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Flow Control
This feature allows the user 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.
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.
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)
This feature enables 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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