INDUSTRIAL GRADE CPU BOARD User’ s Guide
AR-B1479 INDUSTRIAL GRADE CPU BOARD User' s ... - Acrosser
AR-B1479 INDUSTRIAL GRADE CPU BOARD User' s ... - Acrosser
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AR-B1479 <strong>User’</strong>s <strong>Guide</strong><br />
Internal Cache<br />
This option specifies the caching algorithm used for L1 internal cache memory. The settings are:<br />
Setting<br />
Disabled<br />
WriteBack<br />
WriteThru<br />
Description<br />
Neither L1 internal cache memory on the <strong>CPU</strong> or L2<br />
secondary cache memory is enabled.<br />
Use the write-back caching algorithm.<br />
Use the write-through caching algorithm.<br />
Table 0-1 Internal Cache Setting<br />
External Cache<br />
This option specifies the caching algorithm used for L2 secondary (external) cache memory. The settings are:<br />
Setting<br />
Description<br />
Disabled Neither L1 internal cache memory on the <strong>CPU</strong> or L2<br />
secondary cache memory is enabled.<br />
WriteBack Use the write-back caching algorithm.<br />
WriteThru Use the write-through caching algorithm.<br />
Table 0-2 External Cache Setting<br />
System BIOS Cacheable<br />
When this option is set to Enabled, the contents of the F0000h system memory segment can be read from or<br />
written to L2 secondary cache memory. The contents of the F0000h memory segment are always copied from the<br />
BIOS ROM to system RAM for faster execution.<br />
The settings are Enabled or Disabled. The is Enabled. The <br />
is Disabled.<br />
Shadow<br />
These options control the location of the contents of the 32KB of ROM beginning at the specified memory location.<br />
If no adapter ROM is using the named ROM area, this area is made available to the local bus. The settings are:<br />
SETTING<br />
DESCRIPTION<br />
Disabled The video ROM is not copied to RAM. The contents of<br />
the video ROM cannot be read from or written to cache<br />
memory.<br />
Enabled The contents of C000h - C7FFFh are written to the same<br />
address in system memory (RAM) for faster execution.<br />
Cached The contents of the named ROM area are written to the<br />
same address in system memory (RAM) for faster<br />
execution, if an adapter ROM will be using the named<br />
ROM area. Also, the contents of the RAM area can be<br />
read from and written to cache memory.<br />
Table 0-3 Shadow Setting<br />
32