AT&T 3B2 Off-Line Diagnostic Manual page 559
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Also See for 3B2:
- Maintenance reference manual (422 pages) ,
- Operation manual (415 pages) ,
- Manual (54 pages)
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Phase Descriptions
Test Number:
5
Function:
This test ensures that the VCACHE card correctly responds to half word miss
write accesses.
Procedure:
In virtual mode, write pattern to memory using half word accesses with the
VCACHE card enabled. Disable the VCACHE card and change the memory
test pattern. Enable the VCACHE card and verify that the pattern read is the
second pattern.
Hardware Tested:
The VCACHE card is tested.
Data Returned:
The failing test number, the failing address, the expected pattern, and the
pattern are returned.
Notes:
None
Test Number:
6
Function:
This test ensures that the VCACHE card correctly responds to byte hit write
accesses.
Procedure:
In virtual mode, write pattern to memory using word accesses with the
VCACHE card enabled. This should fill the VCACHE card. Then fill memory
with second test pattern using byte accesses. Disable the VCACHE card and
verify that the second pattern was written into memory. Fill memory with the
third test pattern using word accesses. Enable the VCACHE card and verify
that the pattern read is the second pattern.
Hardware Tested:
The VCACHE card is tested.
Data Returned:
The failing test number, the failing address, the expected pattern, and the
pattern are returned.
Notes:
None
Test Number:
7
Function:
This test ensures that the VCACHE card correctly responds to half word hit
write accesses.
Procedure:
In virtual mode, write pattern to memory using half word accesses with the
VCACHE card enabled. This should fill the VCACHE card. Then fill memory
with second test pattern using half word accesses. Disable the VCACHE card
and verify that the second pattern was written into memory. Fill memory with
the third test pattern using half word accesses. Enable the VCACHE card and
verify that the pattern read is the second pattern.
Hardware Tested:
The VCACHE card is tested.
Data Returned:
The failing test number, the failing address, the expected pattern, and the
pattern are returned.
Notes:
None
VIRTUAL CACHE DIAGNOSTICS 13-5
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