JPS57200980A - Address collating system for file system input/output device - Google Patents

Address collating system for file system input/output device

Info

Publication number
JPS57200980A
JPS57200980A JP8436081A JP8436081A JPS57200980A JP S57200980 A JPS57200980 A JP S57200980A JP 8436081 A JP8436081 A JP 8436081A JP 8436081 A JP8436081 A JP 8436081A JP S57200980 A JPS57200980 A JP S57200980A
Authority
JP
Japan
Prior art keywords
gap
address
output device
address part
decision
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
JP8436081A
Other languages
Japanese (ja)
Inventor
Chihiro Tsuchiya
Toshihiko Matsuda
Mitsuo Yoshida
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 JP8436081A priority Critical patent/JPS57200980A/en
Publication of JPS57200980A publication Critical patent/JPS57200980A/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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To execute collation and decision in a microprogram system, by providing a gap between an address part and a data part, which have been recorded in a rotary recording medium, and collating an address in this gap period. CONSTITUTION:1 period on a medium in case when a rotary body has been used as a recording medium is set to 1 track, and in a sector format of a sector which has divided said track to data transfer units, a gap (G1) 8 is provided between an error detecting code IDCRC4 of an address part, and a code for showing a data start point DSYNC5. The gap length of G1 is set to sufficient length to the time required for collation and decision of ID information by a microprogram (the number of microsteps X the time for 1 step) after the address part ID has been read out.
JP8436081A 1981-06-03 1981-06-03 Address collating system for file system input/output device Pending JPS57200980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8436081A JPS57200980A (en) 1981-06-03 1981-06-03 Address collating system for file system input/output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8436081A JPS57200980A (en) 1981-06-03 1981-06-03 Address collating system for file system input/output device

Publications (1)

Publication Number Publication Date
JPS57200980A true JPS57200980A (en) 1982-12-09

Family

ID=13828348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8436081A Pending JPS57200980A (en) 1981-06-03 1981-06-03 Address collating system for file system input/output device

Country Status (1)

Country Link
JP (1) JPS57200980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018862A (en) * 1983-07-11 1985-01-30 Hitachi Ltd Information recording and reproducing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51111320A (en) * 1975-03-26 1976-10-01 Hitachi Ltd Magnetic memory

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51111320A (en) * 1975-03-26 1976-10-01 Hitachi Ltd Magnetic memory

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018862A (en) * 1983-07-11 1985-01-30 Hitachi Ltd Information recording and reproducing device

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