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1. #Mitsumi quick disk portable
2. #Mitsumi quick disk software
3. #Mitsumi quick disk Pc
4. #Mitsumi quick disk windows

Generally, there are two levels of modifications:Ĭommercial nonwriteable Flippy disk with no write notches and two jacket index windows Compute! published an article on the topic in March 1981. TRS-80 on one side and Apple on the other.

#Mitsumi quick disk software

Many commercial publishers of computer software (mainly, relatively small programs like arcade games that could fit on a single-sided floppy disk) distributed their products on flippy disks formatted for two different brands of computer, e.g.

#Mitsumi quick disk Pc

The external drives were available as PC Card Type II and with USB interface.Ī flippy disk (sometimes known as a "flippy") is a double-sided ​ 5 1⁄ 4-inch floppy disk, specially modified so that the two sides can be used independently (but not simultaneously) in single-sided drives. Much later, another 2-inch (case size: 54.5 mm × 50.2 mm × 2.0 mm) miniature disk format was Iomega's PocketZip (originally named Clik!), introduced in 1999. This was due in part to the scarcity of other devices using this drive making it impractical for software transfer, and high media cost which was much more than 3½-inch and 5¼-inch disks of the time. Although the media exhibited nearly identical performance to the 3½-inch disks of the time, they were not very successful. They are used exclusively in the Zenith MinisPORT laptop computer circa 1989. Double-sided mechanisms were introduced on the later PCW 8512 and PCW 9512, thus removing the need to remove, flip, and then reinsert the disk.Īnother 2-inch format, the LT-1, is digitally formatted-720 kB, 245 TPI, 80 tracks/side, double-sided, double-density.

On the early Amstrad machines (the CPC line and the PCW 8256), the disks are typically flipped over to change the side (acting like 2 separate single-sided disks, comparable to the "flippy disks" of ​ 5 1⁄ 4-inch media) as opposed to being contiguously double-sided. The actual 3-inch magnetic-coated disk occupies less than 50% of the space inside the casing, the rest being used by the complex protection and sealing mechanisms implemented on the disks, which thus are largely responsible for the thickness, length, and relatively high costs of the disks. One example is the more elongated plastic casing, taller than a ​ 3 1⁄ 2-inch disk, but less wide and thicker (i.e. Three-inch diskettes bear much similarity to the ​ 3 1⁄ 2-inch size, but with some unique features. Despite this, the format was not a major success. It was also adopted by some other manufacturers/systems such as Sega, the Tatung Einstein, and Timex of Portugal in the FDD and FDD-3000 disk drives. The format was widely used by Amstrad in their CPC and PCW computers, and (after Amstrad took over manufacture of the line) the Sinclair ZX Spectrum +3. Hitachi was a manufacturer of 3-inch disk drives, and stated in advertisements, "It's clear that the 3" floppy will become the new standard." The 3-inch "Compact Floppy Disk" or "CF-2" was an intended rival to Sony's 3.5" floppy system introduced by a consortium of manufacturers led by Matsushita. 3-inch "MCD-1 Micro Cassette"įile:CPC6128 loading Turbo Esprit from floppy disk.flac Originally, Educational Microcomputer Systems (EMS) announced a system using this drive as well, but later changed plans to use 3½-inch diskette drives instead. It was also offered in limited quantity with some PDP-11/23-based workstations by General Scientific Corporation.

#Mitsumi quick disk portable

Since August 1984, it was used in the Seequa Chameleon 325, an early CP/M-80 & MS-DOS portable computer with both Z processors. It could work with standard controllers for 5¼-inch floppy disks. The Microfloppy Disk Drive TC 500 was a single-sided quad-density drive with a nominal storage capacity of 500 KB (80 tracks, 140 tpi, 16 sectors, 300 rpm, 250 kbit/s, 9,250 bpi with MFM). The diskettes were named Dysan 3¼" Flex Diskette (P/N 802950), Tabor 3¼" Flex Diskette (P/N D3251), sometimes also nicknamed "Tabor" or "Brown" at tradeshows. Another unsuccessful diskette variant was the Drivette, a 3¼-inch diskette drive marketed by Tabor Corporation of Westland, Massachusetts, USA between 19 with media supplied by Dysan, Brown and 3M.