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Circuitry that controls reading from and writing to a computer's floppy disk drive
A floppy disk controller (FDC) is a hardware component that directs and controls reading from and writing to a computer's floppy disk drive (FDD). It has
Floppy_disk_controller
Controller for disk storage, usually integrated into the drive
A disk controller is a controller circuit that enables a CPU to communicate with a hard disk, floppy disk or other kind of disk drive. It also provides
Disk_controller
Device that manages disk drives
A disk array controller is a device that manages the physical disk drives and presents them to the computer as logical units. It often implements hardware
Disk_array_controller
Removable disk storage medium
but to the disk controller and its lack of support for Apple's GCR (Group Coded Recording) encoding used on 400 kB and 800 kB Macintosh disks. 8 in (200 mm)
Floppy_disk
Floppy disk drive for the Apple II computer
(equivalent to $2,940 in 2025) including the controller card (which can control up to two drives) and cable. The Disk II was designed specifically for use with
Disk_II
Specialised hard disk controller for forensic usage
A forensic disk controller or hardware write-block device is a specialized type of computer hard disk controller made for the purpose of gaining read-only
Forensic_disk_controller
storage interface controller on CPU or chipset, the flash memory controller on solid state drive, or the disk controller on hard disk drive. In history
Storage_controller
Feature of computer systems
systems use DMA, including disk drive controllers, graphics cards, network cards, sound cards and dedicated DMA controllers (acting on behalf of the aforementioned
Direct_memory_access
Electro-mechanical data storage device
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical computer data storage device that stores and retrieves digital data
Hard_disk_drive
Buffer between a computer and a storage disk
called disk buffer. Note that disk array controllers, as opposed to disk controllers, usually have normal cache memory of around 0.5–8 GiB. When a disk's controller
Disk_buffer
Computer storage bus
only one floppy disk drive can be connected. Floppy disk controller Floppy drive power connector Mueller, Scott (2006-03-24). "Floppy Disk Drives, Past and
Floppy_disk_drive_interface
Internal expansion bus in early PC compatibles
standard dual-function floppy disk controller and hard disk controller card for the IBM PC AT; the fixed disk controller on this card implemented the register
Industry Standard Architecture
Industry_Standard_Architecture
Index of articles associated with the same name
communications controller chip Peripheral DMA controller Disk controller Floppy disk controller Disk array controller, also known as a RAID controller, a type
Controller_(computing)
Floppy disk or optical disk drive made by Apple
Apple II 3.5 Disk Controller Card for Apple IIe and IIGS computers so they too could use 1.40 MB storage and read/write MS-DOS. The controller card as well
SuperDrive
Single-chip version of the floppy disk controller for the Apple II
Machine (or IWM for short) is a single-chip version of the floppy disk controller for the Apple II. It was also employed in Macintosh computers. When
Integrated_Woz_Machine
1977–1993 series of microcomputers
second drive (without controller) retailed for $495. The Disk II single-sided floppy drive used 5.25-inch floppy disks; double-sided disks could be used, one
Apple_II
Video game console peripheral
The Family Computer Disk System, commonly shortened to the Famicom Disk System, is a peripheral for Nintendo's Family Computer (Famicom) home video game
Famicom_Disk_System
Hard disk drive
selection as the hard drive subsystem for the original IBM XT, disk drive controllers supporting the ST-412 interface grew to become ubiquitous in the
ST-506/ST-412
floppy disk controller to read (appearing as one 5632-byte physical sector per track). Format used by rare third-party drives with quad density disks; such
List_of_floppy_disk_formats
External floppy disk drive by Apple
SuperDrive controller (due to electrical changes with the interface). The disks in practice only support the MFS file system. Although a 400-kilobyte disk may
Macintosh_External_Disk_Drive
Process of preparing a data storage device for initial use
low-level format of floppy disks (and early hard disks) is performed by the disk drive's controller. For a standard 1.44 MB floppy disk, low-level formatting
Disk_formatting
Historical method for giving addresses to physical data blocks on hard disk drives
disk - 1), because early hard drives didn't come with an embedded disk controller, that would hide the physical layout. A separate generic controller
Cylinder-head-sector
Microcomputer system
consisted of an 8-bit and a 16-bit microprocessor and a Winchester disk controller. It was intended as a universal programming and development system
P8000
Computer hardware device
devices include ESCON and newer FICON. Disk array controller Fibre Channel Host Bus Adapters Host controller interface for USB and FireWire host adapter
Host_adapter
Software-based, block-level cache of drive data stored in the host computer's main memory
memory. Separate disk caching is provided on the hardware side, by dedicated RAM or NVRAM chips located either in the disk controller (in which case the
Page_cache
Sector of a disk storage unit which is unreadable
wear or flash controller error may also cause bad sectors. Bad sectors may be detected by the operating system or the disk controller. Most file systems
Bad_sector
Chipset used in Amiga personal computer
Keller, from MOS Technology, is the interrupt controller, but also includes logic for audio playback, floppy disk drive control, serial port input/output and
Amiga_Original_Chip_Set
Data storage technology
slower, mechanical hard-disk drive. For this configuration to provide a significant speed advantage, an appropriate controller is needed that uses the
RAID
the series concluding in June 1987. In October and November 1987, a disk controller card was also published as "Project 1617". Over the next decade, about
Applix_1616
American data storage company
was making hard disk drive controllers, and in 1983, it won the contract to provide IBM with controllers for the PC/AT. That controller, the WD1003, became
Western_Digital
Line of home computers
redesigned 5-volt disk controller was introduced with its own new Disk BASIC ROM (v1.1). It adds a new command, DOS, to auto-boot software from disk (this requires
TRS-80_Color_Computer
Former American computer hardware company
products, especially their hard disk controller ICs. A major customer of Xebec was IBM, who used their disk controllers extensively in the PC XT in 1983
Xebec_Corporation
Data security technology
people or processes. Disk encryption uses disk encryption software or hardware to encrypt every bit of data that goes on a disk or disk volume. It is used
Disk_encryption
Microcomputer released in 1982
to install a disk controller with one or two internal 3.5" disk drives (the base system did not include a floppy disk controller or disk drives). The
Sony_SMC-70
Early portable microcomputer
head damage from rough handling.[citation needed] A single-density disk controller was used to keep costs down. In September 1981, Osborne Computer Company
Osborne_1
1982 DEC microcomputer
Corporation produced a Winchester disk controller capable of controlling hard disks compatible with the ST-506 interface. The controller, based on the Western Digital
Rainbow_100
Home video game console
was based on that of Nintendo's arcade game Donkey Kong (1981) and its controller design was reused from Nintendo's portable Game & Watch hardware. For
Nintendo_Entertainment_System
Floppy disk controller
The FD1771, sometimes WD1771, is a floppy disk controller chip, the first in a line of floppy disk controllers produced by Western Digital. It uses single
Western_Digital_FD1771
Topics referred to by the same term
(video game), a 1987 Konami arcade game Ajax (floppy disk controller), a floppy disk controller fitted to the Atari STE Ajax (programming), Asynchronous
Ajax
Floppy disk drive for the Commodore 64
contains a MOS Technology 6502 microprocessor, doubling as a disk controller and on-board disk operating system processor. The number of sectors per track
Commodore_1541
Prototype computer
after Bill Gardei) CSG 4151: DMAgic DMA controller (designed by Paul Lassa) F011C: FDC (floppy disk controller, also designed by Bill Gardei) The C65 also
Commodore_65
GEC operating system introduced in 1977
device driver for a disk controller is a process, which is responsible for issuing commands through Nucleus to the disk controller, and handling the interrupts
OS4000
Operating system focused on disk-based file operations
A disk operating system (DOS) is a computer operating system that requires a hard disk (HDD), floppy disk, solid-state drive (SSD), or other direct-access
Disk_operating_system
Series of British microcomputers by Acorn
replacement of the Intel 8271 floppy-disk controller with the Western Digital 1770: not only was the new controller mapped to different addresses, it is
BBC_Micro
Macintosh format disks. dd (Unix) Disk image Disk storage Don't Copy That Floppy Floppy disk controller Floppy disk format Floppy disk hardware emulator
Floppy_disk_variants
Series of modular microcomputer systems
optional keyboard. The Acorn System 3 added a floppy disk controller card, floppy disk drive, and disk operating system ROM, replacing the cassette interface
Acorn_System
1977 microcomputer by Tandy Corporation
to a disk machine necessitates installing at least 32 KB of RAM, the disk controller board, and another power supply for the disk drives. Disk upgrades
TRS-80
Family of personal computers sold by Commodore
Turbo, accelerator, RAM expansion, PC emulator A2091 / A590 SCSI hard disk controller + 2 MB RAM expansion A3070 SCSI tape backup unit with a capacity of
Amiga
take advantage of advanced disk I/O features in the system BIOS. It filtered interrupt 13h BIOS calls to the disk controller and directed them in the most
Microsoft_32-bit_disk_access
floppy drive to the old equipment by interfacing directly to the floppy disk controller, while storing data in another medium such as a USB thumb drive, Secure
Floppy_disk_hardware_emulator
Portable computer released in 1983
disk controller socket to the drive connector. This capability is unused by the included single-sided Western Digital FD1793 floppy-disk controller.
Osborne_Executive
Disk storage system
Components of a disk array include: Disk array controllers Cache in form of both volatile random-access memory and non-volatile flash memory. Disk enclosures
Disk_array
Main printed circuit board used for a computing device
onboard devices. Disk controllers for SATA drives, and historical PATA drives Historical floppy-disk controller Integrated graphics controller supporting 2D
Motherboard
British 8-bit microcomputer, 1977 to 1985
single density floppy disk controller card that could interfaced to either internal 5¼-inch or external 8-inch floppy disk drives. Disk capacity was 80 KB
Research_Machines_380Z
Computer bus used for data storage systems
the disk drive and controller; most of the time, however, 15 or 20 megabit ESDI disk drives were not downward compatible (i.e. a 15 or 20 megabit disk drive
Hard_disk_drive_interface
Any of a set of standard configurations of Redundant Arrays of Independent Disks
which disk failed, for only one redundant parity disk is needed to detect an error. These extra disks are truly "redundant" since most disk controllers can
Standard_RAID_levels
Series of computers sold in Japan by NEC
www.mm1.acidcave.net. Retrieved 2025-11-14. NEC μPD72070 - Floppy Disk Controller Specification Version 2.0 (PDF). 2.0 preliminary. NEC Corporation.
PC-8800_series
Accumulation of data corruption on a storage device over time
incidents. Most disk, disk controller and higher-level systems are subject to a slight chance of unrecoverable failure. With ever-growing disk capacities,
Data_degradation
Floppy disk controller
The Cromemco 4FDC floppy-disk controller is designed to interface both 5.25- and 8.0-inch floppy disk drives to the S-100 computer bus used in Cromemco
Cromemco_4FDC
Former American computer hardware company
December 1999. Floppy controller speeds access with cache Caching Disk Controller Relieves System Bottlenecks Disk Controller Unburdens Real Time Applications
Distributed Processing Technology
Distributed_Processing_Technology
Personal computer produced by Zenith Data Systems
connected the 10 MB removable cartridge hard disk, manufactured by Bull in Belfort A maximum of two disk controller cards can be installed in a standard system
Zenith_Z-89
Storage density for magnetic disks
die ersten 150000 Geräte verkauft haben. […] NEC μPD72070 - Floppy Disk Controller Specification Version 2.0 (PDF). 2.0 preliminary. NEC Corporation.
Disk_density
Intel chipset
chipset but with third party SATA disk controllers, 32-bit Windows XP AHCI drivers may still be supported by the disk controller vendor (non-Intel). A third
Intel_X79
magnetic disk storage devices from 1956 to 2003, when it sold its hard disk drive business to Hitachi. Both the hard disk drive (HDD) and floppy disk drive
History of IBM magnetic disk drives
History_of_IBM_magnetic_disk_drives
Technical document summarizing components
Front page of a floppy disk controller data sheet (1979)
Datasheet
DMA Controller/Central Arbiter, 82308 Micro Channel Bus Controller, 82309 Address Bus Controller, 82706 VGA Graphics Controller, 82077 Floppy Disk Controller
List_of_Intel_chipsets
ROM: 8 KB Keyboard: 83 keys MERA 7926M with numerical part Floppy disk controller: 8- or 5,25-inch Interfaces: 2× RS-232C, parallel port, printer interface
ComPAN_8
8-bit microprocessor
Programmable Interrupt Controller. 8257 – DMA Controller 8259 – Programmable Interrupt Controller 8271 – Programmable Floppy Disk Controller 8272 – Single/Double
Intel_8085
Type of computer data storage
performance acceleration services. In contrast to embedded software or disk controller firmware confined to a packaged storage system or appliance, the storage
Software-defined_storage
Microsoft server technology, 2008 to 2022
Windows PE booting is that it needs to include network drivers and disk controller drivers intended to work with the target hardware to be imaged. The
Windows_Deployment_Services
Computer storage device with no moving parts
This interface is managed by the SSD's controller and is often similar to those found in traditional hard disk drives (HDDs). Common interfaces include:
Solid-state_drive
Magnetic tape data storage format
Specification for Flexible Disk Controller Based Mini Data Cartridge Tape Drives") defines a method of using the Floppy disk controller in an IBM PC to control
Quarter-inch_cartridge
Desktop computer developed by Xerox
the 820: the 820 mainboard has a floppy disk controller (Western Digital FD1771) but no hard disk controller or any expansion bay capabilities, whereas
Xerox_820
BIOS interrupt call for disk access
IBM PC used a 16-bit Intel 8237 DMA controller, the DMA transfers used for transferring data to and from the disk system cannot cross a physical 64K address
INT_13H
some of the motherboard BIOS' hard disk controller driver in RAM. To allow access to the full size of any hard disk the software must be loaded before
Dynamic_drive_overlay
Series of networkable home computers
used 5.25" floppy disks. Dynamic RAM disk machines with 64 or 128 KB RAM followed soon after, with a WD2793 Floppy Disk Controller incorporated on the
MicroBee
Discontinued family of computer operating systems
equipped with a Shugart Associates 8-inch floppy-disk drive interfaced via a custom floppy-disk controller. It was written in Kildall's own PL/M (Programming
CP/M
trademark for a hard disk drive, disk controller, and host adapter on an expansion card for a personal computer. Typically a hard disk drive (HDD) installs
Hardcard
hard disk drives List of defunct hard disk manufacturers List of DRAM manufacturers List of solid-state drive manufacturers "Fusion-io Controller Products"
List of flash memory controller manufacturers
List_of_flash_memory_controller_manufacturers
Component of the Microsoft Windows operating system
system, chipset or have no set category (eg. Intel Management Engine, Disk controller, ACPI events) Video and Audio Capture devices: Devices used to route
Device_Manager
Home computer created by Amstrad
not support standard floppy disk drives through the built-in FDD connector, it uses a compatible floppy disk controller (a Zilog Z765a). Standard drives
Sinclair_PC200
Low level firmware interface to the hardware
elementary operations required to complete the task through the particular disk controller hardware that is connected to that drive. The program is freed from
BIOS_interrupt_call
Catweasel is a family of enhanced floppy-disk controllers from German company Individual Computers. These controllers are designed to allow more recent computers
Individual Computers Catweasel
Individual_Computers_Catweasel
sectors that crop up after manufacturing. Many disk/controller subsystems reserve storage to remap defective disk sectors. The drive automatically creates its
Internal hard drive defect management
Internal_hard_drive_defect_management
1982 home computer
assembled with a +2 style "datacorder" connected instead of the floppy disk controller. The power supply of the ZX Spectrum +2A uses the same pinout as the
ZX_Spectrum
Signetics microprocessor
hard disk controller in 1981. Western Digital used the 8X300 in their WD1000 ST506 hard disk controller and the 8X305 in their WD1001 ECC hard disk controller
Signetics_8X300
Second model of Apple's Macintosh computer line
512K was designed with no slots for upgrade boards and had no hard-disk controller, so the few internal upgrades that were available for the 512K, such
Macintosh_512K
1981 American microcomputer model
25″ floppy disk drives, storing 160 KB per disk side for a total of 320 KB of storage on one disk. The floppy drives require a controller card inserted
IBM_Personal_Computer
2025-12-04. "Compatible hard disk controllers, RAID controllers". hdsentinel.com. Retrieved 2025-12-04. "Compatible external hard disk, external enclosure, adapter"
Comparison of S.M.A.R.T. tools
Comparison_of_S.M.A.R.T._tools
IBM PC compatible home computer system
compatible with those on the TRS-80 Color Computer, an IBM-standard floppy-disk controller supporting two drives, and a parallel printer port, all integrated
Tandy_1000
Fourth model of Apple's Macintosh computer line
for the original Macintosh SE which included new ROM chips and a new disk controller chip, to replace the originals. Mini vMac Joel West (March 2, 1987)
Macintosh_SE
Computing concept
interface historical shortcomings. It is converted back to LBA by the disk controller, then, finally, to physical cylinder, head and sector numbers. The
Address_space
1980s kit computer from Elektor magazine
board, a 16/64 KB DRAM board and EPROM programmer board, and a floppy disk controller, as well as a dozen smaller boards for small improvements and interfaces
Elektor_Junior_Computer
Low-bandwidth computer motherboard bus
keyboard, PS/2 mouse, and floppy disk controller. Most PC motherboards with an LPC bus have either a Platform Controller Hub (PCH) or a southbridge chip
Low_Pin_Count
Personal computer released in 1983
2x32 KB one A 10 MB hard drive was included on most sub-models, with a disk controller featuring Xebec ICs PC DOS 2.0 was included The 5-pin DIN for the cassette
IBM_Personal_Computer_XT
Series of workstation computers
Multibus backplane and I/O controllers. The disk controller supports up to four 500MB hard drives. A 9-track tape controller was released. Early performance
Apollo/Domain
Computer released in 1984
retroactively named 8-bit ISA. The disk interface for the AT, originally a Seagate ST506 compatible interface on IBM's disk controller card, was updated and standardized
IBM_Personal_Computer_AT
Encoding methods for representing data on magnetic media
marketed double-density 5¼-inch disk drives (like the single-sided B51 and double-sided B52 drives) and a controller solution implementing GCR since early
Group_coded_recording
1978 US microcomputer
and Forth development system. Available hardware included a floppy disk controller and a backplane for expansion. Rockwell advertised the $375 AIM-65
AIM-65
1978 home computer system
Controller. https://github.com/RetroStack/Sorcerer_DreamDisk Morrow Designs (Thinker Toys) offered a specialized version of their S-100 based "Disk Jockey
Exidy_Sorcerer
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