Motorola MVME167P Installation And Use Manual page 49

Diagnostic Facilities
If you are in the debugger directory, you can switch to the diagnostic
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directory with the debugger command Switch Directories (SD). The
diagnostic prompt 167-Diag> appears. Refer to the Debugging Package
for Motorola 68K CISC CPUs User's Manual for complete descriptions of
the diagnostic routines available and instructions on how to invoke them.
Note that some diagnostics depend on restart defaults that are set up only
in a particular restart mode. The documentation for such diagnostics
includes restart information.
http://www.motorola.com/computer/literature 2-13