Toshiba M200-ST2002 Maintenance Manual - Page 117

3.6 Memory Test 3 Tests and Diagnostics Subtest 05 Subtest 06 L2 Cache Memory To test the L2 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 L2 cache memory. Number of misses < Number of hits → OK Number of misses ≥ Number of hits → NG Stress This test prepares the write/read buffer (size:1b30h) and produce write date in the write buffer. The write data is written in the area larger than 1 MB and read into the read buffer then repeated to compare until maximum size. Test data: ffh, ffh, ffh, ffh, ffh 00h, 00h, 00h, 00h, 00h ffh, ffh, ffh, 00h, ffh 00h, 00h, 00h, ffh, 00h 00h, ffh, ffh, ffh, ffh 00h, 00h, 00h, 00h, aah These data are generated repeatedly by 1b30h size. Portege M200 Maintenance Manual (960-457) 3-17