JPS55146545A - Memory multiplexing system of microcomputer - Google Patents

Memory multiplexing system of microcomputer

Info

Publication number
JPS55146545A
JPS55146545A JP5417179A JP5417179A JPS55146545A JP S55146545 A JPS55146545 A JP S55146545A JP 5417179 A JP5417179 A JP 5417179A JP 5417179 A JP5417179 A JP 5417179A JP S55146545 A JPS55146545 A JP S55146545A
Authority
JP
Japan
Prior art keywords
memory
microcomputer
programs
same
multiplexing 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
JP5417179A
Other languages
Japanese (ja)
Inventor
Kiyoshi Chiba
Kazuya Yoshioka
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 JP5417179A priority Critical patent/JPS55146545A/en
Publication of JPS55146545A publication Critical patent/JPS55146545A/en
Pending legal-status Critical Current

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  • Microcomputers (AREA)

Abstract

PURPOSE: To obtain a memory multiplexing system of a microcomputer by which numbers of different processings can be executed, by automatically or manually selecting and using several ROMs having programs which begin with the same address.
CONSTITUTION: Memories 3W5 have programs whose execution start addresses are all the same and whose contents of processing are different. A microcomputer executes the same operation and generates different results depending upon the contents of the memory, even if any memory of the foregoing is connected. Now, in case an automatic interruption which selects the memory 3 is generated from the main computer 9, the microcomputer 1 gives a memory 3 connection command to a memory circuit 10, by which it is connected to the memory 3, and the operation is started. A manual interruption is carried out by depressing changeover switches 6W8 of an operator's console 2. In case a system is extended, it is attained by only adding a memory in which programs are written and a memory for connection.
COPYRIGHT: (C)1980,JPO&Japio
JP5417179A 1979-05-04 1979-05-04 Memory multiplexing system of microcomputer Pending JPS55146545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5417179A JPS55146545A (en) 1979-05-04 1979-05-04 Memory multiplexing system of microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5417179A JPS55146545A (en) 1979-05-04 1979-05-04 Memory multiplexing system of microcomputer

Publications (1)

Publication Number Publication Date
JPS55146545A true JPS55146545A (en) 1980-11-14

Family

ID=12963087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5417179A Pending JPS55146545A (en) 1979-05-04 1979-05-04 Memory multiplexing system of microcomputer

Country Status (1)

Country Link
JP (1) JPS55146545A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839343A (en) * 1981-08-31 1983-03-08 Nec Home Electronics Ltd Initial starting device for plural systems
JPS5839344A (en) * 1981-08-31 1983-03-08 Nec Home Electronics Ltd Initial starting device for plural systems
JPS60166050U (en) * 1984-04-11 1985-11-05 里　敏彰 Program-switchable memory circuit
JPS63314601A (en) * 1987-06-17 1988-12-22 Mitsubishi Electric Corp Interruption controller for computer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839343A (en) * 1981-08-31 1983-03-08 Nec Home Electronics Ltd Initial starting device for plural systems
JPS5839344A (en) * 1981-08-31 1983-03-08 Nec Home Electronics Ltd Initial starting device for plural systems
JPS60166050U (en) * 1984-04-11 1985-11-05 里　敏彰 Program-switchable memory circuit
JPS63314601A (en) * 1987-06-17 1988-12-22 Mitsubishi Electric Corp Interruption controller for computer

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