JPS5567922A - Magnetic disk driver - Google Patents

Magnetic disk driver

Info

Publication number
JPS5567922A
JPS5567922A JP14081278A JP14081278A JPS5567922A JP S5567922 A JPS5567922 A JP S5567922A JP 14081278 A JP14081278 A JP 14081278A JP 14081278 A JP14081278 A JP 14081278A JP S5567922 A JPS5567922 A JP S5567922A
Authority
JP
Japan
Prior art keywords
circuit
write
signal
write protection
state
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
Application number
JP14081278A
Other languages
Japanese (ja)
Inventor
Fusaki Miura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14081278A priority Critical patent/JPS5567922A/en
Publication of JPS5567922A publication Critical patent/JPS5567922A/en
Pending legal-status Critical Current

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 expand the application range of a device by maintaining only specific and random disk surfaces in an information-rewrite-inhibition state. CONSTITUTION:To NOR circuit 10 connecting to write function circuit 11, NOR circuit 8 is connected through inverter circuit 9, side-1 write protection detector 1 through NOR circuit 5 and side-1 write protection detection circuit 3, and side-2 write protection detector 2 through NOR circuit 6 and side-2 write protection detection circuit 4. Consequently, when write protective display is detected from any one side or both sides of a both-side magnetic diskette, input signal e5 or e6 to NOR circuit 10 is held at a high level and drive selective signal e8 and write signal e7 are put in an active state to hold at a low level write signal e10. As a result, write function circuit 11 is turned OFF to maintain a write disability state.
JP14081278A 1978-11-14 1978-11-14 Magnetic disk driver Pending JPS5567922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14081278A JPS5567922A (en) 1978-11-14 1978-11-14 Magnetic disk driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14081278A JPS5567922A (en) 1978-11-14 1978-11-14 Magnetic disk driver

Publications (1)

Publication Number Publication Date
JPS5567922A true JPS5567922A (en) 1980-05-22

Family

ID=15277304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14081278A Pending JPS5567922A (en) 1978-11-14 1978-11-14 Magnetic disk driver

Country Status (1)

Country Link
JP (1) JPS5567922A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62229425A (en) * 1986-03-31 1987-10-08 Toshiba Corp Write protect controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62229425A (en) * 1986-03-31 1987-10-08 Toshiba Corp Write protect controller

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