Toshiba PRO L600 Manual Do Utilizador

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Test Program for Field. 
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)
 
 
3.11  Cache Memory Test 
To execute the Cache Memory Test select 08 from the Diagnostic Test Menu, press Enter 
and follow the directions on the screen. The Cache Memory Test contains eight subtests that 
test the computer's cache memory. Move the highlight bar to the subtest you want to execute 
and press Enter
 
NOTE: If NO is selected for Test Loop on the Test Parameter menu, the screen will 
remain blank while the subtest is executing. When the test is complete the Cache Memory 
Test menu displays. 
If YES is selected for Test Loop on the Test Parameter menu, the Test Status screen 
displays while the subtest is executing. Press Ctrl + break to return to the Cache Memory 
Test menu. 
 
Subtest 01 
Constant Data Test 
This subtest reads the contents of cache memory and saves it into RAM. The 
subtest then writes constant data (FFFFH, AAAAH, 5555H, 0101H, 0000H), 
reads the new data and compares the result with the original data pattern. The 
original cache memory content is then restored to the cache memory. 
Subtest 02 
Address Pattern Test  
This subtest reads the contents of cache memory and saves it into RAM. The 
subtest then writes address data patterns (0000H, 0001H, 0002H, through 
3FFDH, 3FFEH, 3FFFH), reads the new data and compares the result with the 
original data. The original cache memory content is then restored to the cache 
memory. 
Subtest 03 
Increment/Decrement Test  
This subtest reads the contents of cache memory and saves it into RAM. The 
subtest then writes the increment data (00H, 01H, 02H, through FDH, FEH, 
FFH), reads the new data and compares the result with the original data. After 
comparing the incremental data, decrement data (FFH, FEH, FEH, through 
02H, 01H, 00H) is written and the new data is read and compared with the 
original data. The original cache memory content is then restored to the cache 
memory.