Compaq AlphaServer ES40 User Manual

E-2 Compaq AlphaServer ES40 Service Guide
E.1 Information for Isolating Failures
Table E–1 lists the information needed to isolate the failure. See
Appendix D for the register table for the Array Address Registers
(AARs). The failing address and failing data can come from a variety of
different locations such as the SROM serial line, SRM screen displays,
the SRM event log, and errors detected by the 21264 (EV6) chip.
Convert the address to data bits if the address is not on a 256 bit alignment
(address ends in a value less than 20 or address xxxxx20 or address xxxxxnn,
where nn is 1 through 1F). For example, using failing address 0x1004 and
failing data bit 8(dec), first multiply the failing address 4 by 8 = 32. Then add
32 to the failing data bit to yield the actual failing data bit 40. This conversion
yields the new failing information to be failing address 0x1000 and failing data
bit = 40(dec).
Table E–1 Information Needed to Isolate Failing DIMMs
Failing Address
Failing Data/Check bits
Array Address Registers
(AARs)
Memory Addresses
CSC 801.A000.0000
AAR0 801.A000.0100
AAR1
801.A000.0140
AAR2 801.A000.0180
AAR3 801.A000.01C0
DPR Locations Memory Addresses
DPR:80 801.1000.2000
DPR:82 801.1000.2080
DPR:84
801.1000.2100
DPR:86 801.1000.2180

Compaq AlphaServer ES40 Specifications

General

Brand	Compaq
Model	AlphaServer ES40
Category	Server
Language	English