JPH02294815A - Connecting device for optical disk device - Google Patents

Connecting device for optical disk device

Info

Publication number
JPH02294815A
JPH02294815A JP11776089A JP11776089A JPH02294815A JP H02294815 A JPH02294815 A JP H02294815A JP 11776089 A JP11776089 A JP 11776089A JP 11776089 A JP11776089 A JP 11776089A JP H02294815 A JPH02294815 A JP H02294815A
Authority
JP
Japan
Prior art keywords
optical disk
disk device
data
local memory
dma
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
JP11776089A
Other languages
Japanese (ja)
Inventor
Yukio Yokogawa
横川　幸雄
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 Engineering Ltd
Original Assignee
NEC Engineering 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 NEC Engineering Ltd filed Critical NEC Engineering Ltd
Priority to JP11776089A priority Critical patent/JPH02294815A/en
Publication of JPH02294815A publication Critical patent/JPH02294815A/en
Pending legal-status Critical Current

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  • Bus Control (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To speed up data transfer processing to the main memory in a host device by providing G/A for DMA which transfers data directly to the main memory of the host device from an optical disk device. CONSTITUTION:The connecting device 7 for the optical disk device which is equipped with a local memory 3 and a processor 2 for data transfer from the optical disk device 9 to the local memory 3 is provided with the G/A1 for DMA which transfers data directly from the optical disk 9 to the main memory of the host device 8. Therefore, this device has a function for the DMA transfer of data from the optical disk device 9 to the local memory 3 in the connecting device and a function for the DMA transfer of data from the optical disk device 9 to the main memory of the host device 8 directly not through the local memory 3. Consequently, the fast data transfer is realized.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ディスク装置からホスト装置に対してデー
タ転送処理を行う光ディスク装置用接続装置に関し、特
にマルチプロセッサシステムにおける接続装置上のロー
カルメモリへのデータ転送処理と、ホスト装置内のメ．
インメモリへのデータ転送処理の高速化を行うことがで
きる光ディスク装置用接続装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a connecting device for an optical disk device that performs data transfer processing from an optical disk device to a host device, and in particular to a local memory on a connecting device in a multiprocessor system. data transfer processing and mail processing within the host device.
The present invention relates to a connection device for an optical disk device that can speed up data transfer processing to in-memory.

〔従来の技術〕[Conventional technology]

従来光ディスク装置用接続装置におけるデータ転送処理
は、第２図に示すように、プロセッサ（ＣＰＵ）１２を
有する接続装置１７のローカルメモリ（ＬＭ）１３上に
、光ディスク装置１つ専用のソフトウェアを設け、ホス
ト装置１８のユーザプログラムとのインタフェースを持
ち、光ディスク装置１つから接続装置１７内のローカル
メモリ１３にＳＣＳｉコントローラ１６を介してデータ
を内部バス１４を通してＤＭＡ転送し、この転送処理の
終了後、更にローカルメモリ１３上のデータをホスト装
置１８のホストバス２０を介してアプリケーションプロ
グラムによってユーザバッファにプログラムを転送して
いる。As shown in FIG. 2, data transfer processing in a conventional connection device for an optical disk device involves installing software dedicated to one optical disk device on the local memory (LM) 13 of a connection device 17 having a processor (CPU) 12. It has an interface with the user program of the host device 18, performs DMA transfer of data from one optical disk device to the local memory 13 in the connection device 17 via the SCSi controller 16 through the internal bus 14, and after the completion of this transfer process, Data on the local memory 13 is transferred to a user buffer by an application program via a host bus 20 of a host device 18.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述したような従来の光ディスク装置用接続装置のデー
タ転送方式は、ホスト装置内のアプリケーションバッフ
ァとローカルメモリとの間のプログラムの転送が必要と
なり、この分だけシステム性能が悪化するという欠点が
ある。The data transfer method of the conventional optical disk device connection device as described above has the disadvantage that it is necessary to transfer the program between the application buffer in the host device and the local memory, and system performance deteriorates by this amount.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の光ディスク装置用接続装置は、データ転送のと
き、光ディスク装置からはローカルメモリ上へのＤＭＡ
転送する機能と、ローカルメモリを管理するプロセッサ
を介さずに光ディスク装置から直接にホスト装置のアブ
リケーションバッファへデータをＤＭＡ転送する機能と
を有している。The optical disc device connection device of the present invention provides DMA transfer from the optical disc device to the local memory during data transfer.
It has a function of transferring data, and a function of directly transferring data from the optical disk device to the application buffer of the host device by DMA without going through a processor that manages local memory.

すなわち、本発明の光ディスク装置用接続装置は、ロー
カルメモリと、光ディスク装置から前記ローカルメモリ
にデータの転送を行うプロセッサとを備える光ディスク
装置用接続装置において、前記光ディスク装置からホス
ト装置のメインメモリに直接データの転送を行うＤＭＡ
専用Ｇ／Ａを備えている． 〔実施例〕 次に本発明の実施例について図面を参照して説明する。That is, the optical disk device connection device of the present invention includes a local memory and a processor that transfers data from the optical disk device to the local memory. DMA to transfer data
Equipped with a dedicated G/A. [Example] Next, an example of the present invention will be described with reference to the drawings.

第１図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.

第１図の実施例は、ＤＭＡ転送専用のＤＭＡ専用Ｇ／Ａ
１とＣＰＵ２の中にあるＤＭＡ機能との２種類のＤＭＡ
機能を備えており、ＣＰＵ２を使った場合は光ディスク
装置から光ディスク装置用接続装置７内のローカルメモ
リ（ＬＭ）３上へデータ転送を行ない、ホスト装置８の
ホストバス１０に直結したＤＭＡ専用Ｇ／Ａ１によって
光ディスク装置９からローカルメモリ３を介さぜホスト
装置８のメモリに直接データをＤＭＡ転送する。The embodiment shown in FIG. 1 is a DMA-dedicated G/A dedicated to DMA transfer.
There are two types of DMA: 1 and the DMA function in CPU2.
When the CPU 2 is used, data is transferred from the optical disk device to the local memory (LM) 3 in the optical disk device connection device 7, and the DMA dedicated G/ A1 directly transfers data from the optical disk device 9 to the memory of the host device 8 via the local memory 3 by DMA transfer.

本機能を使用することにより、光ディスク装置９の媒体
上からＯＳの制御用データを読む場合は、ＣＰＵ２によ
るデータ転送処理を用い、ローカルメモリ３上で制御用
データの解析を行なう。By using this function, when reading OS control data from the medium of the optical disk device 9, the control data is analyzed on the local memory 3 using data transfer processing by the CPU 2.

肱な、ユーザデータを読む場合は、ＤＭＡ専用Ｇ／Ａ１
によりデータ転送処理を用い、光ディスク装置９がホス
ト装置８内のユーザバッファにＤＭＡ転送を行なう。When reading user data, use the DMA dedicated G/A1.
Using data transfer processing, the optical disk device 9 performs DMA transfer to the user buffer in the host device 8.

この二つのデータ転送方式を操作することにより、光デ
ィスク装置９のデータのアクセス時間を向上させる。By operating these two data transfer methods, the data access time of the optical disk device 9 is improved.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の光ディスク装置用接続装
置は、光ディスク装置から接続装置内のローカルメモリ
上へデータをＤＭＡ転送する機能と、光ディスク装置か
らローカルメモリを経由せずに直接ホスト装置のメイン
メモリ上のアブリケーションバッファへデータをＤＭＡ
転送することができ、高速のデータ転送を実現すること
ができるという効果がある。As explained above, the optical disk device connection device of the present invention has a function of DMA transfer of data from the optical disk device to the local memory in the connection device, and a function of directly transferring data from the optical disk device to the main memory of the host device without going through the local memory. DMA data to application buffer in memory
This has the effect that high-speed data transfer can be realized.

続装置内ローカルメモリ（．ＬＭ）、１２・・・接続装
置内ローカルメモリ上のソフトウェアを制御するための
専用プロセッサ（ＣＰＵ）、１３・・・接続装置内ロー
カルメモリ（ＬＭ），Local memory in the connected device (.LM), 12... Dedicated processor (CPU) for controlling software on the local memory in the connected device, 13... Local memory in the connected device (LM),

Claims (1)

【特許請求の範囲】[Claims] ローカルメモリと、光ディスク装置から前記ローカルメ
モリにデータの転送を行うプロセッサとを備える光ディ
スク装置用接続装置において、前記光ディスク装置から
ホスト装置のメインメモリに直接データの転送を行うＤ
ＭＡ専用Ｇ／Ａを備えることを特徴とする光ディスク装
置用接続装置。In a connecting device for an optical disk device comprising a local memory and a processor that transfers data from the optical disk device to the local memory, D that directly transfers data from the optical disk device to the main memory of a host device.
A connection device for an optical disk device, characterized by comprising a MA-dedicated G/A.
JP11776089A 1989-05-10 1989-05-10 Connecting device for optical disk device Pending JPH02294815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11776089A JPH02294815A (en) 1989-05-10 1989-05-10 Connecting device for optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11776089A JPH02294815A (en) 1989-05-10 1989-05-10 Connecting device for optical disk device

Publications (1)

Publication Number Publication Date
JPH02294815A true JPH02294815A (en) 1990-12-05

Family

ID=14719647

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11776089A Pending JPH02294815A (en) 1989-05-10 1989-05-10 Connecting device for optical disk device

Country Status (1)

Country Link
JP (1) JPH02294815A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011186658A (en) * 2010-03-05 2011-09-22 Nec Corp Information processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011186658A (en) * 2010-03-05 2011-09-22 Nec Corp Information processor

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