Toshiba M40 - Manual (Page 104)

3 Diagnostic Programs 3.6 Memory Test
38 EQUIUM M40/M45/ Satellite M40/M45 Maintenance Manual
This test item is to check whether the memory could be correctly accessed
with randomized memory address and a series of incremental data.
Subtest 10 Data Bus Test
This test item is to check whether the data bus works normally.
Subtest 11 Memory Speed Test
This test item is to check the data-transferring rate for the cache memory and the
system memory.