Duodisk 5.25" Drive (A9M0108)

The DuoDisk is effectively two Unidisk 5.25" drives in a single enclosure. It has a beige case and no pass through port.

The drive may need to be modified to work with a IIgs (see Apple II FAQs).



Apple PC 5.25" Drive (A9M0110)

Apple's first IBM PC compatability product was a 360KB floppy drive. It was designed for use with either a NuBus controller card or an SE PDS controller card. It will also work with early AST or Orange PC processor cards.

According to Apple, the drive and controller cards are not compatible with Macs with FDHD ROMs.

(Photo and information courtesy of Fabrice Montupet.)



Apple Disk III (A3M004)

The Disk III is designed for use with the Apple III or III+. The two models have different floppy connectors and an adapter may be required (see links below).

(Photo courtesy of Sckop at http://www.apple2world.jp/.)



Apple Model
Adapter Requirement
External Drives

Apple IIe or earlier
Disk II or Apple 5.25" controller
Disk II, Disk IIc, Unidisk 5.25", Apple 5.25", DuoDisk 5.25"

Apple IIe or earlier
"Liron" controller
Unidisk 3.5"

Apple IIe or earlier
"Superdrive" controller
Unidisk 3.5", Apple 3.5", Apple FDHD

Apple IIe or earlier
Laser "Universal Disk Controller"
?? Unidisk 3.5", Apple 3.5"

Apple IIc
May require ROM update
Unidisk 3.5"

Apple IIc
None
Disk II (modified cable), Disk IIc, Unidisk 5.25", Apple 5.25", DuoDisk 5.25" (one drive only)

Apple IIc+
None
Apple 3.5", Unidisk 3.5", Apple 5.25", Unidisk 5.25", Disk II (modified cable)

Apple IIgs
None
Disk II (modified cable), Disk IIc, Unidisk 5.25", Apple 5.25", DuoDisk 5.25" (modified board)

Apple IIgs
None
Unidisk 3.5", Apple 3.5"

Apple IIgs
"Superdrive" controller
Apple FDHD

LC family Macintosh
LC IIe Workstation card
Unidisk 3.5", Apple 5.25"

Mac 128K, 512K
800K drive requires HD20 INIT for HFS support. HD20 INIT does not work with Mac 128 which can use drives only as MFS devices.
M0130, M0131, Apple 3.5"

Mac 512Ke, Plus, SE (not FDHD)
None
M0130, M0131, Apple 3.5"

Mac SE FDHD, SE/30, Classic, Classic II, Portable
None
M0131, Apple 3.5", Apple FDHD

Mac IIcx, IIci, IIsi
None
M0131, Apple 3.5", Apple FDHD

Mac SE, Mac II
PC drive card
Apple PC 5.25"

http://www.vintagemacworld.com/drives.html