User`s manual
4-12
X7DCA-L User's Manual
SERR Signal Condition
This setting species the ECC Error conditions that an SERR# is to be asserted.
The options are None, Single Bit, Multiple Bit, and Both.
4GB PCI Hole Granularity
This feature allows you to select the granularity of PCI hole for PCI slots. If MTRRs
are not enough, this option may be used to reduce MTRR occupation. The options
are: 256 MB, 512 MB, 1GB and 2GB.
Channel 0 Rank Sparing/Channel 1 Rank Sparing
Select Enable to enable the function of memory sparing for Memory Bus Branch 0
or Branch 1. The options are Enabled and Disabled.
Enhanced x8 Detection
Select Enabled to enable Enhanced x8 DRAM UC Error Detection. The options
are Disabled and Enabled.
Demand Scrubbing
Scrubbing is a process that allows the North Bridge to correct correctable memory
errors found on a memory module. When the CPU or I/O issues a demand- read
command, and the read data from memory turns out to be a correctable error, the
error is corrected and sent to the requestor (the original source). Memory is updated
as well. Select Enabled to use Demand Scrubbing for ECC memory correction.
Patrol Scrubbing
Scrubbing is a process that allows the North Bridge to correct correctable memory
errors detected on a memory module, and send the correction to the requestor (the
original source). When this item is set to Enabled, the North Bridge will read and
write back one cache line every 16K cycles, if there is no delay caused by internal
processing. By using this method, roughly 64 GB of memory behind the North Bridge
will be scrubbed every day. The options are Enabled and Disabled.
Route Port 80h Cycles to
This feature allows the user to decide which bus to send debug information to. The
options are PCI and LPC.
Enable Multi-Media Timer
Select Yes to activate a set of timers that are alternative to the traditional 8254
timers for the OS use. The options are Yes and No.