Sun Microsystems SPARCstation 4 110 Service Manual page 170

D.1.7 test-memory
All of the system main memory will be tested if the system diag-switch?
parameter is true. If the diag-switch? parameter is false, this test uses the
selftest-#megs parameter in NVRAM to determine how much memory to test.
The default for the selftest-#megs parameter is 1, so only 1 megabyte of memory
is tested.
To change the default amount of memory tested using the selftest-#megs default
parameter, type this command:
ok setenv selftest-#megs 256
This sets the desired memory size to be tested to 256 megabytes.
When testing the installed memory alone, if diag-switch?=false, the
selftest-#megs parameter takes a default value of 1 megabyte (factory-defined
value) or the value you set using setenv shown in the example above.
Any whole number may be used up to 256, and if the number exceeds the amount of
installed memory, all the installed memory in the system is tested. When the test-
memory diagnostic is running, the number of megabytes being tested is displayed
and counted down to zero during the test.
See the OpenBoot Command Reference for a detailed description and step-by-step
instructions for the available FORTH Diagnostic tests.
D.2 Returning to the Old-Style Sunmon
Compatibility Mode Prompt
If you need to return to the > prompt from the FORTH Monitor, type old-mode at
the ok prompt.
ok old-mode
>
D-8 SPARCstation 4 Model 110 Service Manual • July 1996