GB1429850A - Data processing systems - Google Patents

Data processing systems

Info

Publication number
GB1429850A
GB1429850A GB2863073A GB2863073A GB1429850A GB 1429850 A GB1429850 A GB 1429850A GB 2863073 A GB2863073 A GB 2863073A GB 2863073 A GB2863073 A GB 2863073A GB 1429850 A GB1429850 A GB 1429850A
Authority
GB
United Kingdom
Prior art keywords
store
address
virtual
comparator
register
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.)
Expired
Application number
GB2863073A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1429850A publication Critical patent/GB1429850A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02Addressing or allocation; Relocation
    • G06F12/08Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/10Address translation
    • G06F12/1027Address translation using associative or pseudo-associative address translation means, e.g. translation look-aside buffer [TLB]

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Memory System (AREA)

Abstract

1429850 Virtual addressing INTERNATIONAL BUSINESS MACHINES CORP 15 June 1973 [21 July 1972] 28630/73 Heading G4A Virtual addresses provided by a processor 1 (Fig. 1) for accessing a main store 6 are compared in comparator 2 with data representing the boundary in main store defining an area dedicated to storing selected programme information, e.g. the supervisor, within which virtual to real translation is not necessary, the virtual address being used to address the store when it falls within that area. As described, virtual addresses from register 4 are fed if comparison occurs via AND gate 13 to register 14 to address the store. Each virtual address is also fed to associative store 3 to cause read out of the corresponding real address, if it is stored therein, via gate 15 (inhibited when comparator 2 gives an output on lead 10) to the address register 14. If neither the comparator 2 nor the associative store 3 gives a match signal, gate 16 signals processor 1 to feed the virtual address to access segment and page tables stored in the main store and if found the real and virtual addresses are then placed in the associative store under the control of a least recently used logic circuit 20. If the page is not in the main store it is brought from, for example, disc storage and written in the main store in place of a selected page.
GB2863073A 1972-07-21 1973-06-15 Data processing systems Expired GB1429850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27404072A 1972-07-21 1972-07-21

Publications (1)

Publication Number Publication Date
GB1429850A true GB1429850A (en) 1976-03-31

Family

ID=23046519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2863073A Expired GB1429850A (en) 1972-07-21 1973-06-15 Data processing systems

Country Status (19)

Country Link
JP (1) JPS5444175B2 (en)
AR (1) AR204699A1 (en)
AU (1) AU472173B2 (en)
BG (1) BG28079A3 (en)
BR (1) BR7305500D0 (en)
CA (1) CA985789A (en)
CH (1) CH550437A (en)
DD (1) DD106911A5 (en)
DE (1) DE2331394B1 (en)
ES (1) ES416400A1 (en)
FR (1) FR2194328A5 (en)
GB (1) GB1429850A (en)
HU (1) HU170278B (en)
IT (1) IT1003084B (en)
NL (1) NL7309695A (en)
PL (1) PL100121B1 (en)
RO (1) RO72464A (en)
SU (1) SU784814A3 (en)
YU (1) YU35688B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171648A (en) * 1974-12-18 1976-06-21 Panafacom Ltd
JPS5275931A (en) * 1975-12-22 1977-06-25 Oki Electric Ind Co Ltd Memory address extension mechanism for information processing unit
JPS5821305B2 (en) * 1976-05-31 1983-04-28 横河電機株式会社 calculator
JPS5821307B2 (en) * 1976-09-14 1983-04-28 横河電機株式会社 Data processing device with address conversion function
JPS5821306B2 (en) * 1976-09-14 1983-04-28 横河電機株式会社 Data processing device with address conversion function
JPS5435638A (en) * 1977-08-25 1979-03-15 Toshiba Corp Address converter
JPS5435637A (en) * 1977-08-25 1979-03-15 Toshiba Corp Address conversion system
DE2842288A1 (en) * 1978-09-28 1980-04-17 Siemens Ag DATA TRANSFER SWITCH WITH ASSOCIATIVE ADDRESS SELECTION IN A VIRTUAL MEMORY

Also Published As

Publication number Publication date
AU5730773A (en) 1975-01-09
ES416400A1 (en) 1976-02-16
JPS5444175B2 (en) 1979-12-24
NL7309695A (en) 1974-01-23
CH550437A (en) 1974-06-14
YU177573A (en) 1980-10-31
DD106911A5 (en) 1974-07-05
HU170278B (en) 1977-05-28
IT1003084B (en) 1976-06-10
CA985789A (en) 1976-03-16
AR204699A1 (en) 1976-02-27
SU784814A3 (en) 1980-11-30
FR2194328A5 (en) 1974-02-22
DE2331394B1 (en) 1974-01-10
YU35688B (en) 1981-04-30
JPS4953338A (en) 1974-05-23
DE2331394A1 (en) 1974-01-10
BG28079A3 (en) 1980-02-25
AU472173B2 (en) 1976-05-20
BR7305500D0 (en) 1974-08-22
RO72464A (en) 1981-06-26
PL100121B1 (en) 1978-09-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee