JPS54102842A - Microprogram control system - Google Patents

Microprogram control system

Info

Publication number
JPS54102842A
JPS54102842A JP902578A JP902578A JPS54102842A JP S54102842 A JPS54102842 A JP S54102842A JP 902578 A JP902578 A JP 902578A JP 902578 A JP902578 A JP 902578A JP S54102842 A JPS54102842 A JP S54102842A
Authority
JP
Japan
Prior art keywords
arithmetic
assigned
contents
microinstruction
field
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.)
Granted
Application number
JP902578A
Other languages
Japanese (ja)
Other versions
JPS6051734B2 (en
Inventor
Takuji Okawa
Hiroshi Fujita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53009025A priority Critical patent/JPS6051734B2/en
Publication of JPS54102842A publication Critical patent/JPS54102842A/en
Publication of JPS6051734B2 publication Critical patent/JPS6051734B2/en
Expired legal-status Critical Current

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Abstract

PURPOSE: To quicken a process, and to reduce the capacity of a memory by providing a field for the assignment of arithmetic modification, and by making it possible to change atithmetic contents according to the internal state of a processor by a one-step microinstruction.
CONSTITUTION: In format (a) of a microinstruction, field FUNC1 to which arithmetic contents are assigned is composed of two bits, F1 and F0, and arithmetic contents shown in column FUNC are assigned (b). Next, field CTL2 for the assignment of arithmetic modification is composed on one bit and when "1" has been set, arithmetic contents assigned in FUNC1 are changed according to internal state CDC of the processor. Further, the microinstruction includes fields 3 and 4 indicating operand addresses.
COPYRIGHT: (C)1979,JPO&Japio
JP53009025A 1978-01-30 1978-01-30 Microprogram control method Expired JPS6051734B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53009025A JPS6051734B2 (en) 1978-01-30 1978-01-30 Microprogram control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53009025A JPS6051734B2 (en) 1978-01-30 1978-01-30 Microprogram control method

Publications (2)

Publication Number Publication Date
JPS54102842A true JPS54102842A (en) 1979-08-13
JPS6051734B2 JPS6051734B2 (en) 1985-11-15

Family

ID=11709106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53009025A Expired JPS6051734B2 (en) 1978-01-30 1978-01-30 Microprogram control method

Country Status (1)

Country Link
JP (1) JPS6051734B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200349A (en) * 1982-05-14 1983-11-21 Nec Corp Microprogram controller
JPS6014330A (en) * 1983-07-05 1985-01-24 Fuji Xerox Co Ltd Microprogram controller
JPS6160129A (en) * 1984-08-31 1986-03-27 Nec Corp Microprogram controller
JPS62285137A (en) * 1986-06-04 1987-12-11 Hitachi Ltd Digital signal processor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200349A (en) * 1982-05-14 1983-11-21 Nec Corp Microprogram controller
JPS6014330A (en) * 1983-07-05 1985-01-24 Fuji Xerox Co Ltd Microprogram controller
JPS6160129A (en) * 1984-08-31 1986-03-27 Nec Corp Microprogram controller
JPH03654B2 (en) * 1984-08-31 1991-01-08 Nippon Electric Co
JPS62285137A (en) * 1986-06-04 1987-12-11 Hitachi Ltd Digital signal processor

Also Published As

Publication number Publication date
JPS6051734B2 (en) 1985-11-15

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