I IWordlBits Name of Field I o
o
o
o
o
o
o
o
o
o
o
o
o
o
o I 1 I 1 I I I 2 I I I I o
1
2
8-9 10 i1-12 16
17
18
19 20 21 24 25
26
Block-Multiplex Mode SSM Suppression TOD Clock Synchronous Ctrl.
Page Size
1 Reserved Segment size
i
Malfunction Alter Mask Emergency Signal Mask External Call Mask TOD Synchronous Check Mask Clock Comparator Mask
Processor Timer Mask Interval Timer Mask
Interrupt Key Mask
External Signal Mask 0-7 ISegment Table Length 8-25lSegment Table Address I 0-31lChannel Masks I I I I Associated with
Block-Multiplex Control
Extended Control
Attached Processing
Dynamic Addr. Translation
Dynamic Addr. Translation
Dynamic Addr. Translation
Attached processing
Attached processing
Attached processing
Attached Processing
Clock Comparator
Processor Timer
External Interruption
External Interruption
External Interruption IDynamic Addr. Translation IDynamic Addr. Translation I 11/0 Interruptions I I I I 6 0 VM Assist IHardward Assist I I 6 VM Problem State IHardware Assist I 6 2 ISK & SSK IHardware Assist I 6 3 5/360 or 5/370 instructions IHardware Assist I 6 4 Virtual SVC Interrupts IHardware Assist I 6 5 Shadow Table Fixup IHardware Assist I 6 6 CP Assist IHardware Assist I 6 7 Virtual Interval Timer IHardware Assist I 6 8-28 Real address of VM pOinter IHardware Assist
list I 8 I 16-31lMonitor Masks I I I Monitoring I I 9 I 0-3 IPER2 Event Masks IProgram-Event Rpcording IProgram-Event Recording I 9 116-311PER GR Alteration Masks I I 10 I 8-311PER Starting Address I I I , IProgra.-Event Recording I Initial Value 1
o
o 10 o 00 1
1
1
1
1
o
1
1
o ISet by CPa Value varies with the tYFe of virtual machine.
FFFFFFFF. Set to
zero on the attached
processor in
attached processor
systems Value depends
upon virtual machine Value depends
upon virtual machine Value depends
upon virtual machine Value depends
upon virtual machine Value depends
uFon virtual machine Value depends
upon virtual machine Value depends
upon virtual machine Value depends
upon virtual machine Value depends
upon virtual machine IValue depends on I upon virtual machine IValue depends upon I virtual machine. IValue depends upon I virtual machine. IThe fields not listed are unassigned. IThe initial value of unassigned register positions is unpredictable. I 11 I ,2 The initial value varies depending upon whether virtual storage is supported in the
virtual machine.
PER means program-event recording.
, I .J Figure 46. Centrol Register Assignments (Part 1 of 2)
346 IBM VM/310 System programmer's Guide

!' "'1"1'.-.-..-.:11"'':'.1-_ I"UL.UID..L.l.O::> Associated Initial Value .... T ____ + l1Q.tHC V.L ..L ...L."c;..A-U t 11
14
14
14
14
14
14
14
14 8-311PER Ending Address­ I 0 ICheck-Stop Control
1 I Synchronous MCEL3 Control
2 11/0 Extended Logout Control
4 IRecovery Report Mask 5 IDegradation Report Mask
6 IExternal Damage Report Mask
7 IWarning Mask 8 IAsynchronous MCEL Control iProgram-Event Recording I I Machine-Check I Machine-Check I Channel-Check I Machine-Check I Machine-Check I Machine-Check I Machine-Check
,Machine-Check
14 9 IAsynchronous Fixed log Ctrl.IMachine-Check Handling
Handling
Handling
Handling
Handling
Handling
Handling
Handling
Handling I 15 I I 8-281MCEl Address I I :
'Machine-Check Handling , ,Value depends upon I virtual machine. ,Value depends upon I machine check I handler for the I virtual machine. I , , I , ,Peints to extend I/O Ilogout area IThe fields not listed are unassiqned. ,The initial value of unassigned register positions is unpredictable. , 1
3 MCEl means machine-check extended logout. , Figure 46. Control Register Assignments (Part 2 of 2) Appendix A: system/370 Information 347
,
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