User`s guide

DWMBB/A Module Registers
Error Summary Register (AESR)
bit<5>
Name: BCI AC LO
Mnemonic: None
Type: R/W1C, 1
The BCI AC LO bit sets when VAXBI power falls below specifications,
as indicated by an asserted BCI AC LO L signal (asserted = one).
The DWMBB issues an IVINTR with WRT ERROR INT set in the
Type field when BCI AC LO asserts, if Enable IVINTR Transactions
(AIMR<31>) is set, so that software can determine the cause of this
IVINTR transaction. Software then clears BCI AC LO as part of the
interrupt service routine that executes as a result of the IVINTR.
The following conditions cause BCI AC LO to set:
• An XMI power-up sequence.
• Software sets NRST (XBER<30>) to initiate a node reset.
• Software sets Control Reset (ACSR<30>) to initiate a diagnostics
node reset.
• VAXBI power falls below specifications, causing a VAXBI power
failure.
• Software causes a VAXBI node reset to execute a remote booting
routine.
The bit is cleared by self-test at power-up.
bit<4>
Name: IBUS DMA-A Data Parity Error
Mnemonic: IBUS DMA-A DATA PE
Type: R/W1C, 0
IBUS DMA-A Data Parity Error sets when the DWMBB/A module
detects a parity error on the IBUS when the DWMBB/B module was
loading a DMA-A data buffer location. The DWMBB issues an IVINTR
with WRT ERROR INT set in the Type field when IBUS DMA-A Data
Parity Error asserts, if Enable IVINTR Transactions (AIMR<31>) is
set.
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