JPS55105810A - Head switching system - Google Patents

Head switching system

Info

Publication number
JPS55105810A
JPS55105810A JP1032779A JP1032779A JPS55105810A JP S55105810 A JPS55105810 A JP S55105810A JP 1032779 A JP1032779 A JP 1032779A JP 1032779 A JP1032779 A JP 1032779A JP S55105810 A JPS55105810 A JP S55105810A
Authority
JP
Japan
Prior art keywords
circuit
erasion
writing
signal
selection signal
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
JP1032779A
Other languages
Japanese (ja)
Other versions
JPS6325404B2 (en
Inventor
Masaki Sano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1032779A priority Critical patent/JPS55105810A/en
Publication of JPS55105810A publication Critical patent/JPS55105810A/en
Publication of JPS6325404B2 publication Critical patent/JPS6325404B2/ja
Granted 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

  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE:To eliminate the loss time from the end of writing through the end of erasion by securing the latching of the head selection signal until the end of erasion. CONSTITUTION:With delivery of writing enable signal (b), the output of OR circuit 14 becomes ''1'' along with waveform d. And thus the head selection signal is latched to latch circuit 15 to prevent the head switching at the writing time. After the end of writing, erasing action signal c is generated for a fixed time in order to secure te complete erasion. And with supply of signal c to circuit 14, the head selection signal is latched continuously by circuit 15 until the end of erasion. Then circuit 15 is released at the moment when the erasion is over. Accordingly, the CPU becomes possible for the access to other circuit, thus eliminating the loss time.
JP1032779A 1979-02-02 1979-02-02 Head switching system Granted JPS55105810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1032779A JPS55105810A (en) 1979-02-02 1979-02-02 Head switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1032779A JPS55105810A (en) 1979-02-02 1979-02-02 Head switching system

Publications (2)

Publication Number Publication Date
JPS55105810A true JPS55105810A (en) 1980-08-13
JPS6325404B2 JPS6325404B2 (en) 1988-05-25

Family

ID=11747112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1032779A Granted JPS55105810A (en) 1979-02-02 1979-02-02 Head switching system

Country Status (1)

Country Link
JP (1) JPS55105810A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260463A (en) * 1985-05-14 1986-11-18 Hitachi Ltd Magnetic recording and reproducing device
JPS6275903A (en) * 1985-09-27 1987-04-07 Canon Electronics Inc Magnetic disk recording device
JPS62202302A (en) * 1986-02-28 1987-09-07 Teac Co Both-side type magnetic disk device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260463A (en) * 1985-05-14 1986-11-18 Hitachi Ltd Magnetic recording and reproducing device
JPS6275903A (en) * 1985-09-27 1987-04-07 Canon Electronics Inc Magnetic disk recording device
JPS62202302A (en) * 1986-02-28 1987-09-07 Teac Co Both-side type magnetic disk device

Also Published As

Publication number Publication date
JPS6325404B2 (en) 1988-05-25

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