Toshiba Portege M200 Maintenance Manual page 179

3.26 SETUP
8. Others
Whether or not you need to configure the computer with these options depends primarily on
the kind of software or peripherals you use.
(a) CPU Cache
Use this option to enable or disable the CPU cache.
Enabled
Disabled
When "Enabled" is selected, the following subwindow is displayed to select the
cache write policy. The options for this setting are Write-back (default) and Write-
through for CPU cache.
Write policy
Write-back policy provides better system performance, because main memory is
accessed only when necessary to update the cache contents with changes in main
memory. Write-through policy accesses main memory every time data is handled by
the processor.
(b) Level 2 Cache
Use this option to enable or disable the level 2 cache. When "CPU Cache" is set to
"Disabled", this option cannot be changed.
Enabled
Disabled
(c) Dynamic CPU Frequency mode
Use this option to choose a setting from the followings.
Dynamically Switchable
Portege M200 Maintenance Manual (960-457)
Enables the CPU cache. (Default)
Disables the CPU cache.
OPTION
= Write-back
Enables the level 2 cache. (Default)
Disables the level 2 cache.
Enables Intel SpeedStep technology. When the computer is
in use, CPU power consumption and clock speed are
automatically switched when necessary. (Default)
3 Tests and Diagnostics
3-77