3.5 Memory TestMemory Test
3 Tests and Diagnostics
Portege 2000 Maintenance Manual (960-333)
3-11
3.5 Memory
Test
To execute the Memory Test, select
2-MOMORY TEST
from the DIAGNOSTIC TEST
MENU, press
Enter
and follow the directions on the screen. The Memory test contains five
subtests that test the memory module. Move the highlight bar to the subtest you want to
execute and press
Enter
.
Subtest 01
Conventional Memory
This subtest writes data to conventional memory (0 to 640 KB). Then reads
and compares the result with the original data. The test address is displayed
each 4 KB.
Subtest 02
Protected Mode
NOTE
: The CONFIG.SYS file must be configured without extended memory manager
programs such as EMM386.EXE, EMM386.SYS or QEMM386.SYS. Also, the
HIMEM.SYS must be deleted from the CONFIG.SYS file.
This subtest writes constant data and address data then reads the new data and
compares the result with the original data.
Subtest 04
Cache Memory
To test the cache memory, a pass-through write-read comparison of ‘5A’ data
is run repeatedly to the test area (‘7000’:’Program’ size to ‘7000’:’7EEE’ (32
KB)) to check the hit-miss ratio (on/off status) for CPU cache memory.
Number of misses
<
Number of hits
→
OK
Number of misses
≥
Number of hits
→
NG
Summary of Contents for Portege 2000
Page 9: ...Chapter 1 Hardware Overview ...
Page 10: ...1 Hardware Overview 1 ii Portege 2000 Maintenance Manual 960 333 1 Hardware Overview ...
Page 30: ...1 Hardware Overview 1 7 AC Adapter 1 18 Portege 2000 Maintenance Manual 960 333 ...
Page 31: ...Chapter 2 Troubleshooting Procedures ...
Page 32: ...2 Troubleshooting Procedures 2 ii Portege 2000 Maintenance Manual 960 333 2 ...
Page 36: ...2 Troubleshooting Procedures 2 vi Portege 2000 Maintenance Manual 960 333 ...
Page 87: ...Chapter 3 Tests and Diagnostics ...
Page 88: ...3 Tests and Diagnostics 3 ii Portege 2000 Maintenance Manual 960 333 3 ...
Page 147: ...Chapter 4 Replacement Procedures ...
Page 148: ...4 Replacement Procedures 4 ii Portage 2000 Maintenance Manual 960 333 4 ...
Page 215: ...Appendices ...
Page 216: ...Appendices App ii Portege 2000 Maintenance Manual 960 333 ...
Page 222: ...Appendices App viii Portege 2000 Maintenance Manual 960 333 ...
Page 228: ...Appendices Apx A Handling the LCD Module A 6 Portege 2000 Maintenance Manual 960 333 ...
Page 264: ...Appendices Apx E Key Layout E 2 Portege 2000 Maintenance Manual 960 333 ...
Page 266: ...Appendices Apx F BIOS KBC EC Update F 2 Portege 2000 Maintenance Manual 960 333 ...
Page 268: ...Appendices Apx G Reliability G 2 Portege 2000 Maintenance Manual 960 333 ...
Page 270: ...Appendices Apx H Key FD H 2 Portege 2000 Maintenance Manual 960 333 ...