NUCON Hexadecimal Field
Displacement Name C68
C6C C70 C74
C78
C7C
C7D C80 C84
C88
C8C C90 C94 CAO ADIKQLAB DC
NDIKQLAB DC ARURTBL DC ADMSVIB DC AVIPWORK DC VSAMFLG1 DC VSAMRUN EQU VSJOBCAT EQU VIPINIT EQU VSIMSERV EQU VIPSOP EQU VIPTCLOS EQU VSAMSOS EQU DS AVSAMSYS DC AAMSSYS DC AVSREOJ DC AVSRWORK DC
ACBLIST DC DS DS A(X'FFFFFF') A (0) V (RURTBL) V (DMSVIB) A (0) X'OO' A*18
in VSAMFLG1 --X'80'---- X'40' X'20' X'10' X'08' X'04' X'02' 3X A (0) A (0) V ($$BEOJ4) A (0) A (0) 3F OD Field Description, contents, Set to A(IKQLAB) when it is in storage Set to end of IKQLAB when in stcrage VSAM resource table address
Address of VSAM interface bootstrap
Address of rMSVIP work area VSAM information flag VSAM system loaded VSAM job catalog active DMSVIP has teen initialized CMSAMS system loaded (AMSEBV OS interface SVC 2 call
as TCLOSE call
as AMSERV running
Reserved for IBM use
running)
Address of VSAM saved system Address of CMSAMS saved system DMSVSR entry point from VSAM $$EACLOS Address of rMSVSR work area
ACE list built ty OPEN/CLOSE Reserved for IBM use
218 IBM VM/370 Data Areas and Control Block Logic

OPSECT OPSECT describes the fields used by several programs as parameter lists for reading and
writing on disks and other devices. The OPSECT CSECT is pointed to by the AOPSECT field
in NUCON. o
8 10 18 20 28 30 38 40 48 50 58 60 68 70 78 80 88 90 98' AO A8 BO B8 CO C8 CMSOP FILENAME FILETYPE FILE MODE FILEITEM FILEBUFF FILEBYTE FILEFORM FILECOUT FILEREAD SAVER14 SAVER15 SAVERO SAVER1 CMSNAME CMSNAME (cant.) CONREAD CONREAD (cant.) CONRDBUF A*1 CONRDCNT 1////////////1////////////// WAITLIST CONWRITE CONWRBUF I A*2 CONWRCNT WAITLST WAITDEV REALLST READLST (cant.) RtBUFF RDCCW RDCOUNT PUNCHLST PUNCHLST (cant.) PUNEUFF PUNCOUNT PRINTLS'I PRINTLST (cant.) PRBOF PRCNT TAPELIS'I TAPE LIST (cant.) TAPEOPER TAPEOPEB (cant.) TAPEDEV A*3 TAPEBUFF TAPE SIZE
Section 2. CMS Lata Areas and central Blocks 219