Toshiba Magnia Z500 - Manual (Page 81)

HW Diagnostics
Items of HW Diagnostics
79
Details of Test Items and Error Log Information
The following are Test items and Error log information:
[01. MEMORY TEST]
To run the memory.
[01. Conventional memory]
This test writes data to conventional memory (0 to 640 KB),
then reads the new data and compares the result with the test
data.
[02. Expansion memory]
This test writes constant data to all the memory area, then reads
the data and compares it with the test data.
[03. RAM refresh]
This test writes test data to the memory, then reads the data
after one refresh cycle and compares the data with the test data.
[04. Stress test]
This test writes data to the protected mode memory (from 1
MB to maximum), then reads the data and compares it with the
write data.
NOTE: The [02. Expansion memory], [03. RAM refresh] and
[04. Stress test] test all memory area. When the capacity of
mounted memory is large, the tests may take a few hours.
MEMORY TEST (RAM) Error log
Status Error name Meaning
01 PARITY ERROR Parity error
02 PROTECTED MODE NOT
CHANGE ERROR The Shift to the protected mode failed
FF DATA COMPARE ERROR Data comparing error