Field Nalle ].!ts CHANO EQU CHAN1 EQU CHAN2 EQU CHAN3 EQU CHAN4 EQU CHANS EQU CHANM EQU EXTM EQU BCMM MCKM WAIT PROB FOFM DOFM EOFM SIGM ].!ts ATTN SM COE BOSY CE DE O_C OE PCI ICL PGC PTC CtC CCC ICC CHC EQO EQO EQU EQO EQU EQO EQU EQU EQO EQU EQO EQU EQU EQU EQJ} EQU EQU EQU EQU EQO EQU EQU EQU EQU .!.!! !he X'SO' X'40' X'20' X'10' X'OS' X'04' X'02' X'01' X'OS' X'04' X'02' X'01' X'OS' X'04' X'02' X' 01' 1!! !he X'SO' X'40' X'20' X'10' X'OS' X'04' X'02' X'01' X'SO' X'40' X'20' X'10' X'OS' X'04' X'02' X'01' WRITE READ NOP SENSE WRDATA RtDATA SEEK TIC WRITE1 RDCONS SETSEC SEARCH Command x'Oi'-­ X'02' X'03' X'04' X'OS' X'06' X'07' X'OS' X'09' X'OA' X'23' X'31' EQU EQU EQU EQU EQU EQU EQU EQU EQU EQU EQU EQU Field Description, Contents, Meaning !grd (PSW) Bit 00 - channel a mask Bit 01 - channel 1 mask Bit 02 - channel 2 mask Bit 03 - channel 3 mask Bit 04 - channel 4 mask Bit OS - channel S mask Bit 06 - input/output mask Bit 07 - external mask
Bit 12 -extended control mode mask Bit 13 -machine check mask Bit 14 -wait state mask Bit 1S -problem state mask Bit 36 -fixed-point overflow mask Bit 37 -decimal overflow mask
Bit 3S - exponent under flew mask Bit 39 -significance Ilask Status Word (CS!) -"BIt-32-=- attention
Bit 33 -status lIodifier Bit 34 -control onit end
Bit 3S -busy
Bit 36 -channel end Bit 37 -device end .BJ1:.3S - unit .ch.eck Bit 39 -unit exception
Bit 40 - program-centrolled interropt
Bit 41 -incorrect length
Bit 42 - program check
Bit 43 -protection check
Bit 44 -channel data check
Bit 4S -channel centrol check
Bit 46 -interface control
Bit 47 -chaining check Write Read
No operation
Sense Write data
Read data
Seek
Transfer in channel Write and space 1
Read from console
Set sector
Search ID equal
check in a Channel Command Word (££!) CD EQU --x'SO'----- ----BIt 32-= chain data CC EQU X'40' Bit 33 - comlland chain
SILl EQU X'20' Bit 34 -suppress incorrect length
SKIP EQU X'10' Bit 3S -suppress data transfer PCIF EQU X'OS' Bit 36 -cause program control interrupt
IDA EQU X'04' Bit 37 -indirect data address 308 IBM VM/370 Data Areas and Control Block Logic

Field
Name
General RO---- Rl R2
R3
R4
R5
R6
R7 RS R9 Rl0 R i 1
R12
R13
R14
R15 EQU 0 EQO 1 EQO 2 EQO 3 EQO 4 EQO 5 EQO 6 EQO 7 EQO 8 EQO 9 EQO 10 EQO EQU EQO EQO EQO 11
12
13
14
15 o FO EQU F2 EQO 2
F4 EQO 4 F6 EQO 6
Extended CO----- Cl C2
C3
C4
C5 C6 C7 CS C9 C10 Cll e12
C13
C14
C15
control EQU---O EQO 1 EQO 2 EQU 3 EQO 4 EQO 5 EQO 6 EQU 7 EQO 8 EQO 9 EQO 10 EQO 11 EQO 12 EQO 13 EQO 14 EQO 15
Field Description, Contents, Meaning Appendix D. CMS Equate Symbols 309