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8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...
Similar to modchips, the legality of these methods is disputed.While they are often advertised for their ability to make legal backups and to be used to play legal homebrew software [2] and are considered a cheap method of development compared to purchasing official development kits, a backup device's potential for software piracy is a major concern to hardware and software manufacturers.
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 ...
Drawings from IBM Floppy Disk Drive Patents. IBM's decision in the late 1960s to use semiconductor memory as the writeable control store for future systems and control units created a requirement for an inexpensive and reliable read only device and associated medium to store and ship the control store's microprogram and at system power on to load the microprogram into the control store.
MS-DOS/PC DOS versions 4.0 and earlier assign letters to all of the floppy drives before considering hard drives, so a system with four floppy drives would call the first hard drive E:. Starting with DOS 5.0, the system ensures that drive C: is always a hard disk, even if the system has more than two physical floppy drives.
Pages in category "Floppy disk drives" The following 21 pages are in this category, out of 21 total. ... Code of Conduct; Developers; Statistics; Cookie statement;
The Tandon Corporation was an American disk drive and PC manufacturer founded in 1975 (incorporated in 1976 as Tandon Magnetics Corp.) [1] by Sirjang Lal Tandon, a former mechanical engineer. [2] [3] The company originally produced magnetic recording read/write heads for the then-burgeoning floppy-drive market. Due to the labor-intensive nature ...
Like most other Commodore disk drives, these drives utilize zone bit recording to maintain an average bit density across the entire disk. Formatted capacity is approximately 0.5 megabyte per side, or 1 megabyte (1,066,496 bytes) in 4166 blocks total. [4] [5] [7] The 8050 is a single-sided drive, whereas the 8250 and SFD-1001 are double-sided ...