Datasheet

4-8
X6DHT-G User's Manual
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Memory Cache
Cache System BIOS Area
This setting allows you to designate a reserve area in the system memory
to be used as a System BIOS buffer to allow the BIOS to write (cache) its
data into this reserved memory area. Select "Write Protect" to enable this
function, and this area will be reserved for BIOS ROM access only. Select
"Uncached" to disable this function and make this area available for other
devices.
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 to write (cache) its
data into this reserved memory area. Select "Write Protect" to enable the
function and this area will be reserved for the 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 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.
Cache Base 512K-640K
If enabled, this feature will allow the data stored in the memory area: 512K-
640K 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 512K-640K. 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.