Apple PowerBook G3 - Manual (Page 42)

42 Chapter 2
Using PC Cards
PC Cards (also known as PCMCIA or CardBus cards) are about the size of a thick credit card
and have a 68-pin connector at one end. They come in many varieties, such as fax/modem
cards, mass-storage cards, Ethernet connection cards, zoomed video cards, and wireless
communication cards. You can use PC Cards to expand your Macintosh PowerBook’s
capabilities.
Your Macintosh PowerBook has two PC Card slots. You can insert a card into either slot, or
(depending on the cards you’re using) you can use both slots simultaneously.
There are three types of PC Cards. The different types refer to the thickness of the card. A
Type I card is 3.3 millimeters (mm) thick, a Type II card is 5 mm thick, and a Type III card is
10.5 mm thick.
You can place a Type I or Type II card in either slot. You can place a Type III card only in the
lower slot. When a Type III card is installed, you cannot use the upper slot. You may find it
useful to get in the habit of always using the lower slot first to make sure the card is properly
inserted.
A special type of PC Card supports “zoomed video,” which can display full-motion video in a
window on the computer’s screen.
Note: Zoomed video cards must be placed in the lower PC Card slot.
This section describes how to insert and eject PC Cards and how to use PC Card modems.
You can find more information on using PC Cards in the online help, available in the Help
menu.
Warning Make sure only to use cards that are compatible with your Macintosh
PowerBook. If you use an incompatible card, you may damage the card or your
PowerBook. If you are not sure whether a PC Card is compatible with your PowerBook,
contact the PC Card’s manufacturer.