JPS56147245A - Microprogram control device - Google Patents

Microprogram control device

Info

Publication number
JPS56147245A
JPS56147245A JP5016280A JP5016280A JPS56147245A JP S56147245 A JPS56147245 A JP S56147245A JP 5016280 A JP5016280 A JP 5016280A JP 5016280 A JP5016280 A JP 5016280A JP S56147245 A JPS56147245 A JP S56147245A
Authority
JP
Japan
Prior art keywords
address
branch
supplied
gate
contents
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
JP5016280A
Other languages
Japanese (ja)
Inventor
Masahiro Kazuhara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5016280A priority Critical patent/JPS56147245A/en
Publication of JPS56147245A publication Critical patent/JPS56147245A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/22—Microcontrol or microprogram arrangements
    • G06F9/26—Address formation of the next micro-instruction ; Microprogram storage or retrieval arrangements
    • G06F9/261—Microinstruction address formation

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To extend the address tolerance of branch instructions considerably, by executing branch with the whole of contents of one micro word as the address. CONSTITUTION:When the branch instruction word used as a normal micro instruction is read from program memory 2 and is supplied to micro gate 3, it is supplied to address control gate 5, and further, address contents of address register 1 are selected from gate 5 and become the branch address. When the extension branch instruction word is read and is supplied to gate 3, decoded result branch signal bus 41 of decoder 4 is turned off, and extension branch bus 42 is turned on, and contents of signal bus 21 are selected and are supplied to address register 1 and become the extension branch address.
JP5016280A 1980-04-15 1980-04-15 Microprogram control device Pending JPS56147245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5016280A JPS56147245A (en) 1980-04-15 1980-04-15 Microprogram control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5016280A JPS56147245A (en) 1980-04-15 1980-04-15 Microprogram control device

Publications (1)

Publication Number Publication Date
JPS56147245A true JPS56147245A (en) 1981-11-16

Family

ID=12851494

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5016280A Pending JPS56147245A (en) 1980-04-15 1980-04-15 Microprogram control device

Country Status (1)

Country Link
JP (1) JPS56147245A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347581A (en) * 2005-06-15 2006-12-28 Shizuko Kobayashi Packaging body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006347581A (en) * 2005-06-15 2006-12-28 Shizuko Kobayashi Packaging body

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