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Chapter 4: BIOS
4-9
Cache Video BIOS Area
This setting allows you to designate a reserve area in the system memory to be
used as a Video BIOS buffer to allow the BIOS write (cache) its data into this
reserved memory area. Select " Write Protect " to enable the function and this
area will be reserved for Video BIOS ROM access only. Select "Uncached" to
disable this function and make this area available for other devices.
Cache Base 0-512K
If enabled, this feature will allow the data stored in the base memory area: block
0-512K to be cached (written) into a buffer, a storage area in the Static DRM
(SDROM) or to be written into L1, L2 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 .
Cache Base 512K-640K
If enabled, this feature will allow the data stored in the base memory area: block
512K-640K to be cached (written) into a buffer, a storage area in the Static
DRM (SDROM) or to be written into L1, L2 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 512K-640K. 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 .
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 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 extended memory area. Select "Write Back" to
allow the 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 .