Input and OutputBasics
PowerBook (FireWire)
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Input and Output
Keyboard and Trackpad
The keyboard and trackpad are the same design as those used in the earlier
PowerBook G3 Series of computers. The PowerBook (FireWire) keyboard
includes a built-in numeric keypad and controls to adjust display
brightness, speaker volume, and external audio port volume.
Several of the keys on the keyboard have more than one mode of operation.
These changes are controlled by the Fn key, the Num Lock key, and the
Function Keys checkbox in the Keyboard control panel.
FireWire Ports and Target Disk Mode
The PowerBook (FireWire) has two external FireWire ports. The ports
• support serial I/O at up to 400 Mbps (megabits per second)
• provide up to 6 watts of power when the computer is turned on
• accept external power input from the bus
• support booting the system from a mass storage device
• support target disk mode.
Target Disk mode is similar to SCSI Disk mode, except it uses a FireWire
connection. When the PowerBook is in Target Disk mode, the PowerBook
operates as a mass storage device. The two primary uses of this feature
are:
• high-speed data transfer between computers or devices
• diagnosis and repair of a corrupted internal hard drive.
To put the PowerBook in Target Disk mode, hold down the T key while
starting up. To take the PowerBook out of Target Disk mode, press the
power button.
USB Ports
The PowerBook (FireWire) has two Universal Serial Bus (USB) ports
that can be used to connect I/O devices such as a USB mouse, printers,
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