Toshiba T3100e - Page 64

File No.
960-010
3.5 MEMORY TEST
Subtest 01
Subtest 02
Subtest 03
Subtest 04
Subtest 05
RAM constant data (in real mode)
This subtest writes constant data to memory, then
reads and compares it with the original data.
The constant data is FFFFH, AAAAH, 5555H, 0101H,
and OOOOH.
RAM address pattern data (in real mode)
This subtest creates an address pattern by XORing
(Exclusive-ORing) the address segment and address
offset, writes the address pattern into the
segment address and the offset address, then reads
and compares it with the original data.
RAM refresh (in real mode)
This subtest writes 256 bytes of constant data to
memory, then reads and compares it with the
original data. The constant data is "AAAAH" and
"5555H". There is a delay between the write and
the read operations.
Protected mode
This subtest writes fixed data and address data to
memory (addresses 100000H to the max.) in
protected mode, then reads and compares it with
the original data.
Extended memory
For the memory located at the address lOOOOOH
or more, the test program writes data, reads
it back, and compares in the microprocessor's
protected mode. The data patterns used by
the program are one address pattern and four
constant (i.e. fixed) data patterns. Address
pattern data is a data generated by some
logical operation with its memory address
information. Four constant data patterns are
FFFFH, AAAAH, 5555H, and OOOOH.
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