Toshiba PORTEGE Z830 Satellite Z830 Maintenance Manual page 128

Tests and Diagnostics
To test the cache memory, a pass-through write-read comparison of '5Ah'
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 04 Stress
Write/Read buffer (1 size = B30h) is prepared in the conventional memory.
The data is made in the Write Buffer, the data in Write Buffer is written in the
area of address of 1MB or after. The data is red in the Read Buffer and data is
compared in area up to the maximum size.
Data: FFh, FFh, FFh, FFh, FFh, 00h, 00h, 00h, 00h,
3-24 [CONFIDENTIAL])
FFh, FFh, FFh, 00h, FFh, 00h, 00h, FFh, 00h,
00h, FFh, FFh, FFh, FFh, 00h, 00h, 00h, AAh
PORTEGE Z830 Satellite Z830 Series Maintenance Manual (960-883)