Commodore proprietary serial IEEE-488 5200 bytes/s[2]
Backward compatibility
Commodore 64,Commodore 128
Predecessor
Commodore 1570
Successor
Commodore 1581
The Commodore 1571 is Commodore's high-end 5¼" floppy disk drive, announced in the summer of 1985. 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. It also implemented a "burst mode" that improved transfer speeds, helping address the very slow performance of previous Commodore drives.
Earlier Commodore drives used a custom group coded recording format that stored 170 kB per side of a disk. This made it fairly competitive in terms of storage, but limited it to only reading and writing disks from other Commodore machines. The 1571 was designed to partner with the new Commodore 128 (C128), which introduced support for CP/M. Adding double-density MFM encoding allowed the drive to read and write contemporary CP/M disks (and many others).
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. Previously, users could only use the second side by manually flipping them over. Because flipping the disk also reverses the direction of rotation, the two methods are not interchangeable; disks which had their back side created in a 1541 by flipping them over would have to be flipped in the 1571 too, and the back side of disks written in a 1571 using the native support for two-sided operation could not be read in a 1541.
^ abZimmerman, Bo (20 March 2015). "Commodore 1570/1571". zimmers.net. Archived from the original on 9 September 2023. Retrieved 11 September 2023.
^ abcd"Commodore 1571 disk drive user's guide". Commodore Business Machines, Inc. August 1985. Retrieved 1 February 2024.
^"Memory map". Commodore Business Machines, Inc. October 1986. Retrieved 27 April 2016.
The Commodore1571 is Commodore's high-end 5¼" floppy disk drive, announced in the summer of 1985. With its double-sided drive mechanism, it has the ability...
The Commodore 1570 is a 5¼" floppy disk drive for the Commodore 128 home/personal computer. It is a single-sided, 170 kB version of the Commodore1571, released...
available. Unlike the 1571, which is nearly 100% backward-compatible with the 1541, the 1581 is only compatible with previous Commodore drives at the DOS...
transmissions. The Commodore 64 and 128 computers and the Commodore1571 drive use the Complex Interface Adapter. Commodore 1541 disk drive VC 1571 floppy drive...
prominent use was in the Commodore 64 and Commodore 128(D), each of which included two CIA chips. The Commodore 1570 and Commodore1571 floppy disk drives contained...
native mode. But if C64 mode is activated by holding the Commodore key down when powering-up, the 1571 then goes into 1541 mode. This routine is necessary...
that used non-standard disk formats with unusual track counts. The Commodore1571 had an optical head stop instead of a mechanical one. The TRS-80 Model...
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...
The Commodore 65 (also known as the C64DX) is a prototype computer created at Commodore Business Machines in 1990–1991. It is an improved version of the...
The Commodore 1540 (also known as the VIC-1540) is the companion floppy disk drive for the VIC-20 home computer. It was introduced in 1982. It uses single-sided...
is a hardware expansion for the Commodore computers and floppy disk drives like Commodore 1541, 1541-II, Commodore1571. It combined the disk controller...
extensions to this chip. Many other computers, particularly ones from Commodore and early ones from Apple, write disks in formats which cannot be encoded...
Commodore got its production lines going with the 1571, the double-sided drive. Finally, the small, external-power-supply-based, MFM-based Commodore 1581...
User's Guide. Commodore Business Machines. 1982. p. 9. 1571 User's Guide. Commodore Business Machines. 1985. p. 23. 1581 User's Guide. Commodore Business Machines...
The Commodore PET is a line of personal computers produced starting in 1977 by Commodore International. A single all-in-one case combines a MOS Technology...
Commodore DOS, also known as CBM DOS, is the disk operating system used with Commodore's 8-bit computers. Unlike most other DOSes, which are loaded from...
slowness. Only at the introduction of the Commodore 128 computer and the Commodore1571 disk drive was the original plan put into action and a hardware shift...
Commodore 64 disk/tape emulation and data transfer comprises hardware and software for Commodore 64 disk & tape emulation and for data transfer between...
1570 and 1571) and, later, 31⁄2 inch (1581) variety were available from Commodore. The 1541 was the standard floppy disk drive for the Commodore 64, with...
compatibility mode while retaining its increase in speed, whereas Commodore's1571 drive cannot take advantage of its own "burst" mode within the C128's...
by Timeworks for the Commodore 128 in native mode. It had 40- and 80-column modes, and was compatible with both the 1541 and 1571 disk drives. The program...
estate's present appearance. They are descended from the 3rd Marquess's son Commodore Lord Robert Brudenell-Bruce RN. Lord Robert's son George, Edmund's father...
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