- Co-processor: A co-processor is a microprocessor that works with or overrides the microprocessor that comes with your computer. The main reason you'd get one is to take advantage of software developed for other computers—software that wouldn't otherwise work on an Apple IIGS. The most popular co-processor for the Apple IIGS is the Z80 processor, which lets you run applications based on the CP/M® operating system. By plugging a Z80 card into your Apple IIGS, you can select from over 20,000 CP/M-based applications, many of them free (public-domain) software.
- CD ROM Player: CD stands for compact disc. A device that reads information from 550-megabyte disks by using laser technology. Information stored on CD ROM disks can be loaded into memory, displayed on the screen, and printed, but you can't store your own data on the disks.
- Musical Instrument Digital Interface (MIDI) card: An interface card that lets you use your Apple IIGS as a music synthesizer and as a control device for electronic keyboards and drum machines.
- Light pen: A peripheral device shaped like a pen that sends instructions to the computer when you point to choices on the screen. It works only with applications designed to receive input from a light pen.
- Adaptive devices for the disabled: Contact the National Rehabilitation Information Center (NARIC), Closing the Gap, or the Trace Research and Development Center for information on adaptive devices available for the Apple II family of computers, including speech synthesizers, voice input devices, braille keyboards and printers, breath-operated keyboards, and optical keyboards operated with light pens.
NARIC
4497 8th Street NE
Washington, DC 20017
(202) 635-5826
Trace Research and Development Center
University of Wisconsin
314 Waisman Center
1500 Highland Avenue
Madison, WI 53705
(608) 262-6966
Closing the Gap
P.O. Box 68
Henderson, MN 56044
(612) 248-3294
