JPS5769343A - Paging system of microcomputer - Google Patents

Paging system of microcomputer

Info

Publication number
JPS5769343A
JPS5769343A JP14161780A JP14161780A JPS5769343A JP S5769343 A JPS5769343 A JP S5769343A JP 14161780 A JP14161780 A JP 14161780A JP 14161780 A JP14161780 A JP 14161780A JP S5769343 A JPS5769343 A JP S5769343A
Authority
JP
Japan
Prior art keywords
address
decoder
page
register
switching
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
JP14161780A
Other languages
Japanese (ja)
Inventor
Naruhiro Hayashi
Shufu Kusayanagi
Tsuneji Yano
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 JP14161780A priority Critical patent/JPS5769343A/en
Publication of JPS5769343A publication Critical patent/JPS5769343A/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
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0615—Address space extension
    • G06F12/0623—Address space extension for memory modules

Abstract

PURPOSE:To increase the designating range of the usable address and to access both a program and the working region with the same address designation scarcely changing the software, by adding a simple page switching device. CONSTITUTION:The hardware of the paging system of a microcomputer comprises a microprocessor, a common hard part 18, a gape switching part 19 and a ROM/ RAM hard register part 20 respectively. A gate switching register 11 is provided to the part 18, and a page decoder 12 provided at the part 19 is connected to the register 11. Furthermore an address decoder 14 is connected to the decoder 12 via a page enable line 13. At the same time, an address bus 16 is connected to the decoder 14, and the address is supplied to the part 20 via a page address line 15. Then the page designation code given from a decoder bus 17 is latched to the register 11, and the deisgnated data is decoded by the decoder 14. Thus the address designating range is increased.
JP14161780A 1980-10-09 1980-10-09 Paging system of microcomputer Pending JPS5769343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14161780A JPS5769343A (en) 1980-10-09 1980-10-09 Paging system of microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14161780A JPS5769343A (en) 1980-10-09 1980-10-09 Paging system of microcomputer

Publications (1)

Publication Number Publication Date
JPS5769343A true JPS5769343A (en) 1982-04-28

Family

ID=15296198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14161780A Pending JPS5769343A (en) 1980-10-09 1980-10-09 Paging system of microcomputer

Country Status (1)

Country Link
JP (1) JPS5769343A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6272036A (en) * 1985-09-26 1987-04-02 Hitachi Ltd Task control method for operating system
JPS62217326A (en) * 1986-03-18 1987-09-24 Nec Corp Computer capable of storing and switching plural os
JPS63107044U (en) * 1986-12-25 1988-07-11

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49122232A (en) * 1973-03-22 1974-11-22
JPS5384631A (en) * 1976-12-29 1978-07-26 Fujitsu Ltd Address assigning system of memory unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49122232A (en) * 1973-03-22 1974-11-22
JPS5384631A (en) * 1976-12-29 1978-07-26 Fujitsu Ltd Address assigning system of memory unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6272036A (en) * 1985-09-26 1987-04-02 Hitachi Ltd Task control method for operating system
JPS62217326A (en) * 1986-03-18 1987-09-24 Nec Corp Computer capable of storing and switching plural os
JPS63107044U (en) * 1986-12-25 1988-07-11
JPH0435956Y2 (en) * 1986-12-25 1992-08-25

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