Toshiba Satellite M20 Maintenance Manual page 108

3.6 Memory Test
1. Bit Stuck High Test
Data pattern: Every bit is '1' (Each bit is high)
2. Bit Stuck Low Test
Data pattern: Every bit is '0'(Each bit is low);
3. Checker Board Test
Data pattern: Lo-byte and hi-byte are composed with 0101(0x5) and 1010
(0xA);
4. CAS Line Test
Data pattern: Lo-byte and hi-byte are composed with 0000 (0x0) and
1111(0xF);
5. Incremental Test
Data pattern: A series of increasing data from 0 by adding 1 each time;
6. Decrement Test
Data Pattern: A series of decreasing data from the maximum (e.g. 0xFFFF) by
subtracting 1 each time;
7. Incremental / Decrement Test
Data Pattern is a series of data whose low byte is increasing data from 0x00
and high byte is decreasing data from 0xFF.
Subtest 03 Extended Pattern
In addition to the above pattern test with the memory, there are Read/Write Cycle
test and Read Cycle Test for the extended memory.
Below is the parameter dialog window of the extended pattern test.
Satellite M20 Maintenance Manual
3 Diagnostic Programs
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