JPS564857A - Access system for memory unit - Google Patents

Access system for memory unit

Info

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
Application number
JP7995679A
Other languages
Japanese (ja)
Inventor
Akira Kurano
Michio Miyazaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7995679A priority Critical patent/JPS564857A/en
Publication of JPS564857A publication Critical patent/JPS564857A/en
Pending legal-status Critical Current

Links

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  • 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
JP7995679A 1979-06-25 1979-06-25 Access system for memory unit Pending JPS564857A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829061A (en) * 1981-08-17 1983-02-21 Fujitsu Ltd Disc 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829061A (en) * 1981-08-17 1983-02-21 Fujitsu Ltd Disc 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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