Chapter 4: BIOS
4-9
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 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 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"
.
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 extended memory area above
1MB. 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"
.
