JPS607698A - Method for checking bubble abnormality in magnetic bubble memory device - Google Patents

Method for checking bubble abnormality in magnetic bubble memory device

Info

Publication number
JPS607698A
JPS607698A JP58114170A JP11417083A JPS607698A JP S607698 A JPS607698 A JP S607698A JP 58114170 A JP58114170 A JP 58114170A JP 11417083 A JP11417083 A JP 11417083A JP S607698 A JPS607698 A JP S607698A
Authority
JP
Japan
Prior art keywords
bits
memory device
bubble
defective
magnetic bubble
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
JP58114170A
Other languages
Japanese (ja)
Inventor
「峰」村　敏光
Toshimitsu Minemura
Takenori Iida
飯田　武則
Katsunori Tanaka
克憲 田中
Shigeru Takai
高井　盛
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP58114170A priority Critical patent/JPS607698A/en
Publication of JPS607698A publication Critical patent/JPS607698A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To detect also a bubble abnormality generated in a defective loop by adding an ECC code also to the defective loop bit in a major/minor loop type magnetic bubble memory device. CONSTITUTION:The magnetic bubble memory device has the minor loops 3 (598 pieces) between a swap line 1 and a replicator 2. In the magnetic bubble memory device, 598 bits corresponding to the data of one page are constituted of read/ write data (effective data) of 512 bits, a defective loop of 60 bits, an ECC code of 12 bits and a gap of 14 bits. The objective bits of the ECC code are the effective data bits (512 bits) and the defective loop bits (60 bits). Thus, the bubble abnormality generated in the defective loop bits can be also detected.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、メジャー・マイナループ方式の磁気バブルメ
モリ装置におけるバブル異常チェック方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bubble abnormality check method in a major/minor loop type magnetic bubble memory device.

〔技術の背景〕[Technology background]

メジャー・マイナループ方式の磁気バブルメモリ装置に
は、マイナループ中に欠陥があるもの（不良ルーｆ）が
存在することが多く、１−２−ジ分のデータとしては不
良ループを除いた良好ループのみをデータビットとして
いる。このような磁気バブルメモリ装置においては、バ
ブル異常を検出するためにエラーチェックコード（ＥＣ
Ｃコード）を１ページ毎に付加している。ところで、従
来の磁気バブルメモリ装置においては、１−２−ジ毎の
有効データビットのみを対象としてＥＣＣコードが付加
されている。従って、有効ビットループに生じたバブル
異常は検知されるが、不良ループに生じたバブル異常は
検知されない。このことは、磁気バブルメモリ装置を実
用する際にＣま、問題にならないが、試験等に〉いて不
良ループを含めたマイナルーゾをチェックする場合に不
良ループにおけるバブル異常を検知することができない
ことになる。Magnetic bubble memory devices using the major/minor loop method often have a defective minor loop (defective loop f), and the data for 1-2-th is only good loops excluding the defective loops. It is called a data bit. In such a magnetic bubble memory device, an error check code (EC
C code) is added to each page. By the way, in a conventional magnetic bubble memory device, an ECC code is added only to the valid data bits of each 1-2-page. Therefore, bubble abnormalities occurring in valid bit loops are detected, but bubble abnormalities occurring in bad loops are not detected. This does not pose a problem when putting the magnetic bubble memory device into practical use, but when checking for minor defects including defective loops during testing, it becomes impossible to detect bubble abnormalities in defective loops. Become.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、メジャー・マイナループ方式の磁気バ
ブルメモリ装置において、不良ループに生じたバブル異
常も検出することができるバブル異常チェック方式を提
供することにある。An object of the present invention is to provide a bubble abnormality check method that can also detect bubble abnormalities occurring in defective loops in a major/minor loop type magnetic bubble memory device.

〔発明の構成〕[Structure of the invention]

前記の目的を達成するために、本発明においては、メジ
ャー・マイナルーデ方式の磁気バブルメモリ装置におい
て、１ページ毎に付加するエラーチェックコードのチェ
ック対象として有効データビットのみならず不良ループ
ビットも含めたことを特徴とする、磁気バブルメモリ装
置におけるバブル異常チェック方式が提供される。In order to achieve the above object, the present invention includes not only valid data bits but also defective loop bits as objects to be checked by an error check code added to each page in a major/minorude type magnetic bubble memory device. A bubble abnormality check method in a magnetic bubble memory device is provided.

〔発明の実施例〕[Embodiments of the invention]

本発明の一実施例“とじて磁気バブルメモリ装置ＶＣオ
けるバブル異常チェック方式が図面−を用いて以下に説
明される。DESCRIPTION OF THE PREFERRED EMBODIMENTS A bubble abnormality check method for a magnetic bubble memory device VC according to an embodiment of the present invention will be described below with reference to the drawings.

図面に示される磁気バブルメモリ装置は、スワップ線】
とリプリケータ２の間に５９８本のマイナループ３を有
している。この磁気バブルメモリ装置の１−２−ジ分の
データ５９８ビツトの構成は、読出し・書込みデータ（
すなわち有効データ）５１２ビツト（６４バイト）、不
良ループ６０ビツト、　ＥＣＣコード１２ビツト、ギャ
ップ１４ビツトである。本発明による磁気バブルメモリ
装置においては、ＦＣＣコードの対象となるビットは、
有効データビット（５］２ビツト）および不良ループビ
ット（６０ビツト）であり、これにより不良ループピッ
トに生じたバブル異常も検出することができる。The magnetic bubble memory device shown in the drawing has a swap line]
There are 598 minor loops 3 between the replicator 2 and the replicator 2. The configuration of 598 bits of data for 1-2 stages of this magnetic bubble memory device is read/write data (
That is, 512 bits (64 bytes) of valid data, 60 bits of defective loops, 12 bits of ECC code, and 14 bits of gap. In the magnetic bubble memory device according to the present invention, the bits subject to the FCC code are:
These are valid data bits (5) (2 bits) and defective loop bits (60 bits), and it is possible to detect bubble abnormalities occurring in defective loop pits.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、メジャー・マイナループ方式の磁気バ
ブルメモリ装置において、不良ループビットに生じたバ
ブル異常を検出することができるバブル異常チェック方
式が提供され得る。その結果より信頼度０塙い情報処理
が可能となる。According to the present invention, a bubble abnormality check method can be provided that can detect a bubble abnormality occurring in a defective loop bit in a major/minor loop type magnetic bubble memory device. As a result, information processing with zero reliability becomes possible.

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

図面は、本発明の一実施例としての磁気バブルメモリ装
置におけるバブル異常チェック方式を説明する図である
。 １・・・スワップ線、２・・・リプリケータ、３・・・
マイナループ。The drawing is a diagram illustrating a bubble abnormality check method in a magnetic bubble memory device as an embodiment of the present invention. 1...Swap line, 2...Replicator, 3...
Minor loop.

Claims (1)

【特許請求の範囲】[Claims] メジャー・マイナルーゾ方式の磁気／Ｓプルメモリ装同
において、１梨−ジ毎に付加するエラーチェックコード
のチェック対象として有効データビットのみならず不良
ループビットも含めたことを特徴とする、磁気バブルメ
モＩＪ装置におけるｉＲバブル常チェック方式。A magnetic bubble memo IJ device characterized by including not only valid data bits but also defective loop bits as a check target for an error check code added to each page in magnetic/S-pull memory mounting using a major/minor so method. iR bubble constant check method.
JP58114170A 1983-06-27 1983-06-27 Method for checking bubble abnormality in magnetic bubble memory device Pending JPS607698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58114170A JPS607698A (en) 1983-06-27 1983-06-27 Method for checking bubble abnormality in magnetic bubble memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58114170A JPS607698A (en) 1983-06-27 1983-06-27 Method for checking bubble abnormality in magnetic bubble memory device

Publications (1)

Publication Number Publication Date
JPS607698A true JPS607698A (en) 1985-01-16

Family

ID=14630921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58114170A Pending JPS607698A (en) 1983-06-27 1983-06-27 Method for checking bubble abnormality in magnetic bubble memory device

Country Status (1)

Country Link
JP (1) JPS607698A (en)

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