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A compatibility card is an expansion card for computers that allows it to have hardware emulation with another device. While compatibility cards date back at least to the Apple II family , the majority of them were made for 16-bit computers, often to maintain compatibility with the IBM PC .
The Apple IIc has rear peripheral expansion ports integrated onto the main logic board instead of the expansion slots and direct motherboard access of earlier Apple II models. Apple intended the Apple IIc to require less technical expertise to use. The Apple IIc weighs 7.5 lb (3.4 kg).
Expansion: Six NuBus slots were available for expansion (at least one of which had to be used for a graphics card, as the Mac II had no onboard graphics chipset and the OS didn't support headless booting). It is possible to connect as many as six displays to a Macintosh II by filling all of the NuBus slots with graphics cards.
The Apple IIc Plus is the sixth and final model in the Apple II series of personal computers, produced by Apple Computer.The "Plus" in the name was a reference to the additional features it offered over the original portable Apple IIc, such as greater storage capacity (a built-in 3.5-inch floppy drive replacing the classic 5.25-inch drive), increased processing speed, and a general ...
The Z-80 SoftCard, making the computer compatible with CP/M software, was also very popular. Both Apple and dozens of third-party vendors created hundreds of cards for the Apple II series of computers. These additional slots afforded great opportunities for expansion.
Expansion: Connectors on the rear panel include an ADB port for keyboard and mouse, two mini-DIN-8 RS-422 serial ports, DB-25 SCSI, DB-19 External floppy drive, and two 3.5 mm minijack audio sockets for audio in and headphone out. The Classic II has a 50-pin internal expansion slot intended for either an FPU co-processor or additional ROM. [6]
A port expander is a device that allows one port on a computer system to connect to multiple devices. Two basic forms of port expander exist: internal and external. An internal expander has a connection inside the computer, typically on the motherboard, and the only part the user sees is the expansion plate containing multiple ports.
The Apple II Plus shipped with 16 KB, 32 KB or 48 KB of main RAM, expandable to 64 KB by means of the Language Card, an expansion card that could be installed in the computer's slot 0. The Apple's 6502 microprocessor could support a maximum of 64 KB of address space , and a machine with 48 KB RAM reached this limit because of the additional 12 ...