Failure Register - Compaq AlphaServer DS20 Service Manual

3.8

Failure Register

2
This register, on the I C bus, is locked when there is a power supply or fan
failure. Together with the Function Register, fan and power supply failures are
identified and reported to the operating system thus notifying it that the system
will shut down in 30 seconds. The results of reading this register are displayed by
the SRM show power console command.
2
I C Bus Address
Access
7 6 5 4 3
1 1
PS1_PRESENT_L/FAN TRAY
C/SFAN1_L
Reserved
PS0_PRESENT_L
3-16 AlphaServer DS20 Service Manual
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2 1 0
1 1
Reserved
C/SFAN0_L
Reserved
Reserved
PK1420-99