Hitachi SA200 - Manual (Page 79)

5 The Power System
SA200 67
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Full Power
•
Power Management
•
Suspend to RAM
•
Suspend to Disk
Each power management mode works for both AC and battery-
powered operations. To change your laptop’s PM settings, run the
Power Saving Setup in the BIOS Setup program. See “Power
Saving Menu” beginning on page 96 for more information.
Full Power Mode
Your laptop operates in Full Power mode when you set Heuristic
Power Management to Disabled in the BIOS Setup program. This
option is located on the Power Saving Menu. In Full Power mode,
all power management features are disabled. Use this mode only
when you are operating the SA200 with the AC adapter.
Power Management
Power management allows you to maximize system performance
while saving power. The SA200 uses an innovative power
management technique called Heuristic Power Management.
Most computers use timer-based power management. You set
timeout timers to determine when the computer should save power
on a device. The problem with this is that no two users are alike.
Each one of us has his or her own habits when using the computer.
This makes timer-based power management ineffective.
Heuristic Power Management allows your computer to manage all
power management. You do not need to set timers because the
computer dynamically sets timeout timers depending on how you
use the computer.
The LCD screen and backlight come on when you use the
keyboard or move the pointing device, and the hard disk returns to
full power the next time it is accessed.
lonestar.boo : sa200.fm Page 67 Friday, March 6, 1998 10:53 AM