Page of SY20-0884-3 As Updated Aug. 1, 1979 by TNL SN25-0497 PSA Hexadecimal
Displacement
------------
688
68C 690 694
696
698
69A
69A
69B
69C
69D
69E
69F 6AO 6A4
6A8
Field
Name EMSPEND DC ]i!§ EMSPQUI EQU EMSPEXT EQU EMSPSYNC '1:'1"1" .LJ\lU EMSPSHD EQU EMSPCLKC EQU EMSINQSC EQU EMSREC DC Bi!§ defined EMSRQUI EQU EMSREXT EQU EMSRSYNC EQU EMSRSHD EQU EMSRCLKC EQU XCPEND DC Bi.i§ defined XCAPR EQU XCRES EQU XCWAK EQU XCDISP EQU IPUADDRX DC LPUADDR DC LPUADDRX DC APSTATUS DS ORG APSTAT1 DC Bit§ APUOPER EQU PROCIO EQU APUNONLN EQU MPFEAT EQU CSSFEAT EQU CPINITD EQU APSTAT2 DC ]i.i§ CPMCHLK EQU CPPTLBR EQU CPTERMLK DC CPFRELK DC FRLKPROC DC CPFRESW DC
AMCHAREA DC SHRLKCNT DC PROBSTRT DS F'O' in EMSPENI! X'80' X'40' X'20' x' 10' X'08' X'01' F'O' in EMS,EEC X'80' X'40' X'20' x' 10' X'08' F'O' in X'80' X'40' X'20' x' 10' H'O' H'O' H'O' 6X APSTATUS X'OO' in APS1ATj X'80' X'40' X'20' x' 10' X'02' X'01' X'OO' in !RSTATl x' 10' X'02' X'OO' X'OO' X'OO' X'OO' F'O' F'O' 1D
Field Description, Contents, Meaning
Emergency signal pending flags
Quiesce pending
Extend pending Synchronization pending Shutdown pending
High order TOD synchronization pending Processor is quiesced
Emergency signal received flags
Quiesce request received
Extend request received
Synchronization request received Shutdown request received
High order TOD synchronization received
External call pending flags
Automatic processor recovery pending
Resume request pending
Wakeup request pending
Dispatch request pending P*7 Processor address of other processor P*8 Logical address of this processor P*9 Logical address of other processor
Attached processor status bytes
Attached processor status
Attached processor operational
Processor has I/O capability System generated for attached processor mode
but running in uniprocessor mode
Multiprocessing feature is installed
Channel set switching feature installed System initialization complete Second flag byte
Machine check processing pending
(for ECP S only) PTLB required for processor DMKMCT system termination is in progress.
Note that CPTERMLK is in absolute PSA. Free storage extend pending.
Note that CPFRELK is in absolute PSA. Logical processor identification for CPFRELK. Note that FRLKPROC is in absolute PSA. DMKFRE must transfer execution to the
attached processor. Note that CPFRESW is in absolute PSA. Address of DMKMCH work area
Count of times CPSHRLK is set (used to clear CPSHRLK) Virtual machine time out queue at dispatch 76 VM/370 Data Areas and Control Block Logic

Auge 1, 1979 RCHBLOK RCH..BLOK contains status and type information for the specified channel. The linkage to I/O tasks operated on by that channel and to the control units attached to that channel
is also maintained. The ARIOCH field of the PSA points to the first RCHBLOK, which is
generated in contiguous storage. 0 8 10 18 20 Hexadecimal
Displacement
------------ 0 2
4
5
6 a C 10 11
12
13
14
18 1C 20 r- RCHADD I RCHLOCK R*1 R*2 RCHQCNT RCHFIOB RCHLIOB R*3 I R*4 I R*5 I R*6 RCHSTIDC BCHRSTQ RCHOPER L- Field
Name RCHADD DS RCHLOCK DS RCHSTAT DS Bit.§ RCHBUSY EQU RCHSCED EQU RCHDED EQU RCHTYPE DS Bi.!:.§ RCHSEL EQU RCHBMX EQU RCHMPX EQU RCH370 EQU RCHQCNT DS RCHFIOB DS RCHLIOB DS RCHDTCK DS RCHCCCK DS RCHIFCC DS RCHCHCK DS RCHSTIDC DS RCHRSTQ DS RCHOPER DS RCHCUTBL DS RCHSIZE EQU RCHCUTBL (Variable Length)
1H
1H 1X .!n x'ao' X'40' X'01' 1X in RCHTYPE --XIaO-'-- X'40' X'20' X'01' 1H
1F
1F 1X 1X 1X 1X 1F
1F
1F
32H
Field Description, Contents, Meaning Channel address Channel lock
R*1 Channel status Channel busy lOB scheduled on channel Channel dedicated
R*2 Channel type
R*3
R*4
R*5
R*6 Selector channel
Block multiplexer channel
Bvte multiplexer channel Si370 type-channel (S/370 110 instruction
support)
Number of IOBLOKs queued off channel
Pointer to first IOBLOK queued
Pointer to last IOBLOK queued Channel data check count Channel control check count
Interface control check count Channel chaining check count
Result of STIDC instruction issued
at CP initialization; if cc = 3, the
content is X'FFFFFFFF' Address of channel to be restarted IOBLOK operational on channel time Control units attached - RCUSTART index
(The index values must be by a and added to the beginning of the RDEVBLOK table (ARIODV).) (*-RCHBLOK}/8 RCHBLOK size in doublewords (X'OD') section 1. CP Data Areas and Control Blocks 81