Digital Equipment DECstation 5000/100 Series, Maintenance Manual

Page: 97 / 392

How to Troubleshoot When a Console Exception Occurs
Interpret the R3000 register values listed in the console
exception message to determine what caused the exception.
Console exception error messages have the form
? PC:
address
? CR: cause
? SR: status
? VA: virtual address
? ER: error address
? MER:
memory error
address represents the address of the exception instruction.
cause represents the value in the cause register.
status represents the contents of the status register.
virtual address
represents the virtual address of the
exception.
error address represents the contents of the error address
register.
memory error represents the value in the memory error
register.
For an explanation of the registers that appear in console
exception messages, refer to Appendix E.
Example: R4000 Console exception message
This is a sample
R4000 console exception message:
? PC: 0x451<vtr=nrml>
? CR: 0x810<ce=0,ip4,exc=AdEL>
? SR: 0x30030000<cu1,cu0,cm,ipl=8>
? CGF: 0X10410243<SB=8W,SC=Y,IC=8K,DC=8K,IB=4W,DB=4W,K0=CNC>
? VA: 0X00000000
?
?MB_CS:
0X00008000<MSK=0,EE,ECC=0>
?MB-INT: 0X001F0000<>
Identifying Failed FRUs 4–19