Toshiba Satellite 1400 Series, Maintenance Manual

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3.5 Memory Test 3 Tests and Diagnostics
Satellite 1400/2400 Maintenance Manual (960-364/365)
3-11
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 test
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.