machine to its limits. Categories Apple II cards can be broadly divided into the following categories: 50-pin standard slots Serial cards (RS-232 serial interface) Parallel cards (Centronics/IEEE 1284 parallel interface) Multifunction I/O cards Internal modems 80 column (or more) text cards (e.g., Videx) PAL color graphics cards (required for color graphics in early European Apples) RGB cards Floppy disk controllers Hard disk controllers Network adapters Co-processor cards Memory expansion cards Accelerators Realtime clock cards Music and sound cards Miscellaneous cards Other slot types Slot 0 card (Firmware Card, Language Card) Apple IIc internal expansion cards Apple IIgs memory expansion cards (40-pin IIgs slot type) Apple IIgs accelerators Apple IIe auxiliary cards (60-pin auxiliary slot; 80-column cards, RGB, memory expansion) External links About cards Datasheets, manuals, ROM and disk images, schematics, sound files, photos, and product advertisements related to Apple II computers and peripherals. Manufacturers ReactiveMicro.com — Hard drive controllers, GS-RAM card, Mockingboard clone, replacement power supplies, No-Slot Clock, MicroDrive, TransWarp GS 32KB Cache Board, other TransWarp GS upgrades R & D Automation — CFFA Compact Flash, IDE interface card A2 Retrosystems — Uther Ethernet card SVD — Semi Virtual Diskette, solid-state 5¼" disk emulator 8 Bit Baby — prototyping board RC Systems — DoubleTalk (Echo and Slotbuster compatible) speech synthesizer card Peripheral cards Motherboard expansion slot