JPS57161940A - Central processing device - Google Patents

Central processing device

Info

Publication number
JPS57161940A
JPS57161940A JP4635581A JP4635581A JPS57161940A JP S57161940 A JPS57161940 A JP S57161940A JP 4635581 A JP4635581 A JP 4635581A JP 4635581 A JP4635581 A JP 4635581A JP S57161940 A JPS57161940 A JP S57161940A
Authority
JP
Japan
Prior art keywords
output
branch
register
address
inputted
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
JP4635581A
Other languages
Japanese (ja)
Inventor
Shigemi Uemoto
Nobuyoshi Tate
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4635581A priority Critical patent/JPS57161940A/en
Publication of JPS57161940A publication Critical patent/JPS57161940A/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
    • G06F9/264—Microinstruction selection based on results of processing

Landscapes

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

Abstract

PURPOSE:To utilize effectively areas in a storage device, by providing a branch address part, a branch control part, and an operation control part in a microprogram instruction to use them as an address designating area or for the operation control. CONSTITUTION:An instruction address is stored into an address register 19 from a storage device 11, and one output of the register 19 is inputted to the storage device 11, and the other is inputted to a counter 182. Gates 20-22 are provided in the input side of the register 19 and are connected to the register 19 selectively. A branch controlling part 18 consists of a branch controlling circuit 181 and the counter 182, and the output of the branch controlling circuit 181 is conneted to gates 20-22 through transmission lines 15-17. The input is a branch condition signal and an output of a control bit 3B. The output of the counter 182 and the output of the branch controlling circuit 181 are connected to the gate 22. The output of an instruction control part 23 is inputted to the gate 20 to operate a microprogram.
JP4635581A 1981-03-31 1981-03-31 Central processing device Pending JPS57161940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4635581A JPS57161940A (en) 1981-03-31 1981-03-31 Central processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4635581A JPS57161940A (en) 1981-03-31 1981-03-31 Central processing device

Publications (1)

Publication Number Publication Date
JPS57161940A true JPS57161940A (en) 1982-10-05

Family

ID=12744836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4635581A Pending JPS57161940A (en) 1981-03-31 1981-03-31 Central processing device

Country Status (1)

Country Link
JP (1) JPS57161940A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0225931A (en) * 1988-07-14 1990-01-29 Hitachi Ltd Microprogram control system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4979142A (en) * 1972-12-01 1974-07-31
JPS5398752A (en) * 1977-02-10 1978-08-29 Hitachi Ltd Microprogram control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4979142A (en) * 1972-12-01 1974-07-31
JPS5398752A (en) * 1977-02-10 1978-08-29 Hitachi Ltd Microprogram control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0225931A (en) * 1988-07-14 1990-01-29 Hitachi Ltd Microprogram control system

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