JPS54105442A - Microprogram control system - Google Patents

Microprogram control system

Info

Publication number
JPS54105442A
JPS54105442A JP1212578A JP1212578A JPS54105442A JP S54105442 A JPS54105442 A JP S54105442A JP 1212578 A JP1212578 A JP 1212578A JP 1212578 A JP1212578 A JP 1212578A JP S54105442 A JPS54105442 A JP S54105442A
Authority
JP
Japan
Prior art keywords
register
instruction
microinstruction
memory unit
instruction code
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
JP1212578A
Other languages
Japanese (ja)
Inventor
Tomoyoshi Inasaka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1212578A priority Critical patent/JPS54105442A/en
Publication of JPS54105442A publication Critical patent/JPS54105442A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To shorten the execution time of an instruction, and also to reduce logic in amount without having a sequence control part such as an instruction code discrimination part, by directly supplying contents of an instruction register and arithmetic flag to a control memory unit.
CONSTITUTION: An instruction code is read out from the main memory unit and held by instruction register 1, and before being supplied to control memory unit 4 directly, and a microinstruction code to be executed first corresponding to the instruction code held by register 1 is outputted from unit 4 to microinstruction register 5 for the execution of the process, thereby finishing one step of the microinstruction. If the execution of the instruction code held by resister 1 requires several to tens steps, contents of register 1 are left as it is and microinstructions to be executed in sequence are prescribed by control counter 20 and arithmetic flag 22.
COPYRIGHT: (C)1979,JPO&Japio
JP1212578A 1978-02-06 1978-02-06 Microprogram control system Pending JPS54105442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1212578A JPS54105442A (en) 1978-02-06 1978-02-06 Microprogram control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1212578A JPS54105442A (en) 1978-02-06 1978-02-06 Microprogram control system

Publications (1)

Publication Number Publication Date
JPS54105442A true JPS54105442A (en) 1979-08-18

Family

ID=11796810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1212578A Pending JPS54105442A (en) 1978-02-06 1978-02-06 Microprogram control system

Country Status (1)

Country Link
JP (1) JPS54105442A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111949A (en) * 1980-02-08 1981-09-04 Toshiba Corp Arithmetic controller
JPS6089249A (en) * 1982-12-23 1985-05-20 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Microword generation mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56111949A (en) * 1980-02-08 1981-09-04 Toshiba Corp Arithmetic controller
JPS6089249A (en) * 1982-12-23 1985-05-20 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Microword generation mechanism
JPS6323585B2 (en) * 1982-12-23 1988-05-17 Intaanashonaru Bijinesu Mashiinzu Corp

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