JPS6267355U - - Google Patents
Info
- Publication number
- JPS6267355U JPS6267355U JP15947985U JP15947985U JPS6267355U JP S6267355 U JPS6267355 U JP S6267355U JP 15947985 U JP15947985 U JP 15947985U JP 15947985 U JP15947985 U JP 15947985U JP S6267355 U JPS6267355 U JP S6267355U
- Authority
- JP
- Japan
- Prior art keywords
- data
- storage device
- external storage
- compresses
- control circuit
- 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
Links
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013144 data compression Methods 0.000 description 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図は、本考案の一実施例を示す外部記憶装
置のデータ制御回路を含むシステムブロツク図、
第２図は１６ビツトのデータ圧縮の一実施例を示
すフローチヤート、第３図は第２図の結果を説明
する図である。
１：ホストＣＰＵ、２：磁気デイスク制御装置
、３：磁気デイスク装置、２０：磁気デイスク制
御回路、２１：データ制御回路、２２：データ変
換プロセツサ、２３：ローカルメモリ。
FIG. 1 is a system block diagram including a data control circuit of an external storage device showing one embodiment of the present invention;
FIG. 2 is a flowchart showing an example of 16-bit data compression, and FIG. 3 is a diagram explaining the results of FIG. 1: host CPU, 2: magnetic disk control device, 3: magnetic disk device, 20: magnetic disk control circuit, 21: data control circuit, 22: data conversion processor, 23: local memory.
Claims (1)
制御する制御回路において、転送されたデータを
圧縮・伸縮するデータ変換プロセツサと圧縮され
たデータを一時格納するローカルメモリとを備え
、前記外部記憶装置のシーク・回転動作時に書込
みデータを圧縮して書込みの準備をし、シーク終
了と同時に書込を開始することを特徴とする外部
記憶装置のデータ制御回路。 A control circuit that controls the external storage device in response to instructions from a host device includes a data conversion processor that compresses and expands/compresses the transferred data, and a local memory that temporarily stores the compressed data, and the external storage device 1. A data control circuit for an external storage device, which compresses write data to prepare for writing during a seek/rotation operation, and starts writing at the same time as the seek ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15947985U JPS6267355U (en) | 1985-10-18 | 1985-10-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15947985U JPS6267355U (en) | 1985-10-18 | 1985-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6267355U true JPS6267355U (en) | 1987-04-27 |
Family
ID=31083952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15947985U Pending JPS6267355U (en) | 1985-10-18 | 1985-10-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6267355U (en) |
-
1985
- 1985-10-18 JP JP15947985U patent/JPS6267355U/ja active Pending
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