Toshiba A105 S4064 Maintenance Manual - Page 120

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 Addre ss 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