Digital Equipment DEC 3000 600 AXP, Информация о сервисе

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Memory Diagnostic
The system performs the memory diagnostic when you:
• Power up the unit.
• Enter console mode and select the memory diagnostic.
During power-up, the memory diagnostic
• Checks the previous memory configuration
• Tests enough memory to load the secondary boot (APB.EXE
for OpenVMS)
The only time a complete memory test is performed during
power-up is when the memory configuration has changed.
In console mode, the diagnostic exercises all memory except for
the first 2 MB. The first 2 MB of memory are reserved and tested
by the serial ROM (SROM) code before the console is loaded.
The diagnostic isolates faults to the FRU level.
Running
Memory
Diagnostics To run the memory diagnostic and subtests, use the TEST
command.
>>> T[EST] {device name} [subtest]
Return
Subtests Table 9–9 lists memory diagnostic subtests.
Table 9–9 Memory Diagnostic Subtests
Subtests Description
ALL Performs all tests.
CELL Memory cell test.
ADDR Address lines and refresh test.
LLSC ldx_l/stx_c
INIT Sets all memory to zero.
? Provides a list of available diagnostics.
The subtests have default values for the starting and ending
address and other values. You can modify the values. The
diagnostic uses the default values if the values you enter are
9–12