Themis RES-XR4-3U, Installation Manual

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3—BIOS Setup Utility
Advanced Setup Configurations
3-27
Themis Computer
This item sets the transmission speed for a serial port used in Console Redirec-
tion. Make sure that the same speed is used in the host computer and the client
computer. A lower transmission speed may be required for long and busy lines.
The options are 9600, 19200, 57600, and 115200 (bits per second).
Flow Control
This feature allows the user to set the fl ow control for Console Redirection to
prevent data loss caused by buffer overflow. 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 features is displayed.
3.3.9 ACPI Settings
Use this feature to configure Advanced Configuration and Power Interface (ACPI)
power management settings for your system.
3.3.9.1 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.
3.3.9.2 High Precision 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 depen-
dency 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.