Service manual

3
The autosizer builds a table of devices for VAX/DS that can be
printed by using the SHOW DEVICE/BRIEF command at the DS>
prompt. The command lists system devices, similar to the SHOW
CONFIGURATION command in console mode.
4
When preparing to run a diagnostic, the SELECT ALL command
selects all devices listed in
3
and the SET TRACE command enables
printing of test numbers and names when the diagnostic runs. If you
run another diagnostic after this one and you want the tests traced,
you will need to issue the SET TRACE command again. The SET
EVENT 2 command disables some informational messages printed by
this particular diagnostic.
5
An external halt causes VAX/DS to print the contents of the program
counter, the processor status longword, and the stack pointer. Since
VAX/DS was called from console mode, the console prompt is returned.
In a <REFERENCE>(rigel) system an external halt can, in some cases,
cause an unexpected trap or interrupt through SCB vector 60. The
remainder of this example shows how to avoid this condition by using
the CLEAR EXCEPTION command and what happens if the condition
is not cleared by the console. The condition does NOT apply to the
<REFERENCE>(hyperion).
Diagnostics 2–39