Commodore 1551
View of a European Commodore 1551 disk drive, showing the connector | |
| Codename | SFS481 |
|---|---|
| Manufacturer | Commodore Business Machines, Inc. |
| Product family | Commodore 264 series |
| Type | Floppy drive |
| Release date | 1984 |
| Introductory price | US$400 (1984) equivalent to $1,200 in 2024 |
| Discontinued | 1986 |
| Media | 5.25" floppy disk Single Sided, Single Density |
| Operating system | CBM DOS 2.6 |
| CPU | MOS 6510T: 86 |
| Memory |
|
| Storage | 170 kB: 86 |
| Connectivity | TED parallel port |
| Dimensions | 97 mm × 200 mm × 374 mm 3.8 in × 7.9 in × 14.7 in: 86 |
| Weight | 10.5 kg 23 lb: 86 |
| Backward compatibility | |
| Predecessor | Commodore 1541 |
| Successor | |
The Commodore 1551 (originally introduced as the SFS 481) is a floppy disk drive for the Commodore Plus/4 home computer. It resembles a charcoal-colored Commodore 1541 and plugs into the cartridge port, providing faster access than the C64/1541 combination. Commodore reportedly planned an interface to allow use of the 1551 with the C64, but it was never released.
Aside from faster access, the drive is very similar to the 1541. Like the 1541, it is a single-sided 170-kilobyte drive for 5¼" disks, with each disk split into 664 256-byte blocks available for user data plus 19 blocks for DOS data and directory; the file system makes each block its own cluster.: 86