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Flow Control
Use this feature to set the fl ow control for Console Redirection to prevent data
loss caused by buffer overfl ow. Send a Stop signal to stop sending data when
the receiving buffer is full. Send a Start signal to start sending data when the
receiving buffer is empty. The options are None, Hardware RTS/CTS, and
Software Xon/Xoff.
Data Bits, Parity, Stop Bits
The setting for each of these items is displayed.
ACPI Settings
Use this feature to confi gure Advanced Confi guration and Power Interface (ACPI)
power management settings for your system.
ACPI Sleep State
Use this feature to select the ACPI State when the system is in sleep mode. Select
S1 (CPU Stop Clock) to erase all CPU caches and stop executing instructions. In
this setting, power to the CPU(s) and RAM is maintained, but RAM is refreshed.
Select Suspend Disabled to use power-reduced mode. Power will only be supplied
to limited components (such as RAMs) to maintain the most critical functions of the
system. The options are S1 (CPU Stop Clock), and Suspend Disabled.
NUMA (NON-Uniform Memory Access)
Select Enabled to enable the Non-Uniform Memory Access ACPI support. The
options are Enabled and Disabled.
High Precision Event Timer
Select Enabled to activate the High Precision Event Timer (HPET) that produces
periodic interrupts at a much higher frequency than a Real-time Clock (RTC)
does in synchronizing multimedia streams, providing smooth playback, reducing
the dependency on other timestamp calculation devices, such as an x86 RDTSC
Instruction embedded in the CPU. The High Performance Event Timer is used
to replace the 8254 Programmable Interval Timer. The options are Enabled and
Disabled.
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Chapter 7: BIOS
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