TMC TI6VG4 User Manual page 49

Chapter 6 BIOS Configuration
HDD Power Down
When enabled, and after the set time of system inactivity, the hard disk
drive will be powered down while all other devices remain active.
Doze Mode
When enabled, and after the set time of system inactivity, the CPU clock
will run at a slower speed while all other devices still operate at full
speed.
Suspend Mode
When enabled, and after the set time of system inactivity, all devices
except the CPU will be shut off.
PM Events
The VGA, LPT & COM, HDD & FDD, PCI Master, Modem Ring
Resume, RTC Alarm Resume and Primary INTR section are I/O events
which can prevent the system from entering a power saving mode or can
awaken the system from such a mode. When an I/O device wants to gain
the attention of the operating system, it signals this by causing an IRQ to
occur. When the operating system is ready to respond to the request, it
interrupts itself and performs the service. The default value is Off. When
set On, activity will neither prevent the system from going into a power
management mode nor awaken it. The IRQ section sets the wake-up call
of the system. If activity is detected from any enabled IRQ channels in the
left-hand group, the system wakes up from suspended mode.
TI6VG4 User's Manual 45