Program Status Word
o
Channel Masks 0-5 PSW Format in BC Mode 100000000 40 32 40 PSW Format in EC Mode
Appendix D. Formats
Interruption Code
16 31 I nstruction Address
63 000 0 0 0 0 0 24 31 I nstruction Address
63
Appendix D. Formats 271

Page of GA22-7000-4 Revised September 1, 1975
By TNL: GN22-0498
Assignment of Control Register Fields
Word Bits Name of field 0 0 Block-Multiplexing Control 0 1 SSM-Suppression Control 0 2 TOO Clock Sync Control 0 8-9 Page-Size Control 0 10 Unassigned, must be zeTO 0 11-12 Segment-Size Control 0 16 Malfunction-Alert Mask 0 17 Emergency-Signal Mask 0 18 External-Call Mask 0 19 TOD-Clock-Sync-Check Mask 0 20 Clock-Comparator Mask 0 21 CPU-Timer Mask 0 24 Interval-Timer Mask 0 25 Interrupt-Key Mask 0 26 External-Signal Mask 0-7 Segment-Table Length
8-25 Segment-Table Address
2 0-31 Channel Masks
8 16-31 Monitor Masks
9 0 Successful-Branching Eve!nt Mask
9 1 Instruction-Fetching-Event Mask
9 2 Mask
9 3 GR-Alteration-Event Mask
9 16-31 PER1 General Register Masks 10 8-31 PER Starting Address
11 8-31 PER Ending Address
14 0 Check-Stop Control
14 Synchronous-MCEL 2 Control
14 2 I/O-Extended-Logout Control
14 4 Recovery-Report Mask
14 5 Degradation-Report Mask
14 6 External-Damage-Report Mask
14 7 Warning Mask
14 8 Asynchronous-MCEL Control
14 9 Asynchronous-fixed-Log Control
15 8-28 MCEL Address
Explanation:
The fields not listed are unassigned.
Associated With
Block-Multiplexing SSM Suppression
Multiprocessing
Dynamic Addr. Translation
Dynamic Addr. Translation
Dynamic Addr. Translation
Multiprocessing
Multiprocessing
Multiprocessing
Multiprocessing
Clock Comparator
CPU Timer. Interval Timer
Interrupt Key
External Signal Dynamic Addr. Translation
Dynamic Addr. Translation
Channels
Monitoring
Program-Event Recording
Program-Event Recording
Program-Event Recording
Program-Event Recording
Program-Event Recording
Program-Event Recording
Program-Event Recording
Machine-Check Handling
Machine-Check Handling 1/0 Extended Logout
Machine-Check Handling
Machine-Check Handling
Machine-Check Handling
Machine-Check Handling
Machine-Check Handling
Machine-Check Handling
Machine-Check Handling
Except for bit 10 of control register 0, the initial value of unassigned register positions is unpredictable.
1 PER rneans program-event recording.
2 MCEl. means machine-check extended logout.
3 Bit is set to one, with all other bits set to zero, thus yielding a decimal byte address of 512.
272 System/370 Principles of Operation Initial Value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
1 0 0 0 1 0 0 0 512
3