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Chapter 5. Problem Determination, Diagnostics, and Recovery   351
1st ed., 6/30/04 - 312579601
 
DSP Trace Entry 
event-type 
= ‘D’  
event-code 
TTEWORD1
TTEWORD2
TTEWORD3
= dispatch priority 
= R15
= R12
= R13
Return from SVC Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘W’ 
= dispatch priority
= R15
= R0
= R1
SIO Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘S’ 
= device address
= IOB address
= CAW
= Reserved
I/O Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘I’ 
= device address
= IOB address
= CSW (bytes 0-3)
= CSW (bytes 4-7)
SVC Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘V’ 
= SVC number
= R15
= R0
= R1
PGM Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘P’ 
= program interrupt code
= R15
= R12
= R1
MCK Trace Entry 
event-type 
event-code
TTEWORD1
TTEWORD2
TTEWORD3
= ‘M’ 
= machine check interrupt code (bytes 0-3) 
= machine check interrupt code (bytes 4-7)
= external damage code
= failing storage address