[. . . ] Caution: Use only the AC adapter recommended in this document (TI Part No. Another adapter may damage your computer. ! DC Connector AC Adapter Female Connector Male Plug AC Adapter 4-2 PC Cards PC cards are used to add functionality to your computer, such as communicating over a telephone or connecting to a network. The computer has built-in slots that support one Type III or two Type II/I PC Cards. [. . . ] The computer has built-in slots that support one Type III or two Type II/I PC Cards. The following PC Cards are available: Y Y Y Y 14. 4 KB data/send/receive/fax/ voice modem with XJACK® (TI Part No. 9791773-0002) For the current list of available PC cards, call 1-800-TI-TEXAS, option 2, 1. 4-3 Numeric Keypad The optional PS/2 Numeric Keypad (TI Part No. 2581381-0001) can be used instead of the internal numeric keypad. PS/2 Numeric Keypad To use the PS/2 numeric keypad, turn the computer off. Plug the keypad's cable connector into the computer's PS/2 (Mouse/Keyboard) connector located on the rear of the computer (Refer to Using Connectors and Ports in Chapter 2). For further information on the PS/2 Numeric Keypad, refer to instructions that come with your keypad. 4-4 External Monitor You can connect the computer to external monitors, many of which can display resolutions higher than 640 x 480. When the computer is connected to an external monitor, you can use the computer with the display closed. The system's internal speakers are disabled when external speakers or headsets are plugged in. Line In allows you to input an external stereo source into your computer. This allows you to play an external CD through the system speakers, for example, or make a recording if you have the correct software. 4-9 Audio Options Microphone In allows you to record input into the system through the microphone and allows you to use the speakerphone functions of the Data Race WinMAXTM PCMCIA speakerphone/ modem offered by TI. 4-10 External Floppy Disk Drive To connect the external floppy disk drive to you computer you will need the floppy disk drive cable that was included in the accessory box with the floppy disk drive. Plug the 25-pin end of the floppy disk drive cable into the parallel port on the rear panel of the computer. Attach the other end of the cable to the floppy disk drive. Connecting an External Floppy Disk Drive 4-11 Miscellaneous Options There are additional options available for use with your computer . These include: Batteries You can purchase spare batteries -- Duracell NiMH or Li-Ion -- from your local computer store or directly from Duracell. A list of phone numbers to call to order the Duracell batteries is listed in your system. [. . . ] These include: Batteries You can purchase spare batteries -- Duracell NiMH or Li-Ion -- from your local computer store or directly from Duracell. A list of phone numbers to call to order the Duracell batteries is listed in your system. For information on these batteries, refer to Chapter 3, Using Battery Power. [. . . ]