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Chapter 7: BIOS
data back directly from the buffer without writing data to the System Memory for
fast CPU data processing and operation. The options are "Uncached", "Write
Through", "Write Protect", and "Write Back".
Cache Extended Memory
If enabled, this feature will allow the data stored in the extended memory area
to be cached (written) into a buffer, a storage area in the Static DRM (SDROM)
or written into L1, L2, L3 cache inside the CPU to speed up CPU operations
. Select "Uncached" to disable this function. Select "Write Through" to allow
data to be cached into the buffer and written into the system memory at the
same time. Select "Write Protect" to prevent data from being written into the
base memory area of Block 0-512K. Select "Write Back" to allow CPU to write
data back directly from the buffer without writing data to the System Memory for
fast CPU data processing and operation. The options are "Uncached", "Write
Through", "Write Protect", and "Write Back".
Discrete MTRR Allocation
If enabled, MTRRs (-Memory Type Range Registers) are confi gured as distinct,
separate units and cannot be overlapped. If enabled, the user can achieve
better graphic effects when using a Linux graphic driver that requires the write-
combining confi guration with 4GB or more memory. The options are Enabled
and Disabled.
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