Hexadecimal Field
DisplacementName o
o
4
810 18
1820 28 21 2C 30 34
36
383C 3D
3ElIn "tv 48
48
49
4A
4BII,.. "t ... 50 54
585C 5E
5F60 64 6C 84
85
86
88DOSINIT DS 1lJ:!§ DOSOS EQU DOSDOS EQU DOSCMS EQU DOSDDCAT EQU DOSPERM EQU DOSJCAT EQU DOSUCAT EQU DOSNEXT DS DOSCBID DS DOSDD DS DOSOP DS DOSTAPID DS DOSDSNAM DS DOSDSTYP DS DOSDSMD DS DOSITEM DS DOSBUFF DS DOSBYTE DS DOSFORM DS DOSCOUT DS DOSREAD DS DOSDEV DS ox
inDOSINIT --x''4o'--- X'20' X'10' X'08' X'04' X'02' X'01' A CL4 CL8 eL8 OX CL8 CL8 CL2 B F F CL2 B F X 1lJ:!§ in DOSDEV DOSDUM EQU --0------ DOSDSK EQU 20 DOSTAPMD DS DOSBLKSZ DS DOSWORK DS DOSYSXXX DS DOSSYS DS DOSXXX DS DOSEXT DS DOSEXTCT DS DOSOSFST DS DOSOSDSN DS DOSVOLTB DS DOSEXTTB DS DOSSENSE DS DOSVOLNO DS DOSEXTNO DS DOSBUFSP DS DOSUCNAM DS DOSSAVE DS DOSEXTCX DS DOSTYPE DS DS DOSEND DS X B
DOB 1X 1X 1X 1X F F F B X X F CL8 6F 1X 1C B OD A*1
A*2
A*3
A*4
A*5
A*6
Field Description,Contents, Meaning DOSCE flag l:yte OS user-created bit
Defined fornon-CMS disk
Defined fereMS disk User catalog data set
Permanent control l:lockSearch VSAM job catalog Search VSAM user catalog
AL3(next rOSCB) DLBL to distinguish from CMSCE Data definition name eMS operation
Tape identification
Data setname Data set type Data set mode
Item (record) number
A (input/output l:uffer)Size of buffer (data count)
File format: fixed/varial:le
Records perCMS physical block Numl:er of bytes actually read
Device type code
Dummy device
Disk
Tape mode set to save
Elock sizeWork area
Logical unit forCMS/DOS SYS/FROG unit: X'OO'=SYS, X'01'=PROG DOSSECT Number frem 000-255 associated with the unit
Number of Des extents leftto process Current DOS extent Pointer to CS PST Pointer to es dsname block
A(volumeID table)--VSAM multivclume data set
A(extent tatle) forVSAM data sFace I/O sense data
A*7 No. cf volumes (entries inDOSVOLTB) A*8 No. of extents (entries in DOSEXTTB) Size of VSAM I/C buffer(s) VSAM user catalog ddname Tempcrary save area for re-entrant code
A*9Current extent (used by DMSXCF) A*10 Data set type (SAM=S, VSAM=A) Reserved for IBM use
End address of this tlockDOSENSIZ EQU (*-DOSSECT)/8 Size of block in doutlewords Section 2. CMS rata Areas and Control Blecks 165
Displacement
o
4
8
18
36
38
3E
48
49
4A
4B
58
5F
85
86
88
in
D
A*2
A*3
A*4
A*5
A*6
Field Description,
Defined for
Defined fer
Permanent control l:lock
AL3
Tape identification
Data set
Item (record) number
A (input/output l:uffer)
File format: fixed/varial:le
Records per
Device type code
Dummy device
Disk
Tape mode set to save
Elock size
Logical unit for
Number of Des extents left
A(volume
A(extent tatle) for
A*7 No. cf volumes (entries in
A*9
End address of this tlock