JPS5459041A - External memory device - Google Patents

External memory device

Info

Publication number
JPS5459041A
JPS5459041A JP12631077A JP12631077A JPS5459041A JP S5459041 A JPS5459041 A JP S5459041A JP 12631077 A JP12631077 A JP 12631077A JP 12631077 A JP12631077 A JP 12631077A JP S5459041 A JPS5459041 A JP S5459041A
Authority
JP
Japan
Prior art keywords
byte
setter
sector
track
display
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
JP12631077A
Other languages
Japanese (ja)
Inventor
Hiroshi Onodera
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12631077A priority Critical patent/JPS5459041A/en
Publication of JPS5459041A publication Critical patent/JPS5459041A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To realize an optional setter constitution with the same hard system and everg track by constituting the information track with the track description part and others containing the setter number byte and the sector length byte.
CONSTITUTION: The code format on track TR of the external memory device consists of index mark point IDX, gap byte part G1 formed between IDX and track description part TD, gap byte part G3 between records, and setter parts SEC1W SECn. While TD comprises flag byte F1 to display the TR state, cylinder/head byte C/H to display the cylinder and head addresses, setter number byte SN to display the setter number existing within TR, sector chart byte SL, and check byte CK. Both the sector number and the sector length on a certain TR can set logically the sector of the data length designated by SL of TD by the SN number of TD
COPYRIGHT: (C)1979,JPO&Japio
JP12631077A 1977-10-19 1977-10-19 External memory device Pending JPS5459041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12631077A JPS5459041A (en) 1977-10-19 1977-10-19 External memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12631077A JPS5459041A (en) 1977-10-19 1977-10-19 External memory device

Publications (1)

Publication Number Publication Date
JPS5459041A true JPS5459041A (en) 1979-05-12

Family

ID=14932010

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12631077A Pending JPS5459041A (en) 1977-10-19 1977-10-19 External memory device

Country Status (1)

Country Link
JP (1) JPS5459041A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04159662A (en) * 1990-10-23 1992-06-02 Iryo Joho Syst Kaihatsu Center File system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04159662A (en) * 1990-10-23 1992-06-02 Iryo Joho Syst Kaihatsu Center File system

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