COMDSECT COMDSECT defines address constants used as pointers to subroutines co.mon to all RSCS modules. These subroutines are contained in module DMTCOM. COMDSECT is Fointed to by TCOM in SVECTORS. 0 4
8 C 10 14
Hexadecimal Field
Displacement Na.e o
4
8 C 10 14
GLINKREQ
GPAGEREQ
FPAGEREQ PMSGREQ GMSGREQ GTODEBCD DS 1A DS 1A DS 1A DS 1A DS 1A DS 1A
,
GLINKREQ
GPAGEREQ
FPAGEREQ PMSGREQ GMSGREQ GTODEBCD Field Description, Contents, Meaning Get link tatle entry routine
Get Fage of main storage
Free page of main storage
Put .essage element into message stack
Re.ove message ele.ent fro. .essage stack
convert S/370 TOD to EBCDIC 250 IBM VM/370 Data Areas and Control Block Logic

DEVT1ELE DEVT1BLE defines virtual device information for an I/O operation. This DSECT corresponds
to the IOTAELE DSECT.
o DEVLOCK 4 DEVADDR , DEVSNREQ DEVTYPE 8 DEVSTART C DEVCSW 14 DEVSENSE rEVFLAGS 18 DEVNll!E 1C
Hexadecillial Field
Displacement Name Field Description, Contents, !!eaning ------------ -------------------------------------- 0 DEVLOCK DC F'O' I/O request synch lock
4 DEVADDR DC lL2 (0) CUU address of I/O device
6 DEVSNREQ DC AL 1 (0) Requested sense bytes
7 DEVTYPE DC X'OO' Vl!/310 device type code 0 DEVSTART DC F'O' Address start channel program v
for I/O handling
C DEVSIOCC DC OX'OO' Right-justified SIC condition code
C DEVCSW DC 2F'0' Ending CSW from last I/O oFeraticn
14 DEVSENSE DC X'OO' Sense information on unit check
15 DEVFLAGS DC 31'00' Device status flags
18 DEVNAME DC CL8' , EEerle device address and name Section 3. RSCS rata Areas and Control Blocks 251