Texas Instruments 3000 - Manual (Page 73)

User Features, Page 2
Backlight Off
After a selected period of no input from the keyboard, the system automatically shuts off
the LCD screen. Pressing any key on the keyboard-preferably the Shift key-turns the LCD
on again. The default setting is 2 minutes.
Note: If you are using a mouse with your application program, you may want to set the
Backlight Off item to Always On to prevent the screen from blanking because of
keyboard inactivity.
HDD Motor Off
To conserve battery charge life, you can set the hard disk motor to turn off automatically
after a period of no accesses to the hard disk. The default setting is 5 minutes.
Note: Although turning off the hard disk when not in use conserves battery charge life,
you may note slower disk access times because the computer must wait for the disk motor
to reach operating speed before accessing data.
Default CPU Speed
This item specifies the CPU speed used when the computer boots. The default setting is
Auto. The Low setting corresponds to 8 MHz CPU speed, Medium to 10 MHz, and High
to 20 MHz. The lower speeds increase battery charge life but may slow processing of
some application programs.
The Auto setting enables the computer to operate as follows.
q When operated on ac power, the computer sets the CPU speed to 20
MHz when it powers up.
q When operated on battery power, the computer sets the CPU speed to 10
MHz when it powers up.
4-12 Customizing Your Computer