await processing.
TVTAWTOF: is the await-off condition code.
TVTWTOLA: is MFM await processing.
TVTAWTE: is the await exit condition code.
TVTABND0: is the formatted dump router.
TVTABSRV: is the ESTAE recovery abend SVC.
TVTCSECF: is the common subtask request ECF.
TVTCSRQR: is the common subtask request queue routine.
TVTDLFCT: is the delete FCT routine.
TVTENFCT: is the ENQ/DEQ FCT routine.
TVTIFECF: is the interfunction communication manager ECF.
TVTIFSND: is the interfunction communication send routine.
TVTJNUMR: is the return-a-job-number routine.
TVTJSSRT: is the DAP return point to BDTGRJR.
TVTGETLU: is the LU “put”.
TVTPUTLU: is the “put” LU.
TVTLPUT0: is the LU “get”.
TVTLGET0: is the LU “put”.
TVTXTRC: is the trace routine entry point.
TVTVATR: is the trace routine control area.
TVTRSD02: is reserved.
TVTRFMT0: is the RBAM format queue.
TVTOPN0: is the open RBAM file.
TVTRPRG0: indicates return blocks.
TVTSNOPN: is the SNA BDTXLOPN extension.
TVTSNCLS: is the SNA BDTXLCLS extension.
TVTSCDTA: is the BDT SNA manager data area.
TVTSNRD: is the SNA BDTXLWRD extension.
TVTRQTBA: is the RESQUEUE table address.
TVTRQTBD: is the RESQUEUE table delete character.
TVTXJQE: is the JQE access routine.
TVTXCOMP: is the SCNBLNK compression routine.
TVTCKPNT: is the checkpoint.
TVTABNGT: is the virtual address validation routine.
TVTRSD51: is reserved.
TVTMODLK: is the module name look-up routine.
TVTMFMEP: is the emulation program for the multi-function monitor.
TVTSUPC: is the superscan routine entry point.
TVTXOIDF: is the XOID formatting routine.
TVTXTIME: is the timing services routine.

This page describes the upper-right quarter of the first TVT page in the dump.

TVTLNGTH: is the TVT length.
TVTINDAT: is the date BDT started — 00yydddf.
TVTASAVE: is the ASAVE processing routine.
TVTASVRT: is the ASAVE processing return.
TVTAGTMN: is the GETMAIN address.
TVTALLOC: is the address of the dynamic allocation routine.
TVTXGCL: is the quik cell SVCS “get” cell.
TVTXRCL: is the quik cell SVCS-return cell.
TVTAWTA: indicates MFM await processing.
TVTAWTL: is the await-list condition code.
TVTAWTOA: indicates MFM await processing.
TVTAWTOL: is the awaitoff-list condition code.
TVTAWTEA: is MFM await processing.
TVTABMN0: is the BDT ESTAE routine.
TVTFLDAP: is the fail-a-DAP routine.
TVTGSDAX: is the ESTAE exit abend SVC routine.
TVTCSRCP: is the common subtask request cell pool.
TVTADFCT: is the “add” FCT routine.
TVTGTFCT: is the “get” FCT routine.
TVTPTFCT: is the “put” FCT routine.
TVTFDJNR: is the find-a-job-number routine.
TVTJOBNR: is the job number.
TVTSSNJ: is the DAP return point to BDTGRNJ.
TVTXCKPT: is the DAP checkpoint routine.
TVTLOPN0: is the LU open routine.
TVTLCLS0: is the close-RBAM-file routine.
TVTLRD0: is the LREAD routine emulation program.
TVTLWRT0: is the LWRITE routine emulation program.
TVTLGREC: is the logical record suppression routine.
TVTRSD01: is reserved.
TVTRALC0: indicates allocation blocks (RBNS).
TVTRCLS0: is the LU close routine.
TVTRRED0: is the read data routine.
TVTRWRT0: is the write data routine.
TVTSNGET: is set by the SNA BDTXLGET extension.
TVTSNPUT: is set by the SNA BDTXLPUT extension.
TVTSNWRT: is set by the BDTXLWRT extension.
TVTDQMSG: is the BDTXDQMS service routine.
TVTRQTBP: is the RESQUEUE table “put” routine.
TVTXJCT: is the JCT access routine.
TVTXDCMP: is the data compress/decompress routine.
TVTBDKEY: is the BDT storage protect key.
TVTCSF: is the call subtask function routine.
TVTDJNR: is DJC net release processing.
TVTMESAG: is the console message.
TVTNMSG: is message handler support.
TVTTUAM: is the MJD text unit access method.
TVTRSD05: is reserved.
TVTRSD06: is reserved.
TVTXACC: is the BDT accounting STIMER routine.

This page describes the lower-left quarter of the first TVT page in the dump.

TVTXLOG: is the BDT log manager.
TVTSLACB: is the access method CB pointer.
TVTRSD10: is reserved.
TVTEXL: is the user exit routine address list.
TVTRSD13: is reserved.
TVTRSD14: is reserved.
TVTRSS06: is reserved.
TVTRS07: is reserved.
TVTRSS10: is reserved.
TVTRSS11: is reserved.
TVTRSS14: is reserved.
TVTRSS15: is reserved.
TVTINITF: is the BDT initialization flag.
TVTINDTA: is the pointer to the initialization data CSECT.
TVTICMCP: is the address of the ICMB cell pool CPB.
TVTIFCCP: is the address of the IFC cell poll CPB.
TVTJMLCP: is the address of the JML cell pool CPB
TVTNUMAP: is the map of the BDTNUC CSECTs.
TVTSVCPB: is the address of the save area cell pool CPB.
TVTTQECP: is the address of the TQE cell pool CPB.
TVTLCTUN: is set by the BDTINGN logical units table.
TVTRSTPU: is the first physical entry in restabilization.
TVTSNLTP: is the BDT SNA line LCTUNITS chain.
TVTXFER: is the start of transfer LCTs.
TVTRSD18: is reserved.
TVTRSS16: is reserved.
TVTXDQUE: is the transaction driver queue.
TVTADFQE: is the address of the first queue entry.
TVTXDQLO: is the transaction driver low watermark.
TVTXMQUE: is the cross-memory queue.
TVTXMQHI: is the cross-memory high watermark.
TVTXMQLO: is the cross-memory low watermark.
TVTRSV02: is reserved.
TVTRSV03: is reserved.
TVTNRDAP: is the dynamic DAP counter.
TVTCLDAP: is the called DAP counter.
TVTRSV05: is reserved.
TVTRSV06: is reserved.
TVTRSS19: is reserved.
TVTRSS20: is reserved.
TVTMTECB: is the BDT master ECB flag.
TVTAMECB: is the address of the master ECB.
TVTNUECB: is the ECB that BDTINTK waits on.
TVTAMQUE: is the BDT action message queue.
TVTCMTCB: is the TCB for BDTCMDV.
TVTCSRQU: is the common subtask request queue.
TVTFCTTP: is the first FCT entry.
TVTMSGQU: is the OCMB queue for BDTMSDV.
TVTJQX: is the address of the JQX.
TVTJSSFC: is the BDTGRJS FCT.

This page describes the lower-right quarter of the first TVT page in the dump.

TVTSLEXL: is an access method CB pointer.
TVTSLRPL: is an access method CB pointer.
TVTRSD11: is reserved.
TVTRSD12: is reserved.
TVTRSD15: is reserved.
TVTRSS05: is reserved.
TVTRSS08: is reserved.
TVTRSS09: is reserved.
TVTRSS12: is reserved.
TVTRSS13: is reserved.
TVTEPE: is the end of entry points.
TVTABDCB: is the abend DCB.
TVTMSTCB: is the BDT master TCB.
TVTFCTCP: is the address of the FCT cell pool CPB.
TVTIFNCP: is the address of the NJE IFC cell pool CPB.
TVTJCBCP: is the address of the JCT buffer cell pool CPB.
TVTOCMCP: is the address of the OCMB cell pool CPB.
TVTSCPD: is the BDT system cell pool directory.
TVTTQICP: is the address of the TQI cell pool CPB.
TVTIFC: is the start of the IFC LCTs.
TVTRLTTB: is the resident RLT table.
TVTSNBP: is the BDT SNA buffer pool.
TVTMSGDV: is the address of the first MSGD data area.
TVTRSD17: is reserved.
TVTRSS17: is reserved.
TVTRSS18: is reserved.
TVTXDQCT: is the number of elements queued.
TVTXDQHI: is the high watermark.
TVTXMQ: is the BDTCMDV cross-memory queue.
TVTXMQCT: is the number of elements on the queue.
TVTXDECF: is the transaction driver ECF.
TVTRSV01: is reserved.
TVTRSV04: is reserved.
TVTRSDAP: is the resident DAP counter.
TVTPFLG1: is the BDT termination flag 1.
TVTPFLG2: is the BDT termination flag 2.
TVTRSV07: is reserved.
TVTRSV08: is reserved.
TVTRSS21: is reserved.
TVTITECB: is the ECB for BDTINIT to wait on.
TVTMCECB: is the MCS console command ECB.
TVTMSECB: is the BDT master ECB.
TVTBTAB: is the RBAM bit table.
TVTCKPAR: is the checkpoint area.
TVTEFTOP: is the top of the RESQUEUE ending function.
TVTNETOP: is the NJE ending function queue.
TVTITKPM: is the address of the BDTINTK parameters list.
TVTJNM: is the address of the job number table.
TVTLBDCB: is the BDTLIB DCB pointer.
TVTRSD19: is reserved.

This page describes the upper-left quarter of the second TVT page in the dump.

TVTSTGLS: is the start of the nucleus.
TVTNUCND: is the end-of-nucleus flag.
TVTRSTBL: is the resource management table.
TVTTRTAB: is the system-translate table.
TVTSSCVT: is the pointer to the BDT SSCVT.
TVTWFCT: is the “wait” FCT address.
TVTRSD22: is reserved.
TVTRSD23: is reserved.
TVTRSS24: is reserved.
TVTRSS25: is reserved.
TVTRSS28: is reserved.
TVTRSS29: is reserved.
TVTDDBRQ+8: is the master DDBFX, bytes 9-12.
TVTDDBFX: is the master DDBFX.
TVTSZBUX: is the initialization flag, first halfword.
TVTBUFSZ: is the size of the buffer — halfword.
TVTIFCGM: is the current storage being used for IFC buffers obtained by GETMAIN.
TVTIFCCT: is the current count of IFC buffers obtained by GETMAIN.
TVTRSU05: is reserved.
TVTRSU06: is reserved.
TVTRSD56: is reserved.
TVTRSD57: is reserved.
TVTRSD60: is reserved.
TVTJSCMX: indicates the currently scheduled transfers.
TVTRSD36: is reserved.
TVTRSD37: is reserved.
TVTRSD40: is reserved.
TVTRSD41: is reserved.
TVTRSS42: is reserved.
TVTRSS43: is reserved.
TVTACECF: is the accounting ECF.
TVTRSD44: is reserved.
TVTRSTFL: is the BDT start flag.
TVTSTATE: is the BDT connection state machine.
TVTTQECF: is the TQI ECF.
TVTTQIOF: is the TQI-inoperative flag.
TVTCPSD2: is group 2 of the slow-down flags.
TVTCDECF: is the communications driver ECF.
TVTRSD47: is reserved.
TVTRSD53: is reserved.
TVTRSS49: is reserved.
TVTRSS50: is reserved.
TVTRSS53: is reserved.
TVTRSS54: is reserved.
TVTBDTPL: is used by BDTXGMPM for the default subpool.
TVTBLANK: indicates constant blanks.
TVTHXCHR: indicates hexadecimal characters.
TVTRSD26: is reserved.
TVTSNSET: is the total of SNA sessions for file-to-file.
TVTSNSTN: is the total of SNA sessions for NJE.
TVTRSD55: is reserved.
TVTJMLWA: is the JML work area, bytes 1-4.
TVTJMLWA+12: is the JML work area, bytes 13-16.
TVTCID: is the component ID, bytes 1-4.

This page describes the upper-right quarter of the second TVT page in the dump.

TVTNUCNA: is the end of nucleus address.
TVTOCMQU: is the output console message queue.
TVTSCAN: is the scan/validate/translate table.
TVTSPDCB: is the spool DCB.
TVTRSD20: is reserved.
TVTRSD21: is reserved.
TVTRSD24: is reserved.
TVTRSS23: is reserved.
TVTRSS26: is reserved.
TVTRSS27: is reserved.
TVTDDBRQ: is the master DDBFX, bytes 1-4.
TVTDDBRQ+4: is the master DDBFX, bytes 5-8.
TVTDDBFX+4: is the master DDBFX, bytes 1-4.
TVTRSD33: is reserved.
TVTRSD34: is reserved.
TVTCPUID: is the CPU ID.
TVTIFCGH: is the high watermark for the IFC.
TVTIFCCH: is the high watermark for the number of IFC buffers obtained by GETMAIN.
TVTRSU07: is reserved.
TVTRSU08: is reserved.
TVTRSD58: is reserved.
TVTRSD59: is reserved.
TVTLNOHI: is the TQI high watermark for the LCTOUT queue.
TVTLNOLO: is the TQI low watermark for the LCTOUT queue.
TVTRSD38: is reserved.
TVTRSD39: is reserved.
TVTRSS40: is reserved.
TVTRSS41: is reserved.
TVTRSS44: is reserved.
TVTRSS45: is reserved.
TVTJSFL1: is a JSS flag byte.
TVTJSFL2: is a JSS flag byte.
TVTSTFLG: is the BDT connect state machine flag.
TVTSNECF: is the BDT SNA manager ECF.
TVTTQIFG: is the TQI control flag.
TVTCPSD1: is group 1 of the slowdown flags.
TVTCDECX: is the communication driver ECF extension.
TVTMSGCF: is the message data set driver ECF.
TVTRSD54: is reserved.
TVTRSS48: is reserved.
TVTRSS51: is reserved.
TVTRSS52: is reserved.
TVTRSS55: is reserved.
TVTADMSK: is the constant for the address mask.
TVTCPUF: is the CPU factor.
TVTDFACT: indicates default accounting.
TVTRMFF: is the hexadecimal constant FF.
TVTRM7F: is the hexadecimal constant 7F.
TVTSNSEL: is the session limit.
TVTZERO: is the zero constant.
TVTJMLWA+4: is bytes 5-8 of the JML work area.
TVTJMLWA+8: is bytes 9-12 of the JML work area.
TVTCID+4: is bytes 5-8 of the component ID.
TVTCIDB: is the component ID base.

This page describes the lower-left quarter of the second TVT page in the dump.

TVTRSS56: is reserved.
TVTRSS57: is reserved.
TVTEBCOM: is the NJE communications VLU name (external).
TVTEBCS1: is the an NJE VLU name (external).
TVTEBCS1+9: is an NJE VLU name (external).
TVTEBCS2: is an NJE VLU name (external).
TVTEBCS2+9: is an NJE VLU name (external).
TVTEBCS3: is an NJE VLU name (external).
TVTEBCS3+9: is an NJE VLU name (external).
TVTEBCS4: is an NJE VLU name (external).
TVTEBCS4+9: is an NJE VLU name (external).
TVTEBCS5: is an NJE VLU name (external).
TVTEBCS5+9: is an NJE VLU name (external).
TVTEBCS6: is an NJE VLU name (external).
TVTEBCS6+9: is an NJE VLU name (external).
TVTEBCS7: is an NJE VLU name (external).
TVTEBCS7+9: is an NJE VLU name (external).
TVTSTCOM: is the NJE communications VLU name (internal).
TVTSTID1+2: is an NJE VLU name (internal).
TVTSTID1+3: is an NJE VLU name (internal).
TVTSTID2+2: is the an NJE VLU name (internal).
TVTSTID2+3: is the an NJE VLU name (internal).
TVTSTID3+2: is an NJE VLU name (internal).
TVTSTID3+3: is an NJE VLU name (internal).
TVTSTID4+2: is an NJE VLU name (internal).
TVTSTID4+3: is an NJE VLU name (internal).
TVTSTID5+2: is an NJE VLU name (internal).
TVTSTID5+3: is an NJE VLU name (internal).
TVTSTID6+2: is an NJE VLU name (internal).
TVTSTID6+3: is an NJE VLU name (internal).
TVTSTID7+2: is an NJE VLU name (internal).
TVTSTID7+3: is an NJE VLU name (internal).
TVTCICDYN: is the DYNALLOC card, bytes 1-4.
TVTCICDYN+4: is the DYNALLOC card, bytes 5-8.
TVTCIDYX+4: is bytes 5-8 of TVTCIDYX.
TVTCIDYX+8: is bytes 9-12 of TVTCIDYX.
TVTCIDAT: is the initialization checkpoint data, bytes 1-4.
TVTCIDAT+4: is the initialization checkpoint data, bytes 5-8.
TVTCIDAX+4: is bytes 5-8 of TVTCIDAX.
TVTCIDAX+8: is bytes 9-12 of TVTCIDAX.
TVTCIDAX+20: is bytes 21-24 of TVTCIDAX.
TVTCIDAX+24: is bytes 25-28 of TVTCIDAX.
TVTCIDAX+36: is bytes 37-40 of TVTCIDAX.
TVTCICK1: is checkpoint record 1, bytes 1-4.
TVTCICKX: is 5 extent entries, bytes 1-4.
TVTCICKX+4: is 5 extent entries, bytes 5-8.
TVTCICKX+16: is 5 extent entries, bytes 16-19.
TVTCICK2: is checkpoint record 2, bytes 1-4.
TVTCICKY: is 5 extent entries, bytes 1-4.
TVTCICKY+4: is 5 extent entries, bytes 5-8.
TVTCICKY+16: is 5 extent entries, bytes 16-19.
TVTCIJCT: is the JCT DDB fixed area.
TVTCIJCX: is 10 extent entries, bytes 1-4.
TVTCIJCX+4: is 10 extent entries, bytes 5-8.

This page describes the lower-right quarter of the second TVT page in the dump.

TVTRSS58: is reserved.
TVTRSS59: is reserved.
TVTEBCS1+3: is an NJE VLU name (external).
TVTEBCS1+6: is an NJE VLU name (external).
TVTEBCS2+3: is an NJE VLU name (external).
TVTEBCS2+6: is an NJE VLU name (external).
TVTEBCS3+3: is an NJE VLU name (external).
TVTENCS3+6: is an NJE VLU name (external).
TVTEBCS4+3: is an NJE VLU name (external).
TVTEBCS4+6: is an NJE VLU name (external).
TVTEBCS5+3: is an NJE VLU name (external).
TVTEBCS5+6: is an NJE VLU name (external).
TVTEBCS6+3: is an NJE VLU name (external).
TVTEBCS6+6: is an NJE VLU name (external).
TVTEBCS7+3: is an NJE VLU name (external).
TVTEBCS7+6: is an NJE VLU name (external).
TVTSTID1: is an NJE VLU name (internal).
TVTSTID1+1: is an NJE VLU name (internal).
TVTSTID2: is an NJE VLU name (internal).
TVTSTID2+1: is an NJE VLU name (internal).
TVTSTID3: is an NJE VLU name (internal).
TVTSTID3+1: is an NJE VLU name (internal).
TVTSTID4: is an NJE VLU name (internal).
TVTSTID4+1: is an NJE VLU name (internal).
TVTSTID5: is an NJE VLU name (internal).
TVTSTID5+1: is an NJE VLU name (internal).
TVTSTID6: is an NJE VLU name (internal).
TVTSTID6+1: is NJE VLU name (internal).
TVTSTID7: is an NJE VLU name (internal).
TVTSTID7+1: is an NJE VLU name (internal).
TVTABTIM: is the BDTINCD recursive abend time delay.
TVTABMAX: indicates the BDTINCD recursive abend, maximum abends.
TVTCIDYN+8: is bytes 9-12 of the DYNALLOC card.
TVTCIDYX: is 5 extent entries, bytes 1-4.
TVTCIDYX+12: is 5 extent entries, bytes 13-16.
TVTCIDYX+16: is 5 extent entries, bytes 17-20.
TVTCIDAT+8: is the initialization checkpoint data, bytes 9-12.
TVTCIDAX: is 10 extent entries, bytes 1-4.
TVTCIDAX+12: is 10 extent entries, bytes 13-16.
TVTCIDAX+16: is 10 extent entries, bytes 17-20.
TVTCIDAX+28: is 10 extent entries, bytes 29-32.
TVTCIDAX+32: is 10 extent entries, bytes 33-36.
TVTCICK1+4: is checkpoint record 1, bytes 5-8.
TVTCICK1+8: is checkpoint record 1, bytes 9-12.
TVTCICKX+8: is 5 extent entries, bytes 9-12.
TVTCICKX+12: is 5 extent entries, bytes 13-16.
TVTCICK2+4: is checkpoint record 2, bytes 5-8.
TVTCICK2+8: is checkpoint record 2, bytes 9-12.
TVTCICKY+8: is 5 extent records, bytes 9-12.
TVTCICKY+12: is 5 extent records, bytes 13-16.
TVTCIJCT+4: is the JCT DDB fixed area, bytes 5-8.
TVTCIJCT+8: is the JCT DDB fixed area, bytes 9-12.
TVTCIJCX+8: is 10 extent entries, bytes 9-12.
TVTCIJCX+12: is 10 extent entries, bytes 13-16.

This page describes the upper-left quarter of the third TVT page in the dump.

TVTCIJCX+16: is 10 extent entries, bytes 17-20.
TVTCIJCX+20: is 10 extent entries, bytes 21-24.
TVTCIJCX+32: is 10 extent entries, bytes 33-36.
TVTCIJCX+36: is 10 extent entries, bytes 37-40.
TVTDDBR3: is reserved.
TVTDDBR4: is reserved.
TVTJBNTL: is the default job execution time.
TVTAPLID: is the application ID for the open ACB.
TVTAPLNJ+4: is the application ID for the NJE ACB, bytes 5-8.
TVTASRTM: is the ASR time delay.
TVTRSJCT: is the resident JCT maximum count.
TVTSYSID: is the BDT system ID for file-to-file.
TVTNJEID+4: is the BDT system ID for NJE, bytes 5-8.
TVTTQITD: is the TQI time delay — 30 seconds.
TVTOPTNS: is the BDT options flag.
TVTQIDFG: is the auto disable flag for TQI.
TVTSLOGC: is the default BDT SYSLOG class.
TVTJSXMX: is the maximum number of scheduled transfers.
TVTSYSN: is the SYSNAME for the proc BDT is on, bytes 1-4.
TVTSYSN+4: is the SYSNAME for the proc BDT is on, bytes 5-8.
TVTRSD31: is reserved.
TVTRSD32: is reserved.
TVTRSS32: is reserved.
TVTRSS33: is reserved.
TVTRSU01: is reserved.
TVTRSU02: is reserved.
TVTSXHDR: is the control block acronym.
TVTSXREL: is the version ID.
TVTSXBSI+4: is the transaction origin — BDT SYSID.
TVTSXBSN: is the transaction origin — BDT SYSNAME.
TVTSXFL1: is the XOID flag 1.
TVTSDDRS: is the DDNAME.
TVTSXRD3: is reserved.
TVTSXRS1: is reserved.
TVTSXRU2: is reserved.

This page describes the upper-right quarter of the third TVT page in the dump.

TVTCIJCX+24: is 10 extent entries, bytes 25-28.
TVTCIJCX+28: is 10 extent entries, bytes 29-32.
TVTDDBR1: is reserved.
TVTDDBR2: is reserved.
TVTACNTL: is the accounting timing interval — .01 seconds.
TVTJBPTY: is the default job priority.
TVTAPLID+4: is the application ID for the open ACB, bytes 5-8.
TVTAPLNJ: is the application ID for the NJE ACB.
TVTJBRPD: is the job retention period (days).
TVTRSD25: is reserved.
TVTSYSID+4: is the BDT system ID for FTF, bytes 5-8.
TVTNJEID: is the BDT system ID for NJE.
TVTFSFG1: is the fail-soft flag 1.
TVTFSFG2: is the fail-soft flag 2.
TVTSYSLG: is the SYSLOG flag.
TVTJES: is the JES identifier.
TVTSLOGL: is the default BDT SYSLOG line limit.
TVTSLOGP: is the default BDT SYSLOG page length.
TVTRSD29: is reserved.
TVTRSD30: is reserved.
TVTRSS30: is reserved.
TVTRSS31: is reserved.
TVTRSS34: is reserved.
TVTRSS35: is reserved.
TVTRSU03: is reserved.
TVTRSU04: is reserved.
TVTSXLEN: is the XOID length.
TVTSXBSI: is the transaction origin — BDT SYSID.
TVTSXBSN+4: is the transaction origin — BDT SYSNAME.
TVTSXTYP: is the transaction origin — type.
TVTSDDRS+4: is the DDNAME, bytes 5-8.
TVTSXRD2: is reserved.
TVTSXRS2: is reserved.
TVTSXRU1: is reserved.