Chapter 4: BIOS
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ACPI Settings
ACPI Sleep State
Use this feature to select which sleep state mode the system will enter when the Suspend
button is pressed. The options are Suspend Disabled and
S3 (Suspend to RAM)
.
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, and reducing the dependency on other
timestamp calculation devices, such as an x86 RDTSC Instruction embedded in the CPU.
The High Precision Event Timer is used to replace the 8254 Programmable Interval Timer.
The options are Disabled and
Enabled
.
Headless Support
Enable this feature for the system to function without a keyboard, monitor, or mouse attached.
The options are
Disabled
and Enabled.
Super IO Configuration
Super IO Chip NCT5523D
Serial Port 1 Configuration
Serial Port
Select Enabled to enable the onboard serial port. The options are Disabled and
Enabled
.
Device Settings
This feature displays the base I/O port address and the Interrupt Request address of the
specified serial port.
Change Settings
This feature specifies the base I/O port address and the Interrupt Request address of Serial
Port 1. Select
Auto to allow the BIOS to automatically assign the base I/O and IRQ address
to a serial port specified. The options are
Auto
, (IO=3F8h; IRQ=4); (IO=3F8h; IRQ=3, 4,
5, 6, 7, 9, 10, 11, 12); (IO=2F8h; IRQ=3, 4, 5, 6, 7, 9, 10, 11, 12); (IO=3E8h; IRQ=3, 4, 5,
6, 7, 9, 10, 11, 12); and (IO=2E8h; IRQ=3, 4, 5, 6, 7, 9, 10, 11, 12).
Baud Rate from different PRE-DIVIDER
Use this feature to select the Baud rate frequency. The options are
PRE-DIV: 13, 1.8461M
Hz
, PRE-DIV: 12, 2M Hz, PRE-DIV: 1, 24M Hz, and PRE-DIV: 1.625, 14.769M Hz.
