3 Tests and Diagnostics 3.5 Memory Test
3-10 TECRA 9100 Maintenance Manual (960-347)
3.5 Memory Test
To execute the Memory Test, select 2 from the DIAGNOSTIC TEST MENU, press Enter
and follow the directions on the screen. Move the highlight bar to the subtest you want to
execute and press Enter.
Subtest 01 Conventional memory
This subtest writes a constant data to conventional memory (0 to 640 KB),
then reads the new data and compares the result with the original data.
Subtest 02 Protected Mode
NOTE: The CONFIG.SYS file must be configured without expanded
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 to extended memory
(maximum address 100000h) then reads the new data and compares the result
with the original data.
The constant data is FFh, AAh, 55h, and 00h.
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’:’7FFF’ (32
KB)) to check the hit-miss ratio (on/off status) for CPU cache memory. One
test takes 3 seconds.
Number of misses < Number of hits → OK
Number of misses ≥ Number of hits → Fail
Subtest 05 L2 Cache Memory
To test the L2 cache memory, a similar test to that for the cache memory is
performed.
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