JPS6431449U - - Google Patents

Info

Publication number
JPS6431449U
JPS6431449U JP12617487U JP12617487U JPS6431449U JP S6431449 U JPS6431449 U JP S6431449U JP 12617487 U JP12617487 U JP 12617487U JP 12617487 U JP12617487 U JP 12617487U JP S6431449 U JPS6431449 U JP S6431449U
Authority
JP
Japan
Prior art keywords
auxiliary storage
page
port
memory
port memory
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
JP12617487U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP12617487U priority Critical patent/JPS6431449U/ja
Publication of JPS6431449U publication Critical patent/JPS6431449U/ja
Pending legal-status Critical Current

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Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係るメモリ・システムの一実
施例を示す構成図、第２図ないし第５図は動作を
説明するための図、第６図は本考案における他の
動作例を説明するための図である。 １……２ポート・メモリ、２……シフトレジス
タ、３……補助記憶装置、４……制御装置、５…
…バツクアツプ電源、６……中央処理装置、７…
…バス。 FIG. 1 is a block diagram showing one embodiment of a memory system according to the present invention, FIGS. 2 to 5 are diagrams for explaining the operation, and FIG. 6 is a diagram for explaining another example of the operation of the present invention. This is a diagram for 1... 2-port memory, 2... shift register, 3... auxiliary storage device, 4... control device, 5...
...Backup power supply, 6...Central processing unit, 7...
…bus.

Claims (1)

【実用新案登録請求の範囲】 メモリのアドレス空間を固定長に分割した複数
のページからなる２ポート・メモリと、 この２ポート・メモリの内容を格納する不揮発
性の補助記憶装置と、 前記２ポート・メモリへの書き込みアクセスを
検出し、前記補助記憶装置にページ単位で格納す
るよう制御する制御装置と、 停電時に所定の時間だけ必要な部分に電源を供
給するバツクアツプ電源と を具備し、常時は２ポート・メモリと補助記憶装
置の内容の不一致が所定のページ範囲になるよう
に抑えつつ２ポート・メモリの一方のポートから
の書き込み内容をページ単位に他方のポートから
補助記憶装置へ転送するようにすると共に、電源
断時には前記不一致ページの内容を２ポート・メ
モリより補助記憶装置へ転送するようにしたこと
を特徴とするメモリ・システム。[Claims for Utility Model Registration] A two-port memory consisting of a plurality of pages obtained by dividing a memory address space into fixed lengths, a nonvolatile auxiliary storage device that stores the contents of the two-port memory, and the two ports. - Equipped with a control device that detects write access to memory and controls storage in page units in the auxiliary storage device, and a backup power supply that supplies power to the necessary parts for a predetermined period of time in the event of a power outage. The content written from one port of the 2-port memory is transferred page by page from the other port to the auxiliary storage while suppressing the discrepancy between the contents of the 2-port memory and the auxiliary storage to a predetermined page range. and the content of the mismatched page is transferred from the two-port memory to the auxiliary storage device when the power is turned off.
JP12617487U 1987-08-19 1987-08-19 Pending JPS6431449U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12617487U JPS6431449U (en) 1987-08-19 1987-08-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12617487U JPS6431449U (en) 1987-08-19 1987-08-19

Publications (1)

Publication Number Publication Date
JPS6431449U true JPS6431449U (en) 1989-02-27

Family

ID=31377446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12617487U Pending JPS6431449U (en) 1987-08-19 1987-08-19

Country Status (1)

Country Link
JP (1) JPS6431449U (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819949A (en) * 1981-07-28 1983-02-05 Fujitsu Ltd Data write and read system
JPS58194187A (en) * 1982-05-06 1983-11-12 Mitsubishi Electric Corp Memory device
JPS6121542A (en) * 1984-07-10 1986-01-30 Matsushita Electric Ind Co Ltd Data transfer device
JPS61243550A (en) * 1985-04-22 1986-10-29 Nec Corp Data saving system of semiconductor memory device
JPS6275856A (en) * 1985-09-30 1987-04-07 Hitachi Ltd Nonvolatile memory device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819949A (en) * 1981-07-28 1983-02-05 Fujitsu Ltd Data write and read system
JPS58194187A (en) * 1982-05-06 1983-11-12 Mitsubishi Electric Corp Memory device
JPS6121542A (en) * 1984-07-10 1986-01-30 Matsushita Electric Ind Co Ltd Data transfer device
JPS61243550A (en) * 1985-04-22 1986-10-29 Nec Corp Data saving system of semiconductor memory device
JPS6275856A (en) * 1985-09-30 1987-04-07 Hitachi Ltd Nonvolatile memory device

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