JPS5714946A - Microprogram control device - Google Patents

Microprogram control device

Info

Publication number
JPS5714946A
JPS5714946A JP9015580A JP9015580A JPS5714946A JP S5714946 A JPS5714946 A JP S5714946A JP 9015580 A JP9015580 A JP 9015580A JP 9015580 A JP9015580 A JP 9015580A JP S5714946 A JPS5714946 A JP S5714946A
Authority
JP
Japan
Prior art keywords
memory
microinstruction
control
register
control device
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
JP9015580A
Other languages
Japanese (ja)
Inventor
Hiroyuki Wakita
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 JP9015580A priority Critical patent/JPS5714946A/en
Publication of JPS5714946A publication Critical patent/JPS5714946A/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
    • G06F9/262—Arrangements for next microinstruction selection
    • G06F9/268—Microinstruction selection not based on processing results, e.g. interrupt, patch, first cycle store, diagnostic programs

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 reduce the capacity of a control memory for a microprogram control device, by securing the replacement of microinstructions of different parts for those having similar contents of routine processes. CONSTITUTION:The 1st control memory 1 stores a microprogram, and the 2nd control memory 2 has a shorter word length and smaller number of words than the memory 1. The memory 2 is addressed by a part of the output of a microinstructions address register 6. A switching control circuit 5 controls a switching circuit 3 and then supplies the microinstruction read out of the memory 1 directly to a microinstruction register 4 or supplies a part of the microinstruction to the register 4 after replacing it with the contents read out of the memory 2.
JP9015580A 1980-07-01 1980-07-01 Microprogram control device Pending JPS5714946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9015580A JPS5714946A (en) 1980-07-01 1980-07-01 Microprogram control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9015580A JPS5714946A (en) 1980-07-01 1980-07-01 Microprogram control device

Publications (1)

Publication Number Publication Date
JPS5714946A true JPS5714946A (en) 1982-01-26

Family

ID=13990597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9015580A Pending JPS5714946A (en) 1980-07-01 1980-07-01 Microprogram control device

Country Status (1)

Country Link
JP (1) JPS5714946A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153025A2 (en) * 1984-02-21 1985-08-28 International Computers Limited Microprogram control
JPH07251179A (en) * 1994-03-15 1995-10-03 Nissei Giken Kk Reservoir-type water generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153025A2 (en) * 1984-02-21 1985-08-28 International Computers Limited Microprogram control
JPH07251179A (en) * 1994-03-15 1995-10-03 Nissei Giken Kk Reservoir-type water generator

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