CHAPTER 4
AMI
®
BIOS USERS GUIDE
4-10
Description of the item on screen follows:
USB Function
Set this option to Enabled or Disabled the on-chip USB controller.
The Optional and Fail-Safe default settings are Disabled.
USB Keyboard Legacy Support
Set this option to Enabled or Disabled USB keyboard.
The Optional and Fail-Safe default settings are Disabled.
DRAM Page Closing Policy
This option controls whether the GMCH will precharge bank or
precharge all, during the service of a page miss.
Memory Hole
This option allows the end user to specify the location of a memory
hole. The cycle matching the selected memory hole will be passed to the
ISA bus. If Enabled, the selected hole is not remapped.
DRAM Tras/Trc Cycle Time (SCLKs)
This option controls the number of SCLKs for an access cycle.
CAS# Latency
This option determines the CAS latency time parameter of SDRAM.
The settings are 2 clks or 3 clks. Under 66MHz CPU bus, set this option to
either 2 or 3 but for 100MHz CPU, it is recommended that this be set to 3.
SDRAM RAS# to CAS# Delay
This operation decide the delay in assertion of CAS#(SCAS#) from
assertion of RAS#(SRAS#) in 66MHz. Under 66MHz CPU bus, set this
option to either 2 or 3 but for 100MHz CPU, it is recommended that this be
set to 3.
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