Hexadecimal Field
Displacement Name 434
438 43C 440 470 478 440 480 484
488 48C 490 494
498 49C 4AO 4A4
4A8 4AC 4BO 4B4
4B8 4BC 4CO 4C4 4C8 4CC 4DO 4D4
4D8 4De 4EO 4E4
4E8 4EC 4FO 4F4 4F8 4FC 500 500 540 580 5CO 600 640 650 660 664
668 66C 670 678 680 684 INSTWRD2 DC INSTWRD3 DC INSTWRD4 DC bis! 2! ZEROES BLANKS FFS FO F1
F2
F3
F4
F5
F6
F7
F8
F9 F10 F15
F16 F20 F24 F60 F240 F255
F256 F409S F4096 DC DC DC EQO DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC APTRLK DC NOADD DC X40FFS DC XRIGHT24 DC XPAGNOM DC XRIGHT16 DC AFREE DC AFRET DC AQCNWT DC iDSPCH DC APTRAN DC X2048BND DC PSBCLR2 DS DUMPSAVE DS SIGSAVE DS LOKSAVE DS BFASAVE DS SWTHSAVE DS LOCKSAV DS SVCREGS DS PREFIXA tc PREFIXB DC PSACPXBP DC RESVD DS WAITSTRT DS WAITEND DS PiTPAGES DC ACTIVTRQ DC F'O' F'O' F'O' 6D'0' 8X'40' 8X'FF' ZEROES F'1'
F'2' F
1
3' F'4' FIS' F'6'
F'7'
F'8'
F'9' F'10' F' 15'
F' 16' F'20' F'24' F'60' F'240' F'255'
F'256' F'4095' F'4096' V (D MKPTRLK) X'PFOOOOOO' X'40FFFFFF' X'OOFFFFFF' X'OOFFFOOO' X'OeOOFFFF' V (DMKFREE) V (D l!KFRET) V (DMKQCNWT) V V (DMKPTRAN) X'00FFF800' OF 16F
16F
16F
16F
16F
4F
4F F'O' F'O' A (0) 1F
D
D F'O' A (0) Field Description, Contents, Meaning Reserved for installation use
Reserved for installation use
Reserved for installaticn use
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-1
= X'CCCCOOOF' X'CCC0003C' = X'COCCOOFO' = X'CCCOOOFF' X'CCC00100' = X'CCCOOF!F' = X'CCC01000' C' 0' Entry to lock a page in stcrage
Frequently used work value
Frequently used work value
Isolate right 24 bits
Isolate the page numrer Isolate the right 16 bits Entry to allocate free storage
Entry to release free storage Entry to write a terminal message Entry to the VM/370 dispatcher Entry to the paging supervisor
Locate a half-page boundary Start of second area cleared by CP initialization (DMKCPI) Save area for dump routine Save area fer DMKEXT DMKLCK save area Save area for malfunction alert DMKVMASW save area LOCK macro save area SVC save area Prefix valUE of this processor Prefix value of other prccessor
Address of CPEXBLOK for switcb SVC. Note that PSACPXEP is in absolute PSA. Reserved for IBM use
Timer value at start of wait
Timer value at end of wait Pages in PGWAIT at start of wait
Address of active transit queue PSI Section 1. CP Data Areas and Control Blocks 75

PSA Hexadecimal Field
Displacement Nalle ------------
688 EftSPEND DC !t!!§ EftSPQUI EQU EftSPEXT EQU EftSPSYNC EQU EftSPSHD EQU EftSPCLKC EQU EftSINQSC EQU 68C EftSREC DC Jlit§ E!SRQUI EQU E1!SREXT EQU EftSRSYNC EQU EftSRSHD EQU EftSRCLKC EQU 690 XCPEND DC Jlit§ XCAPR EQU XCRES EQU XCWAK EQU XCDISP EQU 694 IPUADDRX DC
696 LPUIDDR DC
698 LPUADDRX DC
69A APSTATUS DS ORG 69A APSTATl DC Jlit§ APUOPER EQU PROCIO EQU APUNONLN EQU ftPFEAT EQU CPINITD EQU 69B APSTAT2 DC Jlit§ CPftCHLK EQU CPPTLBR EQU 69C CPTERMLK DC
69D CPFRELK DC
69E FRLKPROC DC
69F CPFRESW DC 6AO AftCHAREA DC
6A4 SHRLKCNT DC
6A8 PROBSTRT DS F'O' in EftSPEND --X'80'-- X'40' X'20' X'10' X'08' X'Ol' F'O' in EMSREC -X'80'- X'40' X'20' X'10' X'08' FlO' in XCPEND X'40' X'20' X'10' H'O' H'O' H'O' 6X APSTATUS X'OO' in APSTATl --X'80'-- X'40' X'20' X'10' X'Ol' X'OO' in APSTAT2 --x'"1o'-- X'02' X'OO' X'OO' X'OO' X'OO' F'O' F'O' lD Field Description, Contents, fteaning Emergency signal pending flags
Quiesce pending
Extend pending
Synchronization pending
Shutdown pending
Highcrder 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 Frocessor P*8 Logical address of this processcr P*9 Logical address of other prccessor
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 mcde ftultiprocessing feature is installed
System initialization complete Second flag byte Machine check processing pending
(for ECPS only) PTLE 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. DftKFRE must transfer execution to the
attached processor. Note that CPFRESW is in absolute PSA. Address of IMKMCH work area
Count of times CPSHRLK is set (used to clear CPSHRLK) Virtual machine time out queue at dispatch
76 IBM VM/370 Data Areas and Control Block Logic