Testing Memory

When you use the memory testing routine, the system tests the number of megabytes of memory specified in the NVRAM parameter selftest-#megs. (See Chapter 3, Setting Configuration Parameters, for information about NVRAM parameters.) One megabyte of memory is tested as the default. If either the hardware diagnostic switch (if the system has one) or the NVRAM parameter diag-switch? is enabled, all the memory is tested.

To test memory, type:

ok test /memory 
Testing 16 megs of memory at addr 4000000 11
ok 

In the preceding example, the first number (4000000) is the base address of the testing, and the following number (11) is the number of megabytes to go.

There will be a delay while the PROM tests the system. If the system fails this test, you see an error message.