3 Diagnostic Programs

3.6 Memory Test

 

 

 

The test item is to ensure that there is no open circuitry issue in memory chip. The parameter dialog window is the same as that in ‘Subtest 02 Pattern’.

Subtest 07 Memory Address

This test item is to check short and open issue on memory address lines.

Subtest 08 Refresh Test

This test item is to check whether the memory refresh works normally. The parameter dialog window is as follows:

Subtest 09 Cache Memory

The test item is to check whether the CPU internal cache memory could be accessed correctly.

Subtest 10 Random Memory

Random Memory test includes the following two test items: Randomize Test and Random Incremental Read/Write Test. The parameter dialog window is the same as that in ‘Subtest 03 Extended Pattern’.

1. Randomize Test

This test item is to check whether the memory could be correctly accessed with randomized data and randomized memory address.

2. Random Increment Read/Write

This test item is to check whether the memory could be correctly accessed with randomized memory address and a series of incremental data.

Subtest 11 Data Bus Test

This test item is to check whether the data bus works normally.

44 Satellite A100/A105 / TECRA A7 Maintenance Manual

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Toshiba PTA71, PTA70 Subtest 07 Memory Address, Subtest 08 Refresh Test, Subtest 09 Cache Memory, Subtest 10 Random Memory