JPS57195396A - Data storage control system - Google Patents

Data storage control system

Info

Publication number
JPS57195396A
JPS57195396A JP56079554A JP7955481A JPS57195396A JP S57195396 A JPS57195396 A JP S57195396A JP 56079554 A JP56079554 A JP 56079554A JP 7955481 A JP7955481 A JP 7955481A JP S57195396 A JPS57195396 A JP S57195396A
Authority
JP
Japan
Prior art keywords
data
storage area
flag
storage
channel
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
JP56079554A
Other languages
Japanese (ja)
Inventor
Takeshi Yamazaki
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 JP56079554A priority Critical patent/JPS57195396A/en
Publication of JPS57195396A publication Critical patent/JPS57195396A/en
Pending legal-status Critical Current

Links

Landscapes

  • Power Sources (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To read correct data out of storage parts after a main power source is recovered, by providing a couple of data storage areas and a flag area which can be changed in state every time storing operation ends.
CONSTITUTION: In the data storage area A of the channel CH1 of an RAM12, last frequency data is sotred and in the storage area B, up-to-date frequency data is stored; when the flag in a flag area F1 is set to 1, varied frequency data transferred to this channel is stored in the storage area A. If a main power source becomes abnormal during the storage of said data, incomplete data remains in the storage area A. Since said flag is still set to 1, the data in the storage area B is read out as effective data when frequency data is read out from this channel CH1 after the main power source recovers.
COPYRIGHT: (C)1982,JPO&Japio
JP56079554A 1981-05-26 1981-05-26 Data storage control system Pending JPS57195396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079554A JPS57195396A (en) 1981-05-26 1981-05-26 Data storage control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079554A JPS57195396A (en) 1981-05-26 1981-05-26 Data storage control system

Publications (1)

Publication Number Publication Date
JPS57195396A true JPS57195396A (en) 1982-12-01

Family

ID=13693222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079554A Pending JPS57195396A (en) 1981-05-26 1981-05-26 Data storage control system

Country Status (1)

Country Link
JP (1) JPS57195396A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62107329A (en) * 1985-11-05 1987-05-18 Toshiba Corp Document generating device
JPH0573431A (en) * 1991-09-17 1993-03-26 Nec Ic Microcomput Syst Ltd Storage circuit
US5668726A (en) * 1993-12-17 1997-09-16 Nippondenso Co, Ltd. Data backup apparatus utilized in an electronic control system and data backup method performed in the data backup apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62107329A (en) * 1985-11-05 1987-05-18 Toshiba Corp Document generating device
JPH0573431A (en) * 1991-09-17 1993-03-26 Nec Ic Microcomput Syst Ltd Storage circuit
US5668726A (en) * 1993-12-17 1997-09-16 Nippondenso Co, Ltd. Data backup apparatus utilized in an electronic control system and data backup method performed in the data backup apparatus

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