Apple Unidisk 3,5" external floppy
Floppy disk drive, 1985, Apple. The UniDisk 3.5 (A2M2053) was Apple's first 3.5 inch drive for the Apple II family: an 800 KB double-sided Sony mechanism with its own 65C02 processor and 2 KB of RAM inside the drive, so that it could work with the slow 8 bit Apple IIe and IIc.
| Years | 1985 to 1988 |
|---|---|
| Manufacturer | Apple Computer Inc. (US), Sony mechanism |
| Model | A2M2053 |
| Compatibility | Apple IIc (with updated ROM), Apple IIe with the UniDisk 3.5 controller card, Apple IIGS |
| Media | 3.5" double-sided floppy disk, 800 KB |
| Intelligence | built-in 65C02 processor and 2 KB RAM ("smart" drive) |
| Interface | DB-19 disk port, daisy chain |
| Case | beige, Apple IIe style |
| Price (1985) | US$499 |
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