Apple 3400 Series manual Adding memory to your computer, Using infrared file transfer

Adding memory to your computer

Your Macintosh PowerBook comes with at least 16 MB of random-access memory (RAM). You can increase your computer’s memory by adding a RAM expansion card. You can find out how much memory your computer has by choosing About This Computer from the Apple (K) menu in the Finder.

You can purchase memory upgrades from Apple-authorized dealers. For complete instructions on installing a RAM expansion card, see Appendix C.

Your Macintosh PowerBook also supports virtual memory, a feature that makes use of hard disk space to provide additional RAM. Your computer comes with virtual memory turned on. For information on using virtual memory, see the “Memory” topic area of Mac OS Guide, available in the Guide (h) menu.

Using infrared file transfer

Your Macintosh PowerBook has built-in infrared (IR) communication features that allow you to send and receive data without wires. You can exchange files with another PowerBook or with a desktop Macintosh that is using an external IR module such as Farallon’s AirDock. In addition, you can use IR to make a wireless connection to a network by means of a specialized local area network (LAN) access device, such as Hewlett-Packard’s NetBeamIR or Extended Systems’ JetEye, that is compatible with the Infrared Data Association (IrDA) Standard specifications.

To transfer files, your computer and the other IR device must be within range of each other with the IR windows facing. The range depends on the devices and the method of communication.

Two PowerBook 3400 series computers must be within 5 feet of each other to exchange files using the IRTalk transfer protocol (at 230 kilobits per second). Your computer must be within 3 feet of a LAN access device that complies with the IrDA Standards to make a network connection (at a transfer rate of 1 megabit per second).

You use the Infrared control panel to select the method of IR communication you want to use or to view the status of an IrDA connection. For instructions on IR file transfer, see “How do I use infrared communication?” in the “Organizing Your Files” topic area of Mac OS Guide, available in the Guide (h) menu.

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