JPS564857A - Access system for memory unit - Google Patents
Access system for memory unitInfo
- Publication number
- JPS564857A JPS564857A JP7995679A JP7995679A JPS564857A JP S564857 A JPS564857 A JP S564857A JP 7995679 A JP7995679 A JP 7995679A JP 7995679 A JP7995679 A JP 7995679A JP S564857 A JPS564857 A JP S564857A
- Authority
- JP
- Japan
- Prior art keywords
- memory unit
- processor
- buffer memory
- requiring
- request command
- 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
Landscapes
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE: To reduce the access time without expelling useful information, by issuing the access request command with selection to the content of processing requiring the intervention of buffer memory unit and not requiring it according to the nature of the content by the processor.
CONSTITUTION: When the operating system 1, the accessing the file, judges the processing that it is the processing for file information used only once and for transfer of a lot of file information, the access request command not requiring the intrusion of the buffer memory unit 5 is issued to the processor 2. In the case of other processings, the access request command requesting the intervention of the buffer memory unit is issued from the processor. In the latter case, the control unit 4 transfers the data to be requested to the buffer memory unit to the processor immediately, and if not present, information transfer is made with the channel 3 of the processor after the transfer from the drive unit to the memory unit 5.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7995679A JPS564857A (en) | 1979-06-25 | 1979-06-25 | Access system for memory unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7995679A JPS564857A (en) | 1979-06-25 | 1979-06-25 | Access system for memory unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS564857A true JPS564857A (en) | 1981-01-19 |
Family
ID=13704751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7995679A Pending JPS564857A (en) | 1979-06-25 | 1979-06-25 | Access system for memory unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS564857A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829061A (en) * | 1981-08-17 | 1983-02-21 | Fujitsu Ltd | disk cache controller |
| JPS58161059A (en) * | 1981-11-27 | 1983-09-24 | ストレ−ジ・テクノロジ−・コ−ポレ−シヨン | Cash buffer memory subsystem |
| JPS58214946A (en) * | 1982-06-08 | 1983-12-14 | Nec Corp | Controlling system of microprogram |
| JPS5960552A (en) * | 1982-09-27 | 1984-04-06 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Peripheral data memory system |
| JPS60189552A (en) * | 1984-02-27 | 1985-09-27 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Buffer allotment controller |
| JPS60221823A (en) * | 1984-04-18 | 1985-11-06 | Fujitsu Ltd | Data accumulation controlling system |
| JPS6198468A (en) * | 1984-10-19 | 1986-05-16 | Hitachi Ltd | Data transfer system |
| JPH0268639A (en) * | 1988-09-02 | 1990-03-08 | Hitachi Ltd | Disk cache control system and information processing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51141538A (en) * | 1975-05-31 | 1976-12-06 | Toshiba Corp | Data processing device |
| JPS5384632A (en) * | 1976-12-30 | 1978-07-26 | Honeywell Inf Systems | Output*input cache system |
| JPS53126828A (en) * | 1977-04-13 | 1978-11-06 | Hitachi Ltd | Storage control unit |
-
1979
- 1979-06-25 JP JP7995679A patent/JPS564857A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51141538A (en) * | 1975-05-31 | 1976-12-06 | Toshiba Corp | Data processing device |
| JPS5384632A (en) * | 1976-12-30 | 1978-07-26 | Honeywell Inf Systems | Output*input cache system |
| JPS53126828A (en) * | 1977-04-13 | 1978-11-06 | Hitachi Ltd | Storage control unit |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829061A (en) * | 1981-08-17 | 1983-02-21 | Fujitsu Ltd | disk cache controller |
| JPH0323939B2 (en) * | 1981-08-17 | 1991-04-02 | Fujitsu Ltd | |
| JPS58161059A (en) * | 1981-11-27 | 1983-09-24 | ストレ−ジ・テクノロジ−・コ−ポレ−シヨン | Cash buffer memory subsystem |
| JPH0427580B2 (en) * | 1981-11-27 | 1992-05-12 | Storage Technology Corp | |
| JPS58214946A (en) * | 1982-06-08 | 1983-12-14 | Nec Corp | Controlling system of microprogram |
| JPS5960552A (en) * | 1982-09-27 | 1984-04-06 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Peripheral data memory system |
| JPS60189552A (en) * | 1984-02-27 | 1985-09-27 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Buffer allotment controller |
| JPH034940B2 (en) * | 1984-02-27 | 1991-01-24 | Intaanashonaru Bijinesu Mashiinzu Corp | |
| JPS60221823A (en) * | 1984-04-18 | 1985-11-06 | Fujitsu Ltd | Data accumulation controlling system |
| JPS6198468A (en) * | 1984-10-19 | 1986-05-16 | Hitachi Ltd | Data transfer system |
| JPH0436411B2 (en) * | 1984-10-19 | 1992-06-16 | Hitachi Ltd | |
| JPH0268639A (en) * | 1988-09-02 | 1990-03-08 | Hitachi Ltd | Disk cache control system and information processing system |
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