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3.5 Memory Test 3 Tests and Diagnostics
TECRA M1 Maintenance Manual (960-436) 3-15
Subtest 04 Cache Memory
To test the cache memory, a pass-through write-read comparison of ‘5A’ data is
run repeatedly to the test area (‘7000’:‘Program’ size to ‘7000’:‘7FFF’ (32 KB))
to check the hit-miss ratio (on/off status) for CPU cache memory. One test takes 3
seconds.
Number of misses < Number of hits → OK
Number of misses ≥ Number of hits → Fail
Subtest 05 L2 Cache Memory
To test the L2 cache memory, a test similar to that for the cache memory is
performed.
Subtest 06 Stress
The conventional memory is provided with a write/read buffer (size 1b30 h) and
creates write data in the write buffer. Subsequent to 1 MB, the data is written in the
write buffer and is read into the read buffer, followed by a data comparison up to
the maximum memory size.