Lanner electronics IAC-H670 Series, User Manual

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Chapter3 BIOS Setup
31
User’s Manual
Settings are Fast and Slow.
CPU Latency Timer:
During Enabled, A deferrable CPU cycle will only be Deferred after it has been in a
Snoop Stall for 31 clocks and another ADS# has arrived. During Disabled, A deferrable CPU cycle will be
Deferred immediately after the GMCH receives another ADS#.
USB Function: This option will enable on-chip USB function to support USB (Universal Serial Bus)
peripheral devices if user chooses the “Enabled” setting.
USB Device Legacy Support: This field support Universal Serial Bus (USB) devices. If detected, USB
controller legacy mode will be enabled. If not detected, USB controller legacy mode will be disabled.
Port 64/60 Emulation:
Setting this option to allow a USB keyboard to act like a legally keyboard.