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Drive · 1978ObsoleteRare · 70
Disk II
A2M0003 · Apple II era
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Identifiers
| Order number | A2M0003 |
Reference
| Original price | $495 |
| Announced | 1978-06-01 |
| Discontinued | 1984-11-30 |
| Design era | Apple II era |
Configurations
| Colors | Beige |
| Drive type | — |
| Capacity | — |
| Interface | 140 KB (5.25″ SSSD), 280 KB (flipped disk) |
| Mechanism | — |
| Compatibility | Apple DOS 3.x, ProDOS 8 |
| Removable media | 5.25″ floppy |
Physical
| Ports & connectivity | 20-pin ribbon to Disk II controller card |
| Dimensions (W×H×D) | 215 × 90 × 260 mm |
| Weight | 2.1 kg |
Known quirks
- Wozniak's legendary minimal-hardware floppy controller — 14 chips vs. 40 on competitors
- No index hole sensor; software tracked disk position — enabled copy protection tricks
- Base controller card supports 2 daisy-chained drives
- Belt eventually stretches; new belts still made by community suppliers
- The drive that made the Apple II a productivity machine