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MAINTENANCE
.......
---------·- ·--------------·--·-----·--·-·----·--·--·-····--·-
???Error Test n subtest n problem
problem description
No expected/received data
(Or)
Expected · nnnnnnnn
Received · nnnnnnnn
Figure 3·3:
CPO Diagnostic Error Message Format
If
the
CPU
fails,
replace
the
DAP
module
and
re-run
the
diagnostic.
If
the
CPU
fails
again, replace the MCT module.
·~
(Also see the Troubleshooting Flow, Table 3-11.)
3.2.3
Memory Diagnostic
The Memory diagnostic (EHXMS) is run to isolate a
~.aili.n9~·
mem.£..(1
module
when
the
operating system detects memory er ruts or-·when'
intermittent program failures indicate possible memory
problems.
The tests are described in Table 3-3.
Before running the Memory diagnostic, the CPU
diagnostic
should
be run to verify CPU operation.
Table 3·3:
Memory Diaqnostic Tests
+-·-·+··············································-···········+
'TEST• DESCRIPTION
+····+···························································+
l
CSR FUNCTION TEST·· Determines the number of CSRs present
and
that they set and clear correctly when the Q22·bus is
initilaized.
2
MEMORY CONFIGURATION TEST ·· Verifies the size of
memory,
memory contiguity, and the CSR/memory
correlati~n.
3 MEMORY ADDRESS TEST PART 1
Memory addresses are written
and verified, one longword at a time.
4 MEMORY ADDRESS
TEST
PART
2 ·· Two's
complement
memory
addresses are written and verified, one word at a time.
3-9
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