JPS56162147A - Microcomputer - Google Patents

Microcomputer

Info

Publication number
JPS56162147A
JPS56162147A JP5229580A JP5229580A JPS56162147A JP S56162147 A JPS56162147 A JP S56162147A JP 5229580 A JP5229580 A JP 5229580A JP 5229580 A JP5229580 A JP 5229580A JP S56162147 A JPS56162147 A JP S56162147A
Authority
JP
Japan
Prior art keywords
memory
cpu
memories
switches
cpu1
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
JP5229580A
Other languages
Japanese (ja)
Inventor
Yoshiro Kito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5229580A priority Critical patent/JPS56162147A/en
Publication of JPS56162147A publication Critical patent/JPS56162147A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To increase the number of functions without changing software, by using a switching means to connect plural memories to a CPU in an alternative way and by initializing the CPU at the connection switching time. CONSTITUTION:N-sets of memory 2-1-2-N and a common I/O 3 are connected to a CPU1, and two series of rotary switches 4A and 4B operated manually are provided. Different programs are stored in memories 2-1-2-N. When switches 4A and 4B are connected to contacts 4A-N and 4B-N corresponding to the memory 2-N, only the memory 2-N is enable, and other memories are disable. When switches 4A and 4B are switched to contacts 4A-1 and 4B-1, a voltage of +5V is applied to a restart circuit 5 by the switch 4B, and the circuit 5 supplies the H level to the CPU 1 for about 50msec to reset and initialize the CPU1, and the memory 2-1 is made enable.
JP5229580A 1980-04-22 1980-04-22 Microcomputer Pending JPS56162147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5229580A JPS56162147A (en) 1980-04-22 1980-04-22 Microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5229580A JPS56162147A (en) 1980-04-22 1980-04-22 Microcomputer

Publications (1)

Publication Number Publication Date
JPS56162147A true JPS56162147A (en) 1981-12-12

Family

ID=12910801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5229580A Pending JPS56162147A (en) 1980-04-22 1980-04-22 Microcomputer

Country Status (1)

Country Link
JP (1) JPS56162147A (en)

Cited By (2)

* 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
JPS6024798A (en) * 1983-07-20 1985-02-07 Matsushita Electric Ind Co Ltd Remote controller

Cited By (3)

* 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
JPS6024798A (en) * 1983-07-20 1985-02-07 Matsushita Electric Ind Co Ltd Remote controller
JPH0126238B2 (en) * 1983-07-20 1989-05-23 Matsushita Electric Ind Co Ltd

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