JPS6057841U - Write control circuit of magnetic disk device - Google Patents
Write control circuit of magnetic disk deviceInfo
- Publication number
- JPS6057841U JPS6057841U JP14704383U JP14704383U JPS6057841U JP S6057841 U JPS6057841 U JP S6057841U JP 14704383 U JP14704383 U JP 14704383U JP 14704383 U JP14704383 U JP 14704383U JP S6057841 U JPS6057841 U JP S6057841U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- disk device
- control circuit
- write control
- clock
- 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.)
- Granted
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は磁気ディスク装置及びディスクコントローラヲ
備えた従来のコンピュータシステムを示すブロック図、
第２図はディスク面への記録のフォーマットを示す図、
第３図は本考案の実施例を示すブロック図、第４図はク
ロック検出回路の具体回路図である。
主な図番の説明、１・・・・・・磁気ディスク装置、２
・・・・・・ディスクコントローラ、５・・・・・・ラ
イトアンプ回路、１１・・・・・・リード／ライト制御
回路、１２・・・ −・・・クロック選択回路、
１３・・・・・・カウンタ、１４・・・・・・ワードカ
ウンタ、１６・・・・・・クロック検出回路、１７、
１８． １９・・・・・・Ｊ−ＫＦＦ、２０，２１・・
・・・・ＡＮＤゲート。FIG. 1 is a block diagram showing a conventional computer system equipped with a magnetic disk device and a disk controller;
Figure 2 is a diagram showing the format of recording on the disc surface.
FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a specific circuit diagram of a clock detection circuit. Explanation of main drawing numbers, 1...Magnetic disk device, 2
... Disk controller, 5 ... Write amplifier circuit, 11 ... Read/write control circuit, 12 ... - ... Clock selection circuit,
13... Counter, 14... Word counter, 16... Clock detection circuit, 17.
18. 19...J-KFF, 20, 21...
...AND gate.
Claims (1)
て、前記磁気ディスク装置の制御を行なうディスクコン
トローラを備えて成るコンピュータシステムにおいて、
前記クロック信号が停止したことを検出し、検出信号を
発生するクロック検出回路を設け、該検出信号に応じて
前記磁気ディスク装置の書き込みを禁止するようにした
ことを特徴とする磁気ディスク装置の書き込み制御回路
。A computer system comprising a disk controller that controls the magnetic disk device based on a clock signal sent from the magnetic disk device,
Writing in a magnetic disk device, characterized in that a clock detection circuit is provided to detect that the clock signal has stopped and generate a detection signal, and to prohibit writing in the magnetic disk device in response to the detection signal. control circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14704383U JPS6057841U (en) | 1983-09-22 | 1983-09-22 | Write control circuit of magnetic disk device |
| US06/648,893 US4651277A (en) | 1983-09-16 | 1984-09-10 | Control system for a magnetic disk drive unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14704383U JPS6057841U (en) | 1983-09-22 | 1983-09-22 | Write control circuit of magnetic disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6057841U true JPS6057841U (en) | 1985-04-22 |
| JPH0129636Y2 JPH0129636Y2 (en) | 1989-09-08 |
Family
ID=30327112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14704383U Granted JPS6057841U (en) | 1983-09-16 | 1983-09-22 | Write control circuit of magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6057841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6180565A (en) * | 1984-09-26 | 1986-04-24 | Fujitsu Ltd | Magnetic disc device |
-
1983
- 1983-09-22 JP JP14704383U patent/JPS6057841U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6180565A (en) * | 1984-09-26 | 1986-04-24 | Fujitsu Ltd | Magnetic disc device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0129636Y2 (en) | 1989-09-08 |
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