Apple Duo 270C manual Adding memory to your computer, Connecting sound input and output devices

Connecting sound input and output devices

The Duo Dock and the Duo MiniDock have a sound input port (marked with the icon X) to which you can connect a microphone.

The microphone provided with the Duo Dock can pick up sounds within a range of several feet. You can place it near your computer, or you can use the clip provided to attach it to your clothing. The microphone has no on/off switch; it is controlled by the program you use to record sounds. (Sound recording is described in the chapter on sound and color.)

sWarning: 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. s

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 attach 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 up to 24 MB. (Note that any time you have 8 MB of RAM or more, you need to turn on 32-bit addressing. See the section called “Turning on 32-bit addressing” 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.

268 Chapter 13: Building a PowerBook Duo System