JPS57164356A - Data save system before alteration of data processing system - Google Patents

Data save system before alteration of data processing system

Info

Publication number
JPS57164356A
JPS57164356A JP56049902A JP4990281A JPS57164356A JP S57164356 A JPS57164356 A JP S57164356A JP 56049902 A JP56049902 A JP 56049902A JP 4990281 A JP4990281 A JP 4990281A JP S57164356 A JPS57164356 A JP S57164356A
Authority
JP
Japan
Prior art keywords
data
save
before alteration
program
processing program
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
JP56049902A
Other languages
Japanese (ja)
Inventor
Shigemasa Endo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56049902A priority Critical patent/JPS57164356A/en
Publication of JPS57164356A publication Critical patent/JPS57164356A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/461—Saving or restoring of program or task context

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

PURPOSE:To reduce the number of times of access, by writing a save data including data before alteration with a save program to a save data area of a magnetic disc storage device, when a processing program reads the data before alteration from a data area. CONSTITUTION:A processing program P1 reads a data D1 before alteration to a data buffer in common use with a save data buffer B4 from a data cell C1. Just after the read, a save program P2 adds a control data before and after the data D1 before alteration to form a save data D3 and writes in it from the head of a save data area A2. Similarly, the processing program P1 reads a data D4 before alteration and the save program P2 writes a save data D6 from the next address of the save data D3 in a save data area A2 just after the read of the data D4. The processing program P1 changes the data D1 into a data D2 in the B4 and writes the D2 in a data cell C1. Similarly, the data D4 is changed into a data D5, which is written in a C2.
JP56049902A 1981-04-02 1981-04-02 Data save system before alteration of data processing system Pending JPS57164356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56049902A JPS57164356A (en) 1981-04-02 1981-04-02 Data save system before alteration of data processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56049902A JPS57164356A (en) 1981-04-02 1981-04-02 Data save system before alteration of data processing system

Publications (1)

Publication Number Publication Date
JPS57164356A true JPS57164356A (en) 1982-10-08

Family

ID=12843943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56049902A Pending JPS57164356A (en) 1981-04-02 1981-04-02 Data save system before alteration of data processing system

Country Status (1)

Country Link
JP (1) JPS57164356A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62257550A (en) * 1986-05-02 1987-11-10 Nec Corp Saving system for data base file

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62257550A (en) * 1986-05-02 1987-11-10 Nec Corp Saving system for data base file

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