Hexadecimal
Displacement
------------0 0 2
4
8
9C D
E10 11
12
14
181C 1E 1F 20 24
282C 30 34
35
36
37
383C 40 48
49
4A
4B4C 54
585C 5D
5E
5F
Field
NalleTTCT DS OB TCTSTRT DS CL2 TCTENTY DS CL2 TCTRTN DS CL4 TCTCCW DS CL1 TCTDATA DS AL3 TCTFLAG DS CL1 TCTOPCOD DS CL1 TCTCCWCT DS AL2 TCTECB DS CL1 TCTECB i'10'---- TCTBUSY EQU TCTSTAT DS CLl Bits defined in TCTSTAT TCT1052--EQU 1'10'------ TCTREL EQU X'04' TCTOPEN EQU X'80' TCTACT EQU X'40' TCTWFB TCTSAV1 TCTNEXT TCTFCS TCTRCBR TCTRCBT TCTCOM DSAL1 DS 1F DS 1F DS AL2 DS CL1 DS CL1 DS, 1F TDEVSYNC DS 1F TDEVREQN DS CL4 TDEVREQ DS 1A TDEVRESP DS 1A TDEVRLEN DS AL1 TDEVFUN DS AL1 TDEVRESV DS AL1 TDEVSOPT DS AL1 TDEVTAG DS 1A TDEVFIOA DS 1A TDEVLINK DS CL8 TSW1 DS AL1 TSW2 DS AL1 TSW3 DS AL1 TSW4 DS AL1 TCTTOVM DS CL8 TCTTANK DS 1F TCTBUFER DS 1F TCTTNKLM DS CL1 TCTTNKCT DS CL1 TCTBUFLM DS CL1 TCTBUFCT DS CL1 TCTDSECT Field Description, Contents, Meaning Branch to proper processor entry
Address portion modified by Frocessor
Eranch to next Frocessor viacommutator CCW for device operation code
Address of data transferred
Flags onCCli Save area for CCW operation code CCli count of data transferred
Event control block
Device busy bitStatus flags TCT status flags for 1052 Interlock release request for console TCT open bit
Action required on thisTCl Waiting for buffers Save area for processor routine
NextTCT in chain
Function control sequence maskRECV record control tlock
Trans record control block
Pointer back to commutatorSynch lock
File access name
Request buffer address
Responsetuffer Request length
Request function
Reserved forIBM use
Subordinate option byte
Tag address
FileI/O area
Link name
Device switch 1
Device switch 2
Device switch 3
Device switch 4Virtual machine output destination
Next tank to generate output
Address of current bufferMaximum numter of tanks assignable Current numter assigned Maximum numler of tuffers assignable Current numler assigned Section 3. RSCS tata Areas and Control Blocks 211
Displacement
------------
4
8
9
E
12
14
18
28
35
36
37
38
49
4A
4B
58
5E
5F
Field
Nalle
Address portion modified by Frocessor
Eranch to next Frocessor via
Address of data transferred
Flags on
Event control block
Device busy bit
Action required on this
Next
Function control sequence mask
Trans record control block
Pointer back to commutator
File access name
Request buffer address
Response
Request function
Reserved for
Subordinate option byte
Tag address
File
Link name
Device switch 1
Device switch 2
Device switch 3
Device switch 4
Next tank to generate output
Address of current buffer
