Pchip System Error Register (Serror; Pchip System Error Register - Compaq AlphaServer ES45 Service Manual

D.14 Pchip System Error Register (SERROR)
This register is used for logging system errors.
When system error bits <4, 2:0> are set, this entire register is frozen. Only the
NXIO bit and the LOST bit can be set after that. All other values will be held
until bits <2:1> are clear. When an error is detected and one of bits <2:1> is set,
the associated quadword address, CAP bus command, and syndrome is captured
in bits <63:16> of this register. The NXIO bit does not log any address
information, and does not lock the register.
Table D–13 Pchip System Error Register
Field Bits
SYN <63:56>
CMD <55:54>
SOURCE <53:52>
Type Init Description
RO 0 ECC syndrome of error
RO 0 Transaction type
Value
00 DMA read
01 DMA RMW
10 SGTE read
11 Reserved
RO 0 Source bus
Value
00 GPCI
01 APCI
10 AGP HP
11 AGP LP
Command
Command
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Registers D-29