Each side also had a dedicated write-protect hole, which may be implemented differently from manufacturer to manufacturer.ģ” disks are commonly labelled either CF2 (single density) or CF2DD (double density). Because the two sides are independent of each other they are labelled either ‘A’ and ‘B’, or ‘1’ and ‘2’ to help distinguish between them. This means that single-sided disk drives can still read both sides by flipping the disk. These disks are double sided, but with each side re maining independent. Used for data storage and backup.ĭisks: Amsoft, Maxell, Matsushita, Tatung These are the Tatung Einstein, Sega SF-7000, Osborne and several Amstrad models including the ZX Spectrum +3, PCW 8512, 8256, 9512, CPC 6128.Ī limited number of individual users and small organisations. Only a few machines have inb uilt 3” drives.
Amstrad computers, which included a 3” drive, stopped being produced in the late 1990s A detailed step-by-step can be found here (again in Japanese).Never reached huge popularity due to dominance of 3.5” disks and then declined in 1990s. An image of a Quick Disk is first made on a SD card, then you can directly run the game of this disk image. However, if you are the lucky owner of a MSX game on Quick Disk, you can be interested in the VirtuaQD hardware emulator (Japanese site), which emulates also the Famicom Disk System. In case of malfunctioning, the Quick Disk Drive needs a new belt, with the following specifications: square shape diameter 40mm and 1.2mm thick.Īs this media has been rarely used on the MSX system, none of the MSX emulators has support for it. The Quick Disk interface cartridge will provide a ROM with special QuickDisk BASIC commands This makes QD much slower then competing disk storage systems.ĭeleting files is also a problem, and you can only delete the last file or format the disk and start from scratch. Data is recorded in a spiral and the whole disk needs to be scanned to do a directory listing. Instead of using tracks like regular disks, and a file system with directory, it is more similar to tape. The medium is sometimes also called 3.0 inch which refers to the hard plastic casing.Īn unformated disk has 64kB on each side. This media is called 2.8 inch which probably refers to the size of the medium inside the hard plastic case. QD compared to the disk of Family Computer Disk System Specifications Sharp, Casio and Canon for some Japanese word processors.ĭisks of the Family Computer Disk System for NES (Nintendo) are Quick Disks with a longer casing. Yamaha, Roland, Korg, Akai and Kawai have used it for their synthesizer, sampler, sequencer and some other sound equipment. The Sharp MZ-1500 computer has a built-in Quick Disk Drive. Some other companies have used the Quick Drive outside the MSX standard. Instead the market widely adopted the 3.5 inch diskette format.
#Mitsumi quick disk transport full
Only a hand full of MSX software titles were released on this format in Japan and Italy. When using the R800 mode, is looses synchronisation and you get an I/O error message on the screen.
#Mitsumi quick disk transport serial
The Quick Disk uses a Z8440 Serial Input/Output Controller at a certain clock speed, it lacks the WR signal because it is synchronised with the clock of the Z80. This storage device can be used with any MSX generation, but when used with Turbo R machines, it's limited to the Z80 mode (which implies booting while pressing the "1" key until you can hear a beep). Both the drives and the media are quite rare now. This format never really caught on in the MSX world. A Quick Disk (QD) is a magnetic disk of 2.8" designed by Hitachi Maxell, Ltd, and the drive was designed by Mitsumi Electric Co., Ltd in 1984.
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