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Commodore 1571, TESTED, 5.25β Floppy Drive for C128 C64 and Others
Appearance: Used
Functionality: Mostly Working β see description
Description:
============
As pictured, a Commodore 1571 Floppy Drive. Includes just the main drive and sample floppy β no other accessories are available. Lever doesnβt fully lock, if disk is manually locked into drive β it reads fine. Top Panel is missing screws β it fits but is loose.
Warranty and Returns:
=====================
We understand that there may be compatibility issues, space constraints, or it just doesnβt look perfect. This item can be returned within 14-days for ANY reason. However, shipping to and from is not refundable.
Shipping:
=========
- Other shipping methods are available β contact us for details.
- Combined shipping is available for most items β contact us for details.
- Local pickup is also available at no cost.
About Us:
=========
The Computer Preservation Group is dedicated to the preservation of historical computers. To help fund ongoing operations, select items are made available. To learn more, please visit our website. Thank you for your support!
Stock#:C1553.GQ
Details from https://en.wikipedia.org/wiki/Commodore_64:
The Commodore 1571 is Commodore's high-end 5ΒΌ" floppy disk drive. With its double-sided drive mechanism, it has the ability to utilize double-sided, double-density (DS/DD) floppy disks natively. This is in contrast to its predecessors, the 1541 and 1570, which can fully utilize such disks only if the user manually flipped them over to access the second side. (However, 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).
The 1571 was released to match the Commodore 128, both design-wise and feature-wise. It was announced in the summer of 1985, at the same time as the C128, and became available in quantity later that year. The later C128D had a 1571-compatible drive integrated in the system unit. A double-sided disk on the 1571 would have a capacity of 340 kB (70 tracks, 1,360 disk blocks of 256 bytes each); as 8 kB are reserved for system use (directory and block availability information) and, under CBM DOS, 2 bytes of each block serve as pointers to the next logical block, 254 x 1,328 = 337,312 B or about 329.4 kB were available for user data. (However, with a program organizing disk storage on its own, all space could be used, e.g. for data disks.)
The 1571 features a "burst mode" when used in conjunction with the C128 (although not when used with the Commodore 64 or VIC-20). This mode replaced the slow bit-banging serial routines of the 1541 with a true serial shift register implemented in hardware, thus dramatically increasing the drive speed. Although this originally had been planned when Commodore first switched from the parallel IEEE-488 interface to a custom serial interface, hardware bugs in the VIC-20's 6522 VIA shift register prevented it from working properly.[1]
For compatibility with copy-protected software, the 1571 could closely emulate the 1541. This mode was the default when the drive was used in conjunction with a C64; while always being able to read and write the 1541's GCR format of 170 kB DD single-sided, in this mode it also would format disks single-sided and transfer data at 1541 speed. An undocumented command allowed the drive to format and use the second side of a disk, but only in single-sided mode.
The 1571 was noticeably quieter than its predecessor and tended to run cooler as well, even though, like the 1541, it had an internal power supply (later Commodore drives, like the 1541-II and the 3Β½" 1581, came with external power supplies).
Functionality: Mostly Working β see description
Description:
============
As pictured, a Commodore 1571 Floppy Drive. Includes just the main drive and sample floppy β no other accessories are available. Lever doesnβt fully lock, if disk is manually locked into drive β it reads fine. Top Panel is missing screws β it fits but is loose.
Warranty and Returns:
=====================
We understand that there may be compatibility issues, space constraints, or it just doesnβt look perfect. This item can be returned within 14-days for ANY reason. However, shipping to and from is not refundable.
Shipping:
=========
- Other shipping methods are available β contact us for details.
- Combined shipping is available for most items β contact us for details.
- Local pickup is also available at no cost.
About Us:
=========
The Computer Preservation Group is dedicated to the preservation of historical computers. To help fund ongoing operations, select items are made available. To learn more, please visit our website. Thank you for your support!
Stock#:C1553.GQ
Details from https://en.wikipedia.org/wiki/Commodore_64:
The Commodore 1571 is Commodore's high-end 5ΒΌ" floppy disk drive. With its double-sided drive mechanism, it has the ability to utilize double-sided, double-density (DS/DD) floppy disks natively. This is in contrast to its predecessors, the 1541 and 1570, which can fully utilize such disks only if the user manually flipped them over to access the second side. (However, 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).
The 1571 was released to match the Commodore 128, both design-wise and feature-wise. It was announced in the summer of 1985, at the same time as the C128, and became available in quantity later that year. The later C128D had a 1571-compatible drive integrated in the system unit. A double-sided disk on the 1571 would have a capacity of 340 kB (70 tracks, 1,360 disk blocks of 256 bytes each); as 8 kB are reserved for system use (directory and block availability information) and, under CBM DOS, 2 bytes of each block serve as pointers to the next logical block, 254 x 1,328 = 337,312 B or about 329.4 kB were available for user data. (However, with a program organizing disk storage on its own, all space could be used, e.g. for data disks.)
The 1571 features a "burst mode" when used in conjunction with the C128 (although not when used with the Commodore 64 or VIC-20). This mode replaced the slow bit-banging serial routines of the 1541 with a true serial shift register implemented in hardware, thus dramatically increasing the drive speed. Although this originally had been planned when Commodore first switched from the parallel IEEE-488 interface to a custom serial interface, hardware bugs in the VIC-20's 6522 VIA shift register prevented it from working properly.[1]
For compatibility with copy-protected software, the 1571 could closely emulate the 1541. This mode was the default when the drive was used in conjunction with a C64; while always being able to read and write the 1541's GCR format of 170 kB DD single-sided, in this mode it also would format disks single-sided and transfer data at 1541 speed. An undocumented command allowed the drive to format and use the second side of a disk, but only in single-sided mode.
The 1571 was noticeably quieter than its predecessor and tended to run cooler as well, even though, like the 1541, it had an internal power supply (later Commodore drives, like the 1541-II and the 3Β½" 1581, came with external power supplies).
