User`s guide

DWMBB/A Module Registers
Responder Error Address Register (AREAR)
Responder Error Address Register (AREAR)
AREAR logs the failing address of an I/O write, read, or IDENT from an XMI
commander node directed to the DWMBB or the VAXBI. AREAR is loaded
when the DWMBB ACKs the XMI’s C/A cycle.
AREAR is locked when the DWMBB is unable to complete the requested
operation because of a detected error. The error bits that lock this register
and the Responder Failing ID (AESR<25:20>) and the Responder Failing
Command (AESR<19:16>) follow:
• Write Sequence Error (WSE), XBER<22>
• Read/IDENT Data NO ACK (RIDNAK), XBER<21>
• PMR Uncorrectable ECC Error, AESR<13>
• PMR Correctable ECC Error, AESR<12>
• Internal Error, AESR<7>
• I/O Write Failure, AESR<6>
• IBUS I/O Read Data Parity Error, AESR<0>
ADDRESS
XMI nodespace base address + 0000 000C
3
1
3
0
2
9 0
Responder Failing Address
msb−p104−89
Responder Failing Length (RFLN)
bits<31:30>
Name: Responder Failing Length
Mnemonic: RFLN
Type: RO, 0
RFLN loads XMI D<31:30> during the cycle that the DWMBB accepts
the C/A cycle from an XMI commander. It locks only if the transaction
fails and unlocks when all the error conditions clear.
3–54