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) 
3.14  MEMORY2 Test  
To execute the Expansion Test select 11 from the Diagnostic Test Menu, press Enter and  
follow the directions on the screen. The MEMORY2 Test contains four subtests that test the 
computer's. 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 Test Status 
screen displays while the test is executing. When the test is complete the Memory Test 
menu displays.  
If YES is selected for Test Loop on the Test Parameter menu, the Test Status screen 
displays while the test is executing. Press Ctrl + break to return to the Memory Test menu 
Memory Test2 is using burst transfer mode by cache memory . 
 
Subtest 01 
All one/All zero test 
This subtest performs pseudorandom data read/write. The data consists of “all 
ones”/”all zero” patterns produced by pseudorandom sequence generator. The 
test checks address error. 
FFFFFFFFFFFFFFFF0000000000000000 
0000000000000000FFFFFFFFFFFFFFFF 
Subtest 02 
Walking 1/Walking 0 test (Left) 
This subtest uses “running one”/”running zero” patterns. This test sequence 
allows also to checking system bus in maximum noise conditions. The 
following test sequence is written. 
7FFF7FFF7FFF7FFF8000800080008000 
BFFFBFFFBFFFBFFF4000400040004000 
After all the memory being tested is filled with the pattern, it is read in 
descanting   direction and compared with reference data. As the memory is 
read, the data is replaced with inverse test pattern. After all the memory is 
read and replaced with inverted pattern, it is read in descanting direction and 
compare with new reference data. As the memory is read, the data is replaced 
with next pattern, which is like first one shifted to right. 
Subtest 03 
Walking 1/Walking 0 test (Right) 
Tee test method is the same as Subtest2. However, the data to be used differs. 
80008000800080007FFF7FFF7FFF7FFF 
4000400040004000BFFFBFFFBFFFBFFF