JPS5730171A - Replacement control system of buffer memory - Google Patents

Replacement control system of buffer memory

Info

Publication number
JPS5730171A
JPS5730171A JP10343480A JP10343480A JPS5730171A JP S5730171 A JPS5730171 A JP S5730171A JP 10343480 A JP10343480 A JP 10343480A JP 10343480 A JP10343480 A JP 10343480A JP S5730171 A JPS5730171 A JP S5730171A
Authority
JP
Japan
Prior art keywords
memory
buffer memory
address
directory memory
control system
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
JP10343480A
Other languages
Japanese (ja)
Inventor
Satoshi Koga
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10343480A priority Critical patent/JPS5730171A/en
Publication of JPS5730171A publication Critical patent/JPS5730171A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/12—Replacement control

Abstract

PURPOSE:To realize algorithm on FIFO basis easily by updating continuously only one bit, added to each entry of a direct memory. CONSTITUTION:When an address in a directory memory does not coincide with the high-order digit part of a request address, a request is sent to a main storage and data is registered in a buffer memory 1 to register the address of the data in a directory memory 2. At this time, the registration positions of the buffer memory 1 and directory memory 2 are determined by a replacement circuit 3, and B pieces of bits read out from the directory memory 2 are compared with each pair of two contiguous bits to determine the registration position according to whether they coincide or not.
JP10343480A 1980-07-28 1980-07-28 Replacement control system of buffer memory Pending JPS5730171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10343480A JPS5730171A (en) 1980-07-28 1980-07-28 Replacement control system of buffer memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10343480A JPS5730171A (en) 1980-07-28 1980-07-28 Replacement control system of buffer memory

Publications (1)

Publication Number Publication Date
JPS5730171A true JPS5730171A (en) 1982-02-18

Family

ID=14353925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10343480A Pending JPS5730171A (en) 1980-07-28 1980-07-28 Replacement control system of buffer memory

Country Status (1)

Country Link
JP (1) JPS5730171A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178354A (en) * 1987-01-20 1988-07-22 Hitachi Ltd Replacement control system for buffer memory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178354A (en) * 1987-01-20 1988-07-22 Hitachi Ltd Replacement control system for buffer memory
JPH0548501B2 (en) * 1987-01-20 1993-07-21 Hitachi Ltd

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