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Connecting sound input and output devices
The Duo Dock and the Duo MiniDock have a sound input port (marked with
the icon ≈) to which you can connect a microphone to record sounds on your
computer. (Sound recording is described in the chapter on sound and color in
the
Macintosh Reference book.)
The Duo Dock and the Duo MiniDock also have a sound output port (marked
with the icon -) to which you can connect speakers, an amplifier,
headphones, or other audio output devices. The sound output port accepts a
standard stereo miniplug, like that used to connect headphones to a portable
tape player.
Adding memory to your computer
Your PowerBook computer comes with at least 4 MB of RAM. By adding
memory upgrade cards you can increase your computer’s memory. (Note that
any time you have more than 8 MB of RAM, you need to turn on 32-bit
addressing. See the section on turning on 32-bit addressing in the Macintosh
Reference book for help.) You can find out how much memory your computer
has by choosing About This Macintosh from the Finder’s Apple menu.
Apple provides memory upgrades through its authorized dealers. Memory
upgrades are also available from other vendors; ask your dealer for more
information. It is recommended that memory upgrades be installed by an
Apple-authorized dealer.
Your PowerBook computer also supports virtual memory, a feature that makes
use of hard disk space to provide additional RAM.
WARNING
Do not plug a sound output device (such as a pair of
headphones) into the sound input port. Doing so may damage your
audio equipment.
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Building a PowerBook Duo System