JPS5794849A - Microprogram controller - Google Patents

Microprogram controller

Info

Publication number
JPS5794849A
JPS5794849A JP17159880A JP17159880A JPS5794849A JP S5794849 A JPS5794849 A JP S5794849A JP 17159880 A JP17159880 A JP 17159880A JP 17159880 A JP17159880 A JP 17159880A JP S5794849 A JPS5794849 A JP S5794849A
Authority
JP
Japan
Prior art keywords
register
address
routine
microinstruction
stored
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
JP17159880A
Other languages
Japanese (ja)
Inventor
Yasuyuki Iwata
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 JP17159880A priority Critical patent/JPS5794849A/en
Publication of JPS5794849A publication Critical patent/JPS5794849A/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

Abstract

PURPOSE:To reduce the whole number of steps, not by registering a subroutine as a subroutime of a specific main routine but by using a part of a general microprogram in common to a subroutine. CONSTITUTION:The process of the 1st routine progresses, and the address information sent from an address register 3 is selected through a switching circuit 5. Then a microinstruction of an address (m) is read out of a control storage 1 to be stored in a microinstruction register 2. At the same time, an added 6 address m+1 is stored in the register 3. At this step, a step number 22 of the register 2, i.e., a process step number -1 of a microinstruction that is to be used in common when the 1st routine uses a part of the 2nd routine as the 1st shared part is stored in a step number register 8. In addition, a branch address 21 of the register 2, i.e., an address (n) is selected at the circuit 5. Thus the microinstruction of the address (n) is read out of the storage 1 and stored in the register 2 to carry out the branching to the 2nd routine.
JP17159880A 1980-12-05 1980-12-05 Microprogram controller Pending JPS5794849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17159880A JPS5794849A (en) 1980-12-05 1980-12-05 Microprogram controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17159880A JPS5794849A (en) 1980-12-05 1980-12-05 Microprogram controller

Publications (1)

Publication Number Publication Date
JPS5794849A true JPS5794849A (en) 1982-06-12

Family

ID=15926127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17159880A Pending JPS5794849A (en) 1980-12-05 1980-12-05 Microprogram controller

Country Status (1)

Country Link
JP (1) JPS5794849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6279527A (en) * 1985-10-03 1987-04-11 Nec Corp Microprogram control device
JPH04191931A (en) * 1990-11-27 1992-07-10 Agency Of Ind Science & Technol Electronic computer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6279527A (en) * 1985-10-03 1987-04-11 Nec Corp Microprogram control device
JPH04191931A (en) * 1990-11-27 1992-07-10 Agency Of Ind Science & Technol Electronic computer

Similar Documents

Publication Publication Date Title
JPS5794849A (en) Microprogram controller
JPS55119747A (en) Microprogram control unit
JPS57103552A (en) Data processor
JPS5423343A (en) Microprogram controller
JPS5576448A (en) Multi-group register control system
JPS531432A (en) Information processing unit
JPS5365021A (en) Display unit
JPS5248365A (en) Electronic timepiece
JPS57125427A (en) Circuit for transmitting simultaneously command signal
JPS5591028A (en) Microprogram control system
JPS57193841A (en) Program counter circuit
JPS533033A (en) Code branching system for intelligent terminal unit
JPS5599652A (en) Microprogram control unit
JPS54109342A (en) Data processor
JPS5785148A (en) Instruction sequence control device
JPS55934A (en) Microprogram controller
JPS54139446A (en) Process mode control unit
JPS54149438A (en) Sequence control circuit
JPS56152059A (en) Program debugging system
JPS5532180A (en) Sequence controller capable of connecting plurality of external equipments
JPS553092A (en) Microprogram control unit
JPS54129846A (en) Emulator system
JPS51138140A (en) Line control memory access control system
JPS5440535A (en) Interface circuit for microcomputer
JPS5775355A (en) Control system of microprogram