Chapter 4: BIOS
4-11
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Memory Cache
Memory Cache
This setting allows the user to enable or disable the functions of Memory Cache.
The options are
Enabled
and Disabled.
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) 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 DROM
(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 be 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 to
optimize CPU 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 DROM (SDROM)
or be 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 to optimize CPU 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 DROM (SDROM) or
Summary of Contents for PDSBM-LN1
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