Data Areas
The following data areas are used by the3704/3705 com.ana processor modules: • Active Disk Table (ADT) • Communications List (CCPAB!!) Controllers Parameter • File System Control Block (FSCB) • Network Interface Control Elock (NICELOK) • Beal Device Block (BDEVELCK) • Spool File Block (SFBLCK) • Virtual !!achine Block (V!BLCK) • Input/Output Block CIOBLOK) All the above data areas except the FseE
are described in theVt!L37.Q ]!ta J!!!§ !!!g Block§ Logic. The FSCE is
described in Figure 9-8.
FILESYSTE!! CONTBOL BLOCK Or-----------------------------------------------, FSCBFNCT 8 FSCBID I 18 11A FSeEBICN 1C FSCBBUFA 20 FSCBSIZE 24 FSCBFBMT I FSCEBOR 1------------------------------------------------ 281 FSCBLIOB Hex Dec --0 --0 FSCBFNCT DS CL8 Control field for 1/0 function
8 8FSCBID DS OCL18 File Ident ifier
8 8FSCBFN DS CL8 Filenalle 10 16 FSCBFT DS CL8 Filetype
18 24FSCBFM DS CL2 Filellode
1A 26FSCBBECN DS H
Belative recordnumber 1C 28 FSCBBUPA DS A Euffer address 20 32 PSCBSIZ! DS P Euffer size
24 36PSCBPB!!T DS CL2 File format
26 38FSCBNOB DS OH Number of records to l:e read
2840 FSCBLIOB DS A Figure 9-9. Pile Systea Control Block (PSCB) 190 IBM V!!/370 Service Boutines Program Logic
The following data areas are used by the
are described in the
described in Figure 9-8.
FILE
8 8
8 8
18 24
1A 26
Belative record
24 36
26 38
28