JPS5543681A - Floppy disk control system - Google Patents

Floppy disk control system

Info

Publication number
JPS5543681A
JPS5543681A JP11714678A JP11714678A JPS5543681A JP S5543681 A JPS5543681 A JP S5543681A JP 11714678 A JP11714678 A JP 11714678A JP 11714678 A JP11714678 A JP 11714678A JP S5543681 A JPS5543681 A JP S5543681A
Authority
JP
Japan
Prior art keywords
track
timer
signal
selector
specified
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.)
Granted
Application number
JP11714678A
Other languages
Japanese (ja)
Other versions
JPS615225B2 (en
Inventor
Kazuo Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11714678A priority Critical patent/JPS5543681A/en
Publication of JPS5543681A publication Critical patent/JPS5543681A/en
Publication of JPS615225B2 publication Critical patent/JPS615225B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To increase the life time of the floppy disk and thus to enhance the reliability by positioning forcedly the head to the specified track designated previously when no read/write is given to the floppy disk and thus limiting the abrasion of the magnetic surface only to the specified track.
CONSTITUTION: The seek signal is delivered from decorder 23 of floppy control unit 18 and applied to timer 24 and selector 28. And selector 28 selects the signals of signal line 25 as soon as timer 24 starts clocking, and the selected signal is supplied to track address register 35. And in case no subsequent signal is supplied even for the while longer than the set time of timer 24 after the last seek signal came in, timer 24 generates output 27. At the same time, selector 28 selects track number data line 26 sent from fixed constant generator 25 and then registers the specified number given from generator 25 to register 35 to shift the head to the specified track. Owing to this shift, the heas abrasion is limited only to the specific track, thus increasing the life time of the disk.
COPYRIGHT: (C)1980,JPO&Japio
JP11714678A 1978-09-22 1978-09-22 Floppy disk control system Granted JPS5543681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11714678A JPS5543681A (en) 1978-09-22 1978-09-22 Floppy disk control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11714678A JPS5543681A (en) 1978-09-22 1978-09-22 Floppy disk control system

Publications (2)

Publication Number Publication Date
JPS5543681A true JPS5543681A (en) 1980-03-27
JPS615225B2 JPS615225B2 (en) 1986-02-17

Family

ID=14704592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11714678A Granted JPS5543681A (en) 1978-09-22 1978-09-22 Floppy disk control system

Country Status (1)

Country Link
JP (1) JPS5543681A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991431A (en) * 1982-11-18 1984-05-26 Nippon Kogaku Kk <Nikon> Mirror driving device of camera
JPH01239609A (en) * 1988-03-22 1989-09-25 Okuma Mach Works Ltd System for controlling position of shaft by motor
US4987502A (en) * 1986-10-06 1991-01-22 Eastman Kodak Company Anti-wear disk drive system
US5010534A (en) * 1984-12-29 1991-04-23 Canon Kabushiki Kaisha Optical information recording-reproducing apparatus
US5050015A (en) * 1988-10-22 1991-09-17 Basf Aktiengesellschaft Method and arrangement for reducing wear in a magnetic storage means

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5991431A (en) * 1982-11-18 1984-05-26 Nippon Kogaku Kk <Nikon> Mirror driving device of camera
JPH0437623B2 (en) * 1982-11-18 1992-06-19 Nippon Kogaku Kk
US5010534A (en) * 1984-12-29 1991-04-23 Canon Kabushiki Kaisha Optical information recording-reproducing apparatus
US4987502A (en) * 1986-10-06 1991-01-22 Eastman Kodak Company Anti-wear disk drive system
JPH01239609A (en) * 1988-03-22 1989-09-25 Okuma Mach Works Ltd System for controlling position of shaft by motor
US5050015A (en) * 1988-10-22 1991-09-17 Basf Aktiengesellschaft Method and arrangement for reducing wear in a magnetic storage means

Also Published As

Publication number Publication date
JPS615225B2 (en) 1986-02-17

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