Hexadecimal Field
Displacement Name
14
18 1C 20 24
28 RCUCBB DS RCUCHC DS RCUCHD DS RCURSTQ DS RCUOPER DS RCUDVTBL DS RCUSIZE EQU 1F
1F
1F
1F
1F
16B
Field Description, Contents, Meaning Pointer to BCHELOK - path E
Pointer to RCBBLCK - path C Pointer to RCBBLOK - path I RCUELCK Address of control unit to be restarted IOELCK operational on control unit time
Devices attached - RDVSTART index (the index values must be multiplied
by 8 and added to the teginning of the RDEVELOK table (ARIODV).) (*-RCUBLOK)/8 RCUELOK size in doublewords (X'08') Section 1. CP Data Areas and Contrel Blocks 83

RCWT1SK RCWT1SK contains the virtual-to-real CCW translation and other data related to a virtual machine's I/O operation. 1 pointer is maintained to the virtual CCW operaticn. The first CCW-16 points to the beginning of RCWTASK. o RCWPNT RCWVC1W 8 RCWVCNT RCWRCNT RCWBE1!: RCWCCNT 10 RCWCCW (Variable Length) Hexadecimal Field
Displacement Name o
4
8
A C E 10 10 14
15
16 10 RCWPNT DS RCWVCAW DS RCWVCNT DS RCWRCNT DS RCWHE1D DS RCWCCNT DS RCWCCW DS ORG RCW1DDR DS RCW-FLAG DS RCWCTL DS RCiIO BQU RCiGEN EQU RCWHMR EQU RCiREL EQU RCiIS1M EQU RCi2311 EQU RCWINVL EQU RCiSHR EQO RCWCNT DS ORG RCWCOMND DS 1F
1F
1H
1H
1H
1H
1D RCWCCW 1F 11 1X in RCWCTL --X'80'- X'40' X'20' X'10' X'OS' X'04' X'02' X'01' 1H RCW1DDR 11 Field Description, Contents, !eaning Pointer to next RCWT1SK Virtual address of CCi chain Virtual CCi count
Real CCi count RCiTASK header mark X'FFFF' RCiTASK control vord count One or more CCWs for device I/O CCi data address celi flag tits CCW CP-control tits I/O data page locked CP-generated CCi tMKONT must relocate hoae address/record RO CCi address relocatatle if CCis moved IS1! modifying CCi TIP2311T-E pseudo 2311 on 2314 CCi operation code or address is invalid Shared user page vas copied CCW tyte count CCW command code S4 IBM VM/370 Data Areas and Control Block Logic