JPS56153447A - Microprogram control device - Google Patents

Microprogram control device

Info

Publication number
JPS56153447A
JPS56153447A JP5742280A JP5742280A JPS56153447A JP S56153447 A JPS56153447 A JP S56153447A JP 5742280 A JP5742280 A JP 5742280A JP 5742280 A JP5742280 A JP 5742280A JP S56153447 A JPS56153447 A JP S56153447A
Authority
JP
Japan
Prior art keywords
instruction
skip
condition
circuit
read out
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
JP5742280A
Other languages
Japanese (ja)
Other versions
JPS6161411B2 (en
Inventor
Manabu Kimoto
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 JP5742280A priority Critical patent/JPS56153447A/en
Publication of JPS56153447A publication Critical patent/JPS56153447A/en
Publication of JPS6161411B2 publication Critical patent/JPS6161411B2/ja
Granted 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 prevent processing time from taking longer than required by inhibiting execution of a microinstruction when it is deviced to be the same kind as that of the previously processed instruction and assigning the address of the next instruction. CONSTITUTION:It is assumed that a skip instruction is read out to a command register 2. This sets the logic level of an instruction assignment line 7 at ''1''. Further, the part assigning skip conditions is supplied to a skip condition select circuit 8, and the condition signal assigned by this skip instruction is selected from various kinds of skip condition signals 9. The condition signal is combined with the signal of the skip instruction assignment line 7 by using an AND circuit 10, and is applied to a flip-flop 11. A control circuit 5 advances the content of a program counter 3 by 1 via a program counter control circuit 6 when the processing of the skip instruction is finished. In the next machine cycle, the 1st byte is read out to the instruction register 2.
JP5742280A 1980-04-30 1980-04-30 Microprogram control device Granted JPS56153447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5742280A JPS56153447A (en) 1980-04-30 1980-04-30 Microprogram control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5742280A JPS56153447A (en) 1980-04-30 1980-04-30 Microprogram control device

Publications (2)

Publication Number Publication Date
JPS56153447A true JPS56153447A (en) 1981-11-27
JPS6161411B2 JPS6161411B2 (en) 1986-12-25

Family

ID=13055208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5742280A Granted JPS56153447A (en) 1980-04-30 1980-04-30 Microprogram control device

Country Status (1)

Country Link
JP (1) JPS56153447A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455337A (en) * 1977-10-12 1979-05-02 Nec Corp Logical operation processing circuit
JPS54163641A (en) * 1978-06-15 1979-12-26 Matsushita Electric Ind Co Ltd Instruction execution system
JPS5541558A (en) * 1978-09-19 1980-03-24 Toshiba Corp Micro program control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5455337A (en) * 1977-10-12 1979-05-02 Nec Corp Logical operation processing circuit
JPS54163641A (en) * 1978-06-15 1979-12-26 Matsushita Electric Ind Co Ltd Instruction execution system
JPS5541558A (en) * 1978-09-19 1980-03-24 Toshiba Corp Micro program control system

Also Published As

Publication number Publication date
JPS6161411B2 (en) 1986-12-25

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