JPS5654666A - Floppy disk driving device - Google Patents
Floppy disk driving deviceInfo
- Publication number
- JPS5654666A JPS5654666A JP12986679A JP12986679A JPS5654666A JP S5654666 A JPS5654666 A JP S5654666A JP 12986679 A JP12986679 A JP 12986679A JP 12986679 A JP12986679 A JP 12986679A JP S5654666 A JPS5654666 A JP S5654666A
- Authority
- JP
- Japan
- Prior art keywords
- floppy disk
- writing
- driving device
- protection
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE:To realize the protection of writing with every single face, by detecting the writing inhibition mark provided on both faces of a floppy disk through the sensor corresponding to each face. CONSTITUTION:The inhibition marks on both faces of a floppy disk are detected by the phototransistors 18 and 27 of the sensors 6 and 25 corresponding to each face. And thus the binary logic detection output obtained by the transistors 22 and 31 give a control to the AND gate 23 to which the signals are applied via the AND gates 32 and 34 the open/close of which are controlled by the surface selection signal (c) plus the signal passed through the inverter 33. As a result, the protection of writing is given with every single face to ensure an effective use of the storage area of the disk. Furthermore, the write/read can be controlled with no use of two or more of the floppy disk driving device but by selecting the protection and nonprotection of writing via a unit of the driving device and even in case both the program and the data are stored on the surface and back faces each.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12986679A JPS5654666A (en) | 1979-10-11 | 1979-10-11 | Floppy disk driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12986679A JPS5654666A (en) | 1979-10-11 | 1979-10-11 | Floppy disk driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5654666A true JPS5654666A (en) | 1981-05-14 |
Family
ID=15020215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12986679A Pending JPS5654666A (en) | 1979-10-11 | 1979-10-11 | Floppy disk driving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5654666A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144397A1 (en) * | 1983-05-18 | 1985-06-19 | Drivetec Inc. | Flexible magnetic disk clamping and ejector mechanism |
| JPH04117714U (en) * | 1991-04-04 | 1992-10-21 | ニベツクス株式会社 | temperature adjustment device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51124414A (en) * | 1975-04-22 | 1976-10-29 | Mitsubishi Electric Corp | Protective apparatus for magnetic sheet |
| JPS5317775U (en) * | 1976-07-26 | 1978-02-15 |
-
1979
- 1979-10-11 JP JP12986679A patent/JPS5654666A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51124414A (en) * | 1975-04-22 | 1976-10-29 | Mitsubishi Electric Corp | Protective apparatus for magnetic sheet |
| JPS5317775U (en) * | 1976-07-26 | 1978-02-15 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144397A1 (en) * | 1983-05-18 | 1985-06-19 | Drivetec Inc. | Flexible magnetic disk clamping and ejector mechanism |
| JPH04117714U (en) * | 1991-04-04 | 1992-10-21 | ニベツクス株式会社 | temperature adjustment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5593162A (en) | Central control device for recorder | |
| JPS5654666A (en) | Floppy disk driving device | |
| GB1125265A (en) | Record reader | |
| JPS53144707A (en) | Signal detecting system by variable thresholds | |
| JPS5613585A (en) | Semiconductor memory circuit | |
| GB1365199A (en) | Apparatus for the automatic analysisi of diagram charts | |
| JPS5710825A (en) | Method and apparatus for maintaining secrecy of data, program, circuit and the like | |
| SU369562A1 (en) | DEVICE FOR INPUT OF INFORMATION | |
| EP0340988A3 (en) | A memory card and an apparatus for processing the same | |
| JPS55146638A (en) | Magnetic recording and reproducing device | |
| GB1331812A (en) | Neutron detector | |
| GB934598A (en) | Data storage system | |
| JPS54122931A (en) | Recorder | |
| JPS5473605A (en) | Azimuth recording method using double film | |
| GB1246344A (en) | Apparatus for sensing and counting coded areas | |
| JPS5485709A (en) | Recording medium controller | |
| JPS53127706A (en) | Detection system of read drop-out of final data block | |
| JPS6425347A (en) | Flexible disk device | |
| JPS5452513A (en) | Write control system of floppy disc apparatus | |
| JPS57206988A (en) | Data processor | |
| JPS52125232A (en) | Mark reading in unit | |
| JPS5399828A (en) | Integrated memory | |
| JPS576441A (en) | Optical recorder and reproducer having formatting function | |
| JPS573163A (en) | Floppy disc device | |
| JPS5555479A (en) | Magnetic disc driver |