Memory Module; Backup Memory; Cache Memory - Toshiba T4400SXC Maintenance Manual

Subtest 05 Memory Module
NOTE: To execute the this subtest, an optional memory card must be
installed in the T4400SXC.
This subtest is the same as subtest 04, and is used to test an optional memory
card. Memory modules for the T4400SXC are available in 2 MB, 4 MB, 8 MB
and 16 MB capacities.
When you select subtest five the following message appears:
Extended memory size (1:2 MB,2:4 MB,3:8 MB,4:16 MB) ?
Select the number that corresponds to the memory card size installed in the
T4400SXC.
Subtest 06 Backup Memory
This subtest writes constant data OOOOh, 5555h, AAAAh, and FFFFh to
memory from address E8000h to EFFFFh. The data is then read and compared
to the original data.
Subtest 07 Hard-RAM
NOTE: To execute this subtest, Hard-RAM must be set on the system.
The Hard-RAM subtest writes a word unit of constant data OOOOh, 5555h,
AAAAh, and FFFFh to memory from address EOOOOh to E7FFFh. The data is
then read and compared to the original data. This subtest also executes the
paging test for page data.
Subtest 08 Cache Memory
This subtest writes constant data AAh and 55h to the T4400SXC's cache
memory. Then it reads the data written to the cache memory and compares it
with the original data.
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