!' "'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
,
!

I ISystem Mask I Key I EMiP I 0 cc I Program I 0 II I I I I I Mask , II L---- __________________________________________________________________ o 7 8 11 12 15 16 17 18 19 20 23 24 311 I o Instruction Address II L- ______________________________________________________________________ 32 33 63
The fields of the PSi are:
o
1
2-4
5
6
7
8-11
12
13
14
15
16-17
18-19 24-32
33-63
Figure 47. Must be zero. PER (Program Event Recording) enabled. Must be zero.
Address translation. Summary I/O Summary extension.
The protection key determines if information can be stored
or fetched from a particular location.
Extended control mode.
The machine check flag is set to 1 if machine check
interruptions are enabled.
The wait state flag is set to 1 when the CPU is in the wait
state.
The problem state flag is set to 1 when the CPU is
operating in the proble. rather than the supervisor
state. Must be zero.
The condition code reflects the result of a previous
arithmetic, logical, or I/O operation.
The program .ask indicates whether or not various program
exceptions are allowed to cause program interrupts. Must be zero.
The instruction address gives the location of the next
instruction to be executed for program interrupts or of
the instruction last executed for external interrupts.
The Extended Control PSi (Program Status Word) 348 IBM VM/370 System Programmer's Guide