Twiggy floppy drive
E77070
The Twiggy floppy drive was Apple’s proprietary, high-capacity but unreliable 5.25-inch floppy disk drive used in early versions of the Apple Lisa computer.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Apple internal codename "Twiggy" | 1 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
computer storage device
ⓘ
floppy disk drive ⓘ |
| associatedWith |
Apple Lisa
ⓘ
surface form:
Apple Lisa operating system
early Macintosh development history ⓘ |
| bootDeviceFor | early Apple Lisa configurations ⓘ |
| capacityPerDisk | approximately 871 KB ⓘ |
| capacityPerSide | approximately 435 KB ⓘ |
| collectibleStatus | rare ⓘ |
| compatibility | incompatible with standard 5.25-inch floppy disks ⓘ |
| controlElectronics | custom Apple controller board ⓘ |
| dataEncoding | GCR ⓘ |
| dataTransferMethod | serial bitstream over proprietary cable ⓘ |
| designedFor | business computing environment ⓘ |
| developmentEra | early 1980s ⓘ |
| diskCapacityComparison | higher capacity than contemporary 5.25-inch Apple II floppies ⓘ |
| engineeringGoal | provide near-megabyte removable storage ⓘ |
| fileSystemSupport | Lisa File System ⓘ |
| formFactor | 5.25-inch floppy drive ⓘ |
| historicalSignificance | example of failed proprietary storage format by Apple ⓘ |
| intendedAs | high-capacity floppy solution ⓘ |
| interface | proprietary Apple interface ⓘ |
| introducedFor | original Apple Lisa ⓘ |
| legacy | influenced Apple’s later adoption of standardized floppy formats ⓘ |
| manufacturer |
Apple Inc.
ⓘ
surface form:
Apple Computer, Inc.
|
| marketAvailability | limited ⓘ |
| mediaBranding | Apple Twiggy disks ⓘ |
| mediaDiameter | 5.25 inches ⓘ |
| mediaType | flexible magnetic disk ⓘ |
| mountingType | internal 5.25-inch bay ⓘ |
| nameOrigin |
Twiggy floppy drive
self-linksurface differs
ⓘ
surface form:
Apple internal codename "Twiggy"
|
| notableCharacteristic |
mechanically fragile
ⓘ
proprietary disk format ⓘ sensitive to disk alignment ⓘ unreliable in practice ⓘ |
| numberOfDrivesInLisa1 | 2 ⓘ |
| operatingSystemSupport |
Lisa OS
ⓘ
surface form:
Lisa Office System
Lisa Workshop ⓘ |
| powerRequirement | internal drive power from Lisa system ⓘ |
| reasonForReplacement |
reliability problems
ⓘ
standardization on Sony 3.5-inch format ⓘ |
| replacedBy | Sony 3.5-inch floppy drive ⓘ |
| replacedInProduct |
Macintosh XL
ⓘ
surface form:
Apple Lisa 2
|
| requires | special Twiggy floppy disks ⓘ |
| sides | double-sided ⓘ |
| status | discontinued ⓘ |
| storageMedium | Twiggy floppy disk ⓘ |
| usedIn |
Apple Lisa
ⓘ
Lisa 1 ⓘ |
| usedWith |
Motorola 68000 family
ⓘ
surface form:
Motorola 68000-based Lisa hardware
|
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Apple internal codename "Twiggy"