JPS5555490A - Memory control system - Google Patents

Memory control system

Info

Publication number
JPS5555490A
JPS5555490A JP12928078A JP12928078A JPS5555490A JP S5555490 A JPS5555490 A JP S5555490A JP 12928078 A JP12928078 A JP 12928078A JP 12928078 A JP12928078 A JP 12928078A JP S5555490 A JPS5555490 A JP S5555490A
Authority
JP
Japan
Prior art keywords
address
processor
bank
data
upper bits
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
JP12928078A
Other languages
Japanese (ja)
Inventor
Makoto Kubo
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 JP12928078A priority Critical patent/JPS5555490A/en
Publication of JPS5555490A publication Critical patent/JPS5555490A/en
Pending 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
    • G06F12/06Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0615Address space extension
    • G06F12/0623Address space extension for memory modules

Abstract

PURPOSE:To make it possible to extend an access area by designating simultaneously a data bank and program bank by specific bits of an address. CONSTITUTION:Corresponding one of data banks 4, 5... is selected through register 2 by an address, where upper bits are ''0'', from micro processor 1, and prescribed data is taken into processor 1. Meanwhile, program bank 3 is selected by upper bits of the address, and an instruction word corresponding to the address is taken into the processor to generate an address, where upper bits are ''1'', from the program counter of processor 1, and banks 4... are selected through register 2, but bank 3 is not selected. As a result, the access area can be extended over the address length to perform a mass data processing.
JP12928078A 1978-10-20 1978-10-20 Memory control system Pending JPS5555490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12928078A JPS5555490A (en) 1978-10-20 1978-10-20 Memory control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12928078A JPS5555490A (en) 1978-10-20 1978-10-20 Memory control system

Publications (1)

Publication Number Publication Date
JPS5555490A true JPS5555490A (en) 1980-04-23

Family

ID=15005670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12928078A Pending JPS5555490A (en) 1978-10-20 1978-10-20 Memory control system

Country Status (1)

Country Link
JP (1) JPS5555490A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843122U (en) * 1981-09-17 1983-03-23 日立建機株式会社 Work equipment control circuit
JPS58203560A (en) * 1982-05-24 1983-11-28 Toshiba Corp Processor of program
JPS59178561A (en) * 1983-03-30 1984-10-09 Fujitsu Ltd Bank controlling system
JPS6051957A (en) * 1983-08-31 1985-03-23 Toshiba Corp Microprocessor system
JPS61156344A (en) * 1984-12-27 1986-07-16 Sony Corp Memory device
JPH06284941A (en) * 1993-02-03 1994-10-11 Keiper Recaro Gmbh & Co Seat back for seat in vehicle particularly passenger car

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843122U (en) * 1981-09-17 1983-03-23 日立建機株式会社 Work equipment control circuit
JPS58203560A (en) * 1982-05-24 1983-11-28 Toshiba Corp Processor of program
JPS59178561A (en) * 1983-03-30 1984-10-09 Fujitsu Ltd Bank controlling system
JPS6051957A (en) * 1983-08-31 1985-03-23 Toshiba Corp Microprocessor system
JPH027097B2 (en) * 1983-08-31 1990-02-15 Tokyo Shibaura Electric Co
JPS61156344A (en) * 1984-12-27 1986-07-16 Sony Corp Memory device
JPH06284941A (en) * 1993-02-03 1994-10-11 Keiper Recaro Gmbh & Co Seat back for seat in vehicle particularly passenger car

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