Test Program for Field.
Satellite U400 and Satellite Pro U400 Tests and Diagnostics Manual
47
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.
Summary of Contents for Satellite Pro U400 Series
Page 110: ...Test Program for Field Satellite U400 and Satellite Pro U400 Tests and Diagnostics Manual 17 ...
Page 168: ...Replacement Procedures Satellite U400 Satellite Pro U400 PORTEGE M800 Maintenance Manual 4 iv ...
Page 276: ...Pin Assignment 36 Satellite U400 Satellite Pro U400 PORTEGE M800 Maintenance Manual ...
Page 302: ...Wiring Diagrams F 2 Satellite U400 Satellite Pro U400 PORTEGE M800 Maintenance Manual ...
