Digital Equipment AlphaServer 1200, Руководство по обслуживанию

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Power-Up 2-9
The Alpha chip built-in self-test tests the I-cache at power-up and upon reset.
Each CPU chip loads its SROM code into its I-cache and starts executing it. If the
chip is partially functional, the SROM code continues to execute. However, if the
chip cannot perform most of its functions, that CPU hangs and that CPU pass/fail
LED remains off. (In AlphaServer 1200 systems, the CPU pass/fail LED is not
visible.)
If the system has more than one CPU and at least one passes both the SROM and
XSROM power-up tests, the system will bring up the console. The console checks
the FW_SCRATCH register where evidence of the power-up failure is left. Upon
finding the error, the console sends these messages to COM1 and the OCP:
•
COM1 (or VGA): Power-up tests have detected a problem with your system
•
OCP: Power-up failure