floppy disk controller - definição. O que é floppy disk controller. Significado, conceito
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O que (quem) é floppy disk controller - definição

CIRCUITRY THAT CONTROLS READING FROM AND WRITING TO A COMPUTER'S FLOPPY DISK DRIVE
Floppy Disk Controller; Intel 82072A; Intel 82072; NEC µPD765; NEC uPD765; Floppy controllers; 3 mode; 3-mode; 3mode; Floppy disk controller; NEC D765; NEC 765; NEC 765A; NEC D765A; NEC µPD765A; ΜPD765; ΜPD765A; NEC uPD765A; UPD765; UPD765A; D765A; Intel 8072A; NEC μPD765; NEC μPD765A; Floppy controller; FDC controller; Philips interface bus; Floppy diskette controller; Diskette controller; Floppy disk drive controller; 2HC
  • FDC board from an [[IBM 5150]]. The NEC D765AC FDC IC is the large [[dual in-line package]] at the top.
  • A setup disk of Japanese [[Microsoft Office]] 4.3, provided with 3.5" 1.2 MB and 1440 KB formats.

Floppy-disk controller         
A floppy-disk controller (FDC) has evolved from a discrete set of components on one or more circuit boards to a special-purpose integrated circuit (IC or "chip") or a component thereof. An FDC directs and controls reading from and writing to a computer's floppy disk drive (FDD).
floppy         
  • 8-inch floppy disk
  • Inside an 8-inch floppy disk
  • Rear side of a 3½-inch floppy disk in a transparent case, showing its internal parts
  • Two boxes of about 80 floppy disks together with one USB memory stick. The stick is capable of holding over 130 times as much data as the two boxes of disks put together.
  • read-write head]] from a 3½‑inch unit
  • CD]], [[tape drive]], and [[CompactFlash]])
  • Front and rear of a retail 3½-inch and 5¼-inch floppy disk cleaning kit, as sold in Australia at retailer Big W, circa early 1990s
  • 8-inch floppy disk,<br /> inserted in drive,<br />(3½-inch floppy diskette,<br /> in front, shown for scale)
  • 2}}-inch floppy disk drive
  • 2}}-inch drives
  • 3½-inch, high-density floppy diskettes with adhesive labels affixed
  •  The [[write protection]] tab (unlabeled) in upper left.}}
  • The spindle motor from a 3½‑inch unit
  • floppy hardware emulator]], same size as a 3½-inch drive, provides a USB interface to the user.
  • [[Imation]] USB floppy drive, model 01946: an external drive that accepts high-density disks
  • How the read-write head is applied on the floppy
  • Screenshot depicting a floppy disk as "save" icon
  • converts single-sided 5¼-inch diskettes to double-sided]].
  • Visualization of magnetic information on floppy disk (image recorded with CMOS-MagView)
REMOVABLE DISK STORAGE MEDIUM
Diskette; Floppy drive; Floppy disc; Floppy-disk drive; Stiffy disk; Mini disk; Disquette; Floppy disks; Diskettes; 3.5 floppy; Floppy diskette; Floppies; 3.5" Floppy disk; 3.5" inch floppy drive; 3.5" Floppy Disk; Flexible disk; 3.5"; 1.44M; 1.2M; 5.25"; Microfloppy; 720K; 360K; High-Density Disk; Floppy Disk; MiniDisk; 3.5" floppy Disk; 3.5" floppy disk; 5.25" Floppy disk; Floppy discs; Mini Disk; Floopy disk; Floppy Drive; Floppy Disk drives; Minifloppy; PC floppy disks; Soft sectored; 5¼-inch disk; High-capacity floppy; 3.5" floppy; 51/4-inch disk; Floppy drives; Live Floppy; Micro diskette; 5" floppy; 5-1/4" floppy disk; 5.25" disk; 8-inch floppy disk; 5.25-inch floppy disk; Floppy disc drive; 3.5 inch floppy; 💾; 3.5" floppy disc; Floppy; 5.25" floppy disk; 3½ inch floppy; 3½-inch floppy; 3½-inch floppy disk; 3½ inch floppy disk; 3.5 inch floppy disk; 3.5-inch floppy disk; 3.5-inch floppy; Floopy disk drive; 5¼in floppy disk; 5¼"; 5¼" floppy; 5¼ inch floppy disk; 5¼in floppy; 5¼ inch floppy; 5¼" floppy disk; 5¼ inch; 5¼in; 3½in floppy disk; 3½" floppy; 3½" floppy disk; 3½in floppy; 3½"; 3½ inch; 3½in; 8in floppy disk; 8 inch floppy disk; 8" floppy; 8" floppy disk; 8in floppy; 8 inch floppy; 8" floppy drive; 5¼" floppy drive; 3½" floppy drive; 8.0"; 8"; 8-inch floppy; Maxi disk; Maxi diskette; Maxi floppy; Maxi-disk; Maxi-diskette; Maxi-floppy; Maxi-Disk; Maxi-Diskette; Maxi-Floppy; Maxidisk; Maxifloppy; Micro disk; Micro floppy; Micro-disk; Micro-diskette; Micro-floppy; Micro-Disk; Micro-Diskette; Micro-Floppy; Microdisk; Mini diskette; Mini floppy; Mini-disk; Mini-diskette; Mini-floppy; Mini-Disk; Mini-Diskette; Mini-Floppy; Minidisk (floppy); 5.25 inch floppy disks; 🖪; 🖫; 🖬; 5.25" floppy; Hyper drive (floppy); Extra-high density; Disquete; Floppy Disc; 3.5" disk; 5.25-inch disk; 5.25 inch disks; Floppy disk drive; 5.25-inch floppy
floppy disk         
  • 8-inch floppy disk
  • Inside an 8-inch floppy disk
  • Rear side of a 3½-inch floppy disk in a transparent case, showing its internal parts
  • Two boxes of about 80 floppy disks together with one USB memory stick. The stick is capable of holding over 130 times as much data as the two boxes of disks put together.
  • read-write head]] from a 3½‑inch unit
  • CD]], [[tape drive]], and [[CompactFlash]])
  • Front and rear of a retail 3½-inch and 5¼-inch floppy disk cleaning kit, as sold in Australia at retailer Big W, circa early 1990s
  • 8-inch floppy disk,<br /> inserted in drive,<br />(3½-inch floppy diskette,<br /> in front, shown for scale)
  • 2}}-inch floppy disk drive
  • 2}}-inch drives
  • 3½-inch, high-density floppy diskettes with adhesive labels affixed
  •  The [[write protection]] tab (unlabeled) in upper left.}}
  • The spindle motor from a 3½‑inch unit
  • floppy hardware emulator]], same size as a 3½-inch drive, provides a USB interface to the user.
  • [[Imation]] USB floppy drive, model 01946: an external drive that accepts high-density disks
  • How the read-write head is applied on the floppy
  • Screenshot depicting a floppy disk as "save" icon
  • converts single-sided 5¼-inch diskettes to double-sided]].
  • Visualization of magnetic information on floppy disk (image recorded with CMOS-MagView)
REMOVABLE DISK STORAGE MEDIUM
Diskette; Floppy drive; Floppy disc; Floppy-disk drive; Stiffy disk; Mini disk; Disquette; Floppy disks; Diskettes; 3.5 floppy; Floppy diskette; Floppies; 3.5" Floppy disk; 3.5" inch floppy drive; 3.5" Floppy Disk; Flexible disk; 3.5"; 1.44M; 1.2M; 5.25"; Microfloppy; 720K; 360K; High-Density Disk; Floppy Disk; MiniDisk; 3.5" floppy Disk; 3.5" floppy disk; 5.25" Floppy disk; Floppy discs; Mini Disk; Floopy disk; Floppy Drive; Floppy Disk drives; Minifloppy; PC floppy disks; Soft sectored; 5¼-inch disk; High-capacity floppy; 3.5" floppy; 51/4-inch disk; Floppy drives; Live Floppy; Micro diskette; 5" floppy; 5-1/4" floppy disk; 5.25" disk; 8-inch floppy disk; 5.25-inch floppy disk; Floppy disc drive; 3.5 inch floppy; 💾; 3.5" floppy disc; Floppy; 5.25" floppy disk; 3½ inch floppy; 3½-inch floppy; 3½-inch floppy disk; 3½ inch floppy disk; 3.5 inch floppy disk; 3.5-inch floppy disk; 3.5-inch floppy; Floopy disk drive; 5¼in floppy disk; 5¼"; 5¼" floppy; 5¼ inch floppy disk; 5¼in floppy; 5¼ inch floppy; 5¼" floppy disk; 5¼ inch; 5¼in; 3½in floppy disk; 3½" floppy; 3½" floppy disk; 3½in floppy; 3½"; 3½ inch; 3½in; 8in floppy disk; 8 inch floppy disk; 8" floppy; 8" floppy disk; 8in floppy; 8 inch floppy; 8" floppy drive; 5¼" floppy drive; 3½" floppy drive; 8.0"; 8"; 8-inch floppy; Maxi disk; Maxi diskette; Maxi floppy; Maxi-disk; Maxi-diskette; Maxi-floppy; Maxi-Disk; Maxi-Diskette; Maxi-Floppy; Maxidisk; Maxifloppy; Micro disk; Micro floppy; Micro-disk; Micro-diskette; Micro-floppy; Micro-Disk; Micro-Diskette; Micro-Floppy; Microdisk; Mini diskette; Mini floppy; Mini-disk; Mini-diskette; Mini-floppy; Mini-Disk; Mini-Diskette; Mini-Floppy; Minidisk (floppy); 5.25 inch floppy disks; 🖪; 🖫; 🖬; 5.25" floppy; Hyper drive (floppy); Extra-high density; Disquete; Floppy Disc; 3.5" disk; 5.25-inch disk; 5.25 inch disks; Floppy disk drive; 5.25-inch floppy
<hardware, storage> (Or "floppy", "diskette") A small, portable plastic disk coated in a magnetisable substance used for storing computer data, readable by a computer with a floppy disk drive. The physical size of disks has shrunk from the early 8 inch, to 5 1/4 inch ("minifloppy") to 3 1/2 inch ("microfloppy") while the data capacity has risen. These disks are known as "floppy" disks (or diskettes) because the disk is flexible and the read/write head is in physical contact with the surface of the disk in contrast to "{hard disks}" (or winchesters) which are rigid and rely on a small fixed gap between the disk surface and the heads. Floppies may be either single-sided or double-sided. 3.5 inch floppies are less floppy than the larger disks because they come in a stiff plastic "envelope" or case, hence the alternative names "stiffy" or "crunchy" sometimes used to distinguish them from the floppier kind. The following formats are used on IBM PCs and elsewhere: Capacity Density Width 360K double 5.25" 720K double 3.5" 1.2M high 5.25" 1.44M high 3.5" Double denisty and high density are usually abbreviated DD and HD. HD 3.5 inch disks have a second hole in the envelope and an overlapping "HD" logo. (1996-08-23)

Wikipédia

Floppy-disk controller

A floppy-disk controller (FDC) has evolved from a discrete set of components on one or more circuit boards to a special-purpose integrated circuit (IC or "chip") or a component thereof. An FDC directs and controls reading from and writing to a computer's floppy disk drive (FDD). The FDC is responsible for reading data presented from the host computer and converting it to the drive's on-disk format using one of a number of encoding schemes, like FM encoding (single density) or MFM encoding (double density), and reading those formats and returning it to its original binary values.

Depending on the platform, data transfers between the controller and host computer would be controlled by the computer's own microprocessor, or an inexpensive dedicated microprocessor like the MOS 6507 or Zilog Z80. Early controllers required additional circuitry to perform specific tasks like providing clock signals and setting various options. Later designs included more of this functionality on the controller and reduced the complexity of the external circuitry; single-chip solutions were common by the later 1980s.

By the 1990s, the floppy disk was increasingly giving way to hard drives, which required similar controllers. In these systems, the controller also often combined a microcontroller to handle data transfer over standardized connectors like SCSI and IDE that could be used with any computer. In more modern systems, the FDC, if present at all, is typically part of the many functions provided by a single super I/O chip.