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 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 the L1, L2 cache memory 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 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 the L1, L2 cache memory 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 L1, L2, L3 cache memory
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
.
