JPS5719842A - Microprogram control device - Google Patents

Microprogram control device

Info

Publication number
JPS5719842A
JPS5719842A JP9343180A JP9343180A JPS5719842A JP S5719842 A JPS5719842 A JP S5719842A JP 9343180 A JP9343180 A JP 9343180A JP 9343180 A JP9343180 A JP 9343180A JP S5719842 A JPS5719842 A JP S5719842A
Authority
JP
Japan
Prior art keywords
microinstruction
register
word
branch
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
JP9343180A
Other languages
Japanese (ja)
Inventor
Toshiyuki Uda
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 JP9343180A priority Critical patent/JPS5719842A/en
Publication of JPS5719842A publication Critical patent/JPS5719842A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Advance Control (AREA)
  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE:To increase the number of degrees of freedom of a branch operation, to elevate the efficiency and to decrease a memory capacity, by adding a microinstruction auxiliary register, in a microprogram control device having a branch control function. CONSTITUTION:When a microinstruction word is read out from a control memory 1, it is stored also in a microinstruction auxiliary register 3 which has been provided separately from a microinstruction register 2 which has read it out, as necessary, and after that, contents of this microinstruction auxiliary register are used as a microinstruction (d) for controlling an operation control part 6, and a changeover instruction signal (e) is outputted. Therefore, when executing a loop, it is executed without reading over again the microinstruction word which has been already read out in the register 3. When pulling out a loop, the changeover intruction signal (e) is not outputted in order to execute one usual conditional branch of the microinstruction word, and a microinstruction of the register 2 is selected.
JP9343180A 1980-07-09 1980-07-09 Microprogram control device Pending JPS5719842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9343180A JPS5719842A (en) 1980-07-09 1980-07-09 Microprogram control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9343180A JPS5719842A (en) 1980-07-09 1980-07-09 Microprogram control device

Publications (1)

Publication Number Publication Date
JPS5719842A true JPS5719842A (en) 1982-02-02

Family

ID=14082113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9343180A Pending JPS5719842A (en) 1980-07-09 1980-07-09 Microprogram control device

Country Status (1)

Country Link
JP (1) JPS5719842A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61165135A (en) * 1984-12-24 1986-07-25 Fujitsu Ltd Loop processing system
JPH033037A (en) * 1989-05-31 1991-01-09 Nec Corp Microprogram control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61165135A (en) * 1984-12-24 1986-07-25 Fujitsu Ltd Loop processing system
JPH033037A (en) * 1989-05-31 1991-01-09 Nec Corp Microprogram control system

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