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Toshiba M10 User Manual

Page 120

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3 Tests and Diagnostics

3.5 Memory Test

3-14

Satellite Pro M10 Series Maintenance Manual (960-431)

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.