FCBSECT
Hexadecimal Field
Displacement Naae
6E
6F 70 71
71
72
74
75
76
77
7A
7A
7C
7C
7D
7E
7E 80 80 82 S3 84
84
88 8S 8C 90 94
98
98
9C AO AO AO A4
JFCBIND1 DS JFCBIND2 DS JFCBUFNO DS JFCBFTEK DS JFCBFALN DS JFCBUFL DS JFCEROPT DS JFCKEYLE DS JFCLIMCT FCBDSORG JFCDSORG FCBRECFM
JFCRECFM JFCOPTCD FCBBLKSZ
JFCBLKSI
FCBLRECL
JFCLRECL FCBIOSi DS DS DS DS DS DS DS DS DS DS DS DS !!i::!:§ FCBCLOSE EQU FCBCLEAV EQU FCBPROCC EQU FCBPROCO EQU FCBCASE EQU FCBPVMB EQU FCBIOWR EQU FCBIORD EQU FCBIOSi2 DS x X X OX X H X X X 3X OX 2X OX X X OH H OH H X in FCBIOSW --X'80'--- X'40' X'20' X'10' X'OS' X'04' X'02' X' 0 l' 1X !!!:!:§ in FCBIOSW2 FCBMVFIL EQU --X'08'---- FCBMMV EQU X'02' FCBMVPDS EQU X'01' DEBLNGTH DS DS IHADEB DS DEBTCBAD DS SEBSAV DS DEBOFLGS DS DEBOPATB DS IOBFLG DS !!!:!:§ IOBBFLG EQU IOBOUT EQU lOB IN EQU IOBUPD EQU IOBNXTAD DS IOBECB DS IHAIOB DS DEBDEBID DS DEBDCBAD DS IOBECBCC DS OX F OD A
F 4X 4X OX in IOBFLG --0------ X'40' X'20' X'10' A
F OF OX A OX !!!:!:§ in IOBECBCC
IOBBECBC EQU --12------- IOBBECBP EQU 12
Field Description, Contents, !eaning A*5 Indicator one
A*6 Indicator two
A*7 Number of buffers
Buffering technique
A*8 Buffer alignment
Buffer length
A*9 Error option A*10 Key length
Reserved for IBM use
A*11 EDAM search limit
Data set organization Data set organization
Record format
A*12 Record format
A*13 Option codes
Block size
Block size
Logical record length
Logical record length
A*14 I/O operation indicator Switch turned on during CLCSE operation DISP=LEAVI during CLOSE operaticn GOTO FCBPROC during CLOSE cperation GO TO FCBPROC during OPEN oFeration ON=LOWER CASE console I/C PUT-MOVE-VAR-BLK WRI'II/PUT REAI/GET
A*15 I/O operation indicators Move file is active Move PDS switch for FIND
Switch for MOVEFILE with PIS option
Length of DEB in doutlewords
Reserved for IBM use
Data extent block
A(.ove-mode user buffer) Dynamic save for SEB return address (OS input/output simulation)
Data set status flags OPEN/CLOSE option tyte Start of IOEPREFIX for nor.al scheduling
Displacement of lOB flag in IeB WRI'II,PUT in progress RBAI,GBT in progress QSAM PUTX in progress
A(next buffer to be used) BCE for QSAM normal scheduling
Input/output block
DEE identification
A(data control block) ECB completion code
Displacement of ECB code in ICB Displacement of ECB pointer in lOB 182 IBM VM/370 Data Areas and Control Block Logic

Hexadecimal Field
Displacement Name
A4
A8
A8 BO B4
B8
B8 IOBECBPT DS IOBFLAG3 DS IOBBCSW EQU IOBCSW DS IOBSTART DS IOBDCBPT DS IOBEND FCBEND DS DS FCBENSIZ EQU A OX 16 8X A A ox
aD FCBSECT Field Description, Contents, Eeaning A(event control block) -see IBADECB DSECT I/O error flag
Displacement of CSi in lOB Last CCW stored (that is, residual ceunt) X'It-NEXT BUFFER',AL3(INITIAL BUFFER) A(data control rlock) End ef input/output tlock
End of FCE, JFCB, DEB, and lOB blocks (*-FCBSECT)/8 Size of FCB entry in dourlewords Section 2. CES rata Areas and Contrel Blocks 183