Along with the built-in floppy drive, the Apple III can also handle up to three additional external Disk III floppy disk drives. The Disk III is only officially compatible with the Apple III. The Apple III Plus requires an adaptor from Apple to use the Disk III with its DB-25 disk port. [14]

Nov 7, 2019 · It's one of the little differences between the Disk III and Disk II analog boards. The Disk III logic has a few extra features. One feature is a "sticky write-protect" signal. It allowed Apple /// to reliably detect when an (unprotected) disk had been removed or swapped in the drive.

Nov 7, 2019 · It can be connected to the Apple III's external disk port, using a simple 26pin ribbon cable. And it provides a 20pin connector for the original disk II or FloppyEmu ribbon cable. No disassembly or swapping cables required. It can also be …

The ProFile (codenamed Pippin [6]) is the first hard disk drive produced by Apple Computer, initially for use with the Apple III. [1] The original model had a formatted capacity of 5 MB and connected to a special interface card that plugged into an Apple III slot.

This project decribes how to build an adapter connecting an Apple III to a FloppyEmu from Big Mess of Wires - an SD-card based disk drive emulator. Alternatively, the adapter can also be used to connect the Apple III to an original Apple Disk II drive (yes, Disk II, not Disk III).

This article discusses the Apple III emulation mode and disk drive configuration. The Apple II emulation mode on the Apple III is configured so that the internal drive looks like Slot 6, Drive 1 and the first external drive looks like Slot 6, Drive 2.

Apple III was designed as a business machine. It was partly compatible with Apple II. It used powerful memory management system and worked under SOS, which was a great, device independent OS.

The Apple III had a built-in 5.25”, 143 kB floppy disk drive. It ran an exclusive operating system called Apple SOS, which stands for Sophisticated Operating System.

Jun 8, 2019 · Check out the Apple /// Computer and Apple ProFile HDD. Compare with other external Apple drives: Apple Disk 5.25, Apple Disk II, Apple II DuoDisk, Apple IIc Disk, Macintosh 400K Drive, Apple 3.5 Drive. There is a good chance a stuck stepper motor can be repaired.

In the fall of 1980, Apple ships the first Apple III units in limited quantity. It runs twice as fast as the Apple II and has twice as much memory - 128k of RAM. It is also the first Apple computer to have a built-in floppy drive, a Shugart 143k 5.25-inch floppy drive.