Toshiba Satellite, M40 manual Subtest 02 Boards

3.5 System Test 3 Diagnostic Programs

Speedstep is a kind of energy-saving running mode that is supported by the Pentium III or above.

This test item is to check whether the CPU supports Speedstep function according to the change of the CPU work frequency in different power supply mode. In this test item, the user is requires to operate on the screen prompted.

Below is the parameter dialog window of CPU Speedstep test item:

Speed Change Comparison—When choosing ‘No’, system only reports the CPU speed at the different power supply. Otherwise, it will compare the CPU speed at High Speed and Low Speed. 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 High Speed and Low Speed.

7. MMX

The test item is to confirm whether the CPU supports MMX instructions.

Subtest 02 Boards

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

Satellite M40/M45 TECRA A4 Dynabook Vx/4 Maintenance

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