JPS6390063A - Magnetic disk controller - Google Patents

Magnetic disk controller

Info

Publication number
JPS6390063A
JPS6390063A JP23561786A JP23561786A JPS6390063A JP S6390063 A JPS6390063 A JP S6390063A JP 23561786 A JP23561786 A JP 23561786A JP 23561786 A JP23561786 A JP 23561786A JP S6390063 A JPS6390063 A JP S6390063A
Authority
JP
Japan
Prior art keywords
data
magnetic disk
circuit
processing unit
time
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
JP23561786A
Other languages
Japanese (ja)
Inventor
Hiroshi Tomita
弘 富田
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
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 filed Critical NEC Corp
Priority to JP23561786A priority Critical patent/JPS6390063A/en
Publication of JPS6390063A publication Critical patent/JPS6390063A/en
Pending legal-status Critical Current

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  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To remove useless time by storing write data sent from a CPU in an EPROM at the time of hitting a power supply, and at the time of turning on the power supply, extracting the stored data and rewriting the data in a magnetic disk device. CONSTITUTION:At the time of hitting the power supply during the period of data writing operation, a magnetic disk processing circuit 110 stops the driving of a data carrying circuit 120 to interrupt the data writing operation and stores write data sent from a CPU in the EPROM 130 through a signal line 203. At the time of turning on the power supply again, the circuit 110 drives the circuit 120 through a line 204, extracts the write data stored in the EPROM 130 through the signal line 203 and writes the extracted data in the magnetic disk device through a signal line 201. Since it is unnecessary for the CPU to send a data rewriting instruction, useless time can be removed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、中央処理装置に接続され、該中央処理装置か
らの指示にしたがって動作し、磁気ディスク装置を制御
する磁気ディスク制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk control device that is connected to a central processing unit, operates according to instructions from the central processing unit, and controls a magnetic disk device.

〔従来の技術〕[Conventional technology]

従来、この種の磁気ディスク制御装置は、中央処理装置
から送出された書込みデータを磁気ディスク装置へ書込
み中に電源が瞬断した場合、磁気ディスク装置へのデー
タの書込みを中断していた。Conventionally, this type of magnetic disk control device has interrupted writing data to the magnetic disk device when the power is momentarily cut off while writing data sent from the central processing unit to the magnetic disk device.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来の磁気ディスク制御装置は、磁気ディスク
装置へのデータの書込み動作中に電源が瞬断した場合、
どこまでデータが磁気ディスク装置に書込まれているか
不明であることと、電源の再投入時に中央処理装置がデ
ータの再書込み指示を送出しなくてはいけないので、時
間的無駄を生じるという欠点がある。In the conventional magnetic disk control device described above, if the power is momentarily cut off while writing data to the magnetic disk device,
Disadvantages include the fact that it is unclear how much data has been written to the magnetic disk drive, and the central processing unit must send data rewrite instructions when the power is turned on again, resulting in wasted time. .

〔問題点を解決するための手段〕[Means for solving problems]

本発明の磁気ディスク制御装置は、 中央処理装置から送出された書込みデータを取込み、磁
気ディスク装置へ転送することで書込み動作を行うデー
タ転送回路と、 該書込みデータが格納されるＥＰＲＯＭと、前記データ
転送回路を駆動して磁気ディスク装置へのデータの書込
み動作を行なわせ、もし磁気ディスク装置へのデータの
書込み動作中に電源の瞬断を検出した場合、該データ転
送回路の駆動を停止して該磁気ディスク装置へのデータ
の出込み動作を中断させるとともに、前記ＥＰＲＯＭに
中央処理装置から送出された書込みデータを格納してお
き、電源の再投入時に該データ転送回路を駆動して該Ｅ
ＰＲＯＭに格納してある書込みデータを取出し、磁気デ
ィスク装置へのデータの再書込みを行わせる磁気ディス
ク処理回路とを有している。A magnetic disk control device of the present invention includes: a data transfer circuit that performs a write operation by taking in write data sent from a central processing unit and transferring it to a magnetic disk device; an EPROM in which the write data is stored; and an EPROM that stores the write data. The transfer circuit is driven to write data to the magnetic disk device, and if a momentary power interruption is detected during the data write operation to the magnetic disk device, the drive of the data transfer circuit is stopped. The data read/write operation to the magnetic disk device is interrupted, the write data sent from the central processing unit is stored in the EPROM, and when the power is turned on again, the data transfer circuit is driven to transfer the data to the EPROM.
It has a magnetic disk processing circuit that retrieves write data stored in the PROM and rewrites the data to the magnetic disk device.

このように、磁気ディスク装置へのデータの書込み動作
中に電源が瞬断した場合、書込みデータを格納しておき
、電源の再投入時に格納してあるデータを取出し磁気デ
ィスク装置へのデータの再書込みを行うことにより、中
央処理装置がデータの再書込み指示を送出する必要がな
いため時間的無駄を省くことができる。In this way, if the power is momentarily interrupted while data is being written to the magnetic disk drive, the written data can be stored, and when the power is turned back on, the stored data can be retrieved and the data can be rewritten to the magnetic disk drive. By writing, there is no need for the central processing unit to send out a data rewrite instruction, thereby saving time.

〔実施例〕〔Example〕

次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.

第１図は本発明の磁気ディスク制御装置の一実施例を示
すブロック図である。FIG. 1 is a block diagram showing an embodiment of a magnetic disk control device of the present invention.

本実施例の磁気ディスク制御装置１００は、磁気ディス
ク処理回路１１０と、データ転送回路１２０と、ＥＰＲ
ＯＭ　＋３０から構成されている。磁気ディスク処理回
路１１０は、中央処理装置から信号線２０２を通して磁
気ディスク装置へのデータの書込み指示を受取ると、信
号線２０４を通してデータ転送回路１２０を駆動し、中
央処理装置から信号線２００を通して取込んだ書込みデ
ータを信号線２０１を通して磁気ディスク装置に占込ま
せる。また、磁気ディスク処理回路１１０は、磁気ディ
スク装置へのデータの書込み動作中に電源の瞬断を検出
した場合、信号線２０４を通してデータ転送回路１２０
の駆動を停止にしてデータの書込み動作を中断させると
ともに、中央処理装置から送出された書込みデータを信
号線２０３を通してＥＰＲＯＭ　１３０に格納する。The magnetic disk control device 100 of this embodiment includes a magnetic disk processing circuit 110, a data transfer circuit 120, and an EPR.
It consists of OM +30. When the magnetic disk processing circuit 110 receives an instruction to write data to the magnetic disk device through the signal line 202 from the central processing unit, it drives the data transfer circuit 120 through the signal line 204 and receives data from the central processing unit through the signal line 200. The write data is written to the magnetic disk device through the signal line 201. Further, when the magnetic disk processing circuit 110 detects a momentary power interruption during data writing operation to the magnetic disk device, the magnetic disk processing circuit 110 transmits data to the data transfer circuit 120 through the signal line 204.
At the same time, the write data sent from the central processing unit is stored in the EPROM 130 through the signal line 203.

その後、磁気ディスク処理回路１１０は、電源の再投入
時に、信号線２０４を通してデータ転送回路１２０を駆
動して、ＥＰＲＯＭ　＋３０に格納されている磁気ディ
スク装置への書込み途中で中断された書込みデータを信
号線２０３を通して取出し、信号線２０１　を通して磁
気ディスク装舒に書込むことで、書込み動作中に電源が
瞬断した場合のデータの再書込みを行う。Thereafter, when the power is turned on again, the magnetic disk processing circuit 110 drives the data transfer circuit 120 through the signal line 204 to transfer the interrupted write data to the magnetic disk device stored in the EPROM +30 as a signal. By taking out the data through the line 203 and writing it into the magnetic disk device through the signal line 201, data can be rewritten even if the power is momentarily interrupted during a write operation.

〔発明の効果〕〔Effect of the invention〕

以ト説明したように本発明は、磁気ディスク装置へのデ
ータの書込み動作中に電源が瞬断した場合、書込みデー
タを格納しておき、電源の再投入時に格納してあるデー
タを取出し磁気ディスク装置へのデータの再書込みを行
うことにより、中央処理装置がデータの再書込み指示を
送出する必要がないため時間的無駄を省くことができる
という効果がある。As explained above, the present invention stores the written data when the power is momentarily cut off while writing data to the magnetic disk drive, and when the power is turned on again, retrieves the stored data and writes it back to the magnetic disk. By rewriting data to the device, there is no need for the central processing unit to send out a data rewriting instruction, which has the effect of saving time.

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

第１図は本発明の磁気ディスク制御装置の一実施例を示
すブロック図である。 １００・・・磁気ディスク制御装置、 １１０・・・磁気ディスク処理回路、 １２０・・・データ転送回路、 １３０・・・書込みデータ格納用ＥＰＲＯＭ。FIG. 1 is a block diagram showing an embodiment of a magnetic disk control device of the present invention. 100... Magnetic disk control device, 110... Magnetic disk processing circuit, 120... Data transfer circuit, 130... EPROM for storing write data.

Claims (1)

【特許請求の範囲】 中央処理装置に接続され、該中央処理装置からの指示に
従って動作し、磁気ディスク装置を制御する磁気ディス
ク制御装置であって、 中央処理装置から送出された書込みデータを取込み、磁
気ディスク装置へ転送することで書込み動作を行うデー
タ転送回路と、 該書込みデータが格納されるＥＰＲＯＭと、前記データ
転送回路を駆動して磁気ディスク装置へのデータの書込
み動作を行なわせ、もし磁気ディスク装置へのデータの
書込み動作中に電源の瞬断を検出した場合、該データ転
送回路の駆動を停止して該磁気ディスク装置へのデータ
の書込み動作を中断させるとともに、前記ＥＰＲＯＭに
中央処理装置から送出された書込みデータを格納してお
き、電源の再投入時に該データ転送回路を駆動して該Ｅ
ＰＲＯＭに格納してある書込みデータを取出し、磁気デ
ィスク装置へのデータの再書込を行わせる磁気ディスク
処理回路とを有する磁気ディスク制御装置。[Scope of Claims] A magnetic disk control device that is connected to a central processing unit, operates according to instructions from the central processing unit, and controls a magnetic disk device, the magnetic disk control device taking in write data sent from the central processing unit, A data transfer circuit that performs a write operation by transferring data to a magnetic disk device, an EPROM in which the written data is stored, and a data transfer circuit that drives the data transfer circuit to perform a write operation of data to the magnetic disk device. If a momentary power failure is detected during data writing to the disk drive, the drive of the data transfer circuit is stopped, the data writing to the magnetic disk drive is interrupted, and the central processing unit The write data sent from the E is stored, and the data transfer circuit is driven when the power is turned on again.
A magnetic disk control device that includes a magnetic disk processing circuit that retrieves write data stored in a PROM and rewrites the data to a magnetic disk device.
JP23561786A 1986-10-02 1986-10-02 Magnetic disk controller Pending JPS6390063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23561786A JPS6390063A (en) 1986-10-02 1986-10-02 Magnetic disk controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23561786A JPS6390063A (en) 1986-10-02 1986-10-02 Magnetic disk controller

Publications (1)

Publication Number Publication Date
JPS6390063A true JPS6390063A (en) 1988-04-20

Family

ID=16988661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23561786A Pending JPS6390063A (en) 1986-10-02 1986-10-02 Magnetic disk controller

Country Status (1)

Country Link
JP (1) JPS6390063A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356535A (en) * 1991-09-04 1994-10-18 Koyo Seiko Co., Ltd. Oil tank
US7174873B2 (en) 2004-10-27 2007-02-13 Toyota Jidosha Kabushiki Kaisha Welding structure for synthetic resin intake manifold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5356535A (en) * 1991-09-04 1994-10-18 Koyo Seiko Co., Ltd. Oil tank
US7174873B2 (en) 2004-10-27 2007-02-13 Toyota Jidosha Kabushiki Kaisha Welding structure for synthetic resin intake manifold

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