JPS56153452A - Virtual computer system - Google Patents

Virtual computer system

Info

Publication number
JPS56153452A
JPS56153452A JP5721780A JP5721780A JPS56153452A JP S56153452 A JPS56153452 A JP S56153452A JP 5721780 A JP5721780 A JP 5721780A JP 5721780 A JP5721780 A JP 5721780A JP S56153452 A JPS56153452 A JP S56153452A
Authority
JP
Japan
Prior art keywords
address
bit
control register
main storage
storage
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.)
Granted
Application number
JP5721780A
Other languages
Japanese (ja)
Other versions
JPS6338729B2 (en
Inventor
Naoki Matsumura
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 JP5721780A priority Critical patent/JPS56153452A/en
Publication of JPS56153452A publication Critical patent/JPS56153452A/en
Publication of JPS6338729B2 publication Critical patent/JPS6338729B2/ja
Granted 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
    • G06F12/10—Address translation

Abstract

PURPOSE:To resolve overhead, by making the address conversion table, which is used to cause physical addresses on the main storage to coincide with addresses on the actual storage, into hardware partially. CONSTITUTION:Bit 0 of control register CR7 indicates whether the physical address of the main storage coincides with the address of the actual storage or not, and this bit 0 is ''1'' if they coincide with each other. In case of loading of address conversion table information, hardware for the aid of the virtual computer checks bit 0 of control register CR7 and sets address data on the main storage designated by the operand of the load control instruction of instruction register 1 to the control register if bit 0 of control register CR7 is ''1''. When the physical address on the main storage coincides with the address on the acutal storage, loading of address information is dependent upon hardware for the aid.
JP5721780A 1980-04-30 1980-04-30 Virtual computer system Granted JPS56153452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5721780A JPS56153452A (en) 1980-04-30 1980-04-30 Virtual computer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5721780A JPS56153452A (en) 1980-04-30 1980-04-30 Virtual computer system

Publications (2)

Publication Number Publication Date
JPS56153452A true JPS56153452A (en) 1981-11-27
JPS6338729B2 JPS6338729B2 (en) 1988-08-02

Family

ID=13049353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5721780A Granted JPS56153452A (en) 1980-04-30 1980-04-30 Virtual computer system

Country Status (1)

Country Link
JP (1) JPS56153452A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960652A (en) * 1982-09-30 1984-04-06 Fujitsu Ltd Data processing device
JPS59123943A (en) * 1982-12-29 1984-07-17 Fujitsu Ltd Vm assist control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142137A (en) * 1977-05-18 1978-12-11 Hitachi Ltd Memory control unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53142137A (en) * 1977-05-18 1978-12-11 Hitachi Ltd Memory control unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960652A (en) * 1982-09-30 1984-04-06 Fujitsu Ltd Data processing device
JPH0326414B2 (en) * 1982-09-30 1991-04-10 Fujitsu Ltd
JPS59123943A (en) * 1982-12-29 1984-07-17 Fujitsu Ltd Vm assist control system
JPH0447853B2 (en) * 1982-12-29 1992-08-05 Fujitsu Ltd

Also Published As

Publication number Publication date
JPS6338729B2 (en) 1988-08-02

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