Datasheet

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 to 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 DRAM
(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 directly back 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 DRAM
(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 the CPU to
write data directly back 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.