Apple Macintosh PowerBook 1400 - Manual (Page 31)

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Read this chapter for information
on using expansion bay
modules and PC Cards.
Using expansion bay modules
The floppy disk drive and the optional CD-ROM drive in your Macintosh
PowerBook are removable modules, which you can easily switch or replace
with another module. The place in your computer where modules go is called
the expansion bay. When no module is installed in the expansion bay, you can
use it to store an extra battery for your computer.
You can switch modules or remove a module while the PowerBook is turned
off or in sleep. All expansion bay modules are inserted and removed in the
same way.
To protect your work and to be sure that the computer recognizes which
module is in use, follow these precautions for removing or switching
expansion bay modules:
m Verify that the computer is in sleep or has been shut down.
m Before removing a module, first quit any programs that may be using files
on the disk in that module. Then drag the disk’s icon to the Trash or select
the icon and choose Put Away from the File menu.
IMPORTANT Don’t switch modules while the computer is starting up. Also take
care not to remove a module if a floppy disk or CD-ROM disc is inserted and
in use.
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Using Expansion Bay Modules and PC Cards