Previously, users could only use the second side by manually flipping them over. In contrast to its single-sided predecessors, the 1541 and the briefly-available 1570, the 1571 can use both sides of the disk at the same time. Adding double-density MFM encoding allowed the drive to read and write contemporary CP/M disks (and many others). The 1571 was designed to partner with the new Commodore 128 (C128), which introduced support for CP/M. This made it fairly competitive in terms of storage, but limited it to only reading and writing disks from other Commodore machines. It also implemented a "burst mode" that doubled transfer speeds, helping address the very slow performance of previous Commodore drives.Įarlier Commodore drives used a custom group coded recording format that stored 170 kB per side of a disk.
With its double-sided drive mechanism, it has the ability to use double-sided, double-density (DS/DD) floppy disks, storing a total of 360 kB per floppy. The Commodore 1571 is Commodore's high-end 5¼" floppy disk drive, announced in the summer of 1985. 5¼" floppy disk DS DD using GCR or MFM Ĭommodore proprietary serial IEEE-488 5200 bytes/s
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