Toshiba A1 Manual Do Utilizador

To execute the Memory Test, select 

 from the DIAGNOSTIC TEST MENU, press 

 

and follow the directions on the screen.  Move the highlight bar to the subtest you want to 
execute and press 

. 

Subtest 01 

Conventional Memory 

This subtest writes a 256-byte unit of constant data to conventional memory 
(0 to 640 KB).  Then reads the new data and compares the result with the 
original data. The content of the memory to be tested is saved before the test 
and it is restored after the test. 

The constant data is FFFFh, AAAAh, 5555h, 0101h and 0000h.  

Subtest 02 

Protected Mode 

This subtest writes constant data (FFh, AAh, 55h, 00h) and address data 
(FFFFh, FFFEh, … 0000h) to from 1MB to the maximum MB then reads the 
new data and compares the result with the original data and executes the 
address bit test (in 64KB unit. FFh, FEh, …).  

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’ 
(32KB)) 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 → Fail