IBM 4381 Manual page 114

Machine Check
Mode Mask Bit(s) Interruption Type and Cause
Condition
S/370 PSW 13 System Recovery
Repressible
370-XA andR • Error during instruction execution
corrected by instruction retry
• Double-bit processor storage error
corrections
• Reconfiguration without loss of data
(channel data buffer or high-speed
buffer reconfiguration)
S/370 PSW 13 Interval Timer Damage Repressible
andE
S/370
PSW 13 Timing Facilities Damage Repressible
370-XA andE
•
Time-of-day clock error
orT
•
Clock comparator error
•
CPU timer error
S/370
PSW 13 External Damage
Repressible
andE
•
Uncorrectable processor storage or
protect key error during an I/O
operation
•
Channel not operational condition
• Channel control failure condition
S/370 PSW 13 Degradation Repressible
370-XA andE
•
Malfunctioning bit turned on in the
high-speed buffer directory
370-XA PSW 13 Channel Report Pending
Repressible
and C • One or more channel report words
are available
370-XA PSW 13 Channel Subsystem Damage Repressible
• Uncorrectable double-bit error in
channelorsubchanneldatain
auxiliary storage
S/370
PSW 13 System Damage Exigent
370-XA
•
Severe damage for any unretryable
privileged instruction .
An uncorrectable processor storage
error occurred in the auxiliary
storage area except in the CPU timer
or clock comparator area or for
System/370-XA mode in channel or
subchannel data in auxiliary storage
Figure 17 (Part 1 of 2). 4381 Processor machine check interruptions
Section 60: Reliability, Availability, and Serviceability (RAS)
105