Toshiba Satellite M20 Maintenance Manual page 105

3 Diagnostic Programs
This test item is to check whether the CPU supports Speedstep function
according to the change of the CPU work frequency in Maximum
Performance mode and Battery Optimized mode.
Below is the parameter dialog window of CPU Speedstep test item:
Speed Change Comparison—When 'No' is chosen, system only reports
the CPU speed at Maximum Performance mode and Battery Optimized
mode. Otherwise, it will compare the CPU speed at Maximum Performance
mode with that at Battery Optimized mode. Whether the difference
between the two speeds is greater than the value specified in 'Expected
Minimum Speed Change', system will report 'PASS', otherwise 'FAIL'.
Expected Minimum Speed Change—Specify the minimum change range
of CPU speeds under AC and DC power supply.
7. MMX
The test item is to confirm whether the CPU supports MMX instructions.
Subtest 02 Board
1. DMA Controller
This test item is to check whether the DMA controller works normally.
2. Interval Timer
This test item is to check whether the Interval Timer (18.2Hz, 55ms) works
normally.
3. Clock/Calendar
This test item is to check whether the system clock/calendar works
normally.
4. Speaker
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3.5 System Test
Satellite M20 Maintenance Manual