JPS56114046A - Repetitive operation system - Google Patents

Repetitive operation system

Info

Publication number
JPS56114046A
JPS56114046A JP1685380A JP1685380A JPS56114046A JP S56114046 A JPS56114046 A JP S56114046A JP 1685380 A JP1685380 A JP 1685380A JP 1685380 A JP1685380 A JP 1685380A JP S56114046 A JPS56114046 A JP S56114046A
Authority
JP
Japan
Prior art keywords
stored
register
ctr
overflow
repetitive operation
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
JP1685380A
Other languages
Japanese (ja)
Inventor
Kazuhiko Goukon
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 JP1685380A priority Critical patent/JPS56114046A/en
Publication of JPS56114046A publication Critical patent/JPS56114046A/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

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 realize an repetitive operation system having a short operation time in an economical way for the central control unit that is controlled by the microprogram, by giving a control to the frequency of operation performing a repetition with an external counter circuit. CONSTITUTION:A control operation is given by the microprogram muPG to the product of the figure stored in the register BR and the 8-digit figure stored in the register Q, and such product is stored in the register R1. In this case, the figure 8 is supplied in the binary display to the 16-notation counter circuit CTR that controls a repetitive operation circuit from the terminals P0-P3. The figure stored in the register BR is stored in the register R1, and the instruction to shift the R1 to the right by a bit, if stored in the microinstruction CMIR, is decided by the decoder DEC and then advances the CTR by 1 along with the clock CL to store figure 9. A decision is given whether the CTR is overflow or not, and an operation is repeated until the CTR has an overflow. With an overflow, the signal OVF is delivered to proceed to the next step. Thus the instruction to subtract the figure by one with every repetitive operation can be excluded to reduce the operation time.
JP1685380A 1980-02-14 1980-02-14 Repetitive operation system Pending JPS56114046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1685380A JPS56114046A (en) 1980-02-14 1980-02-14 Repetitive operation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1685380A JPS56114046A (en) 1980-02-14 1980-02-14 Repetitive operation system

Publications (1)

Publication Number Publication Date
JPS56114046A true JPS56114046A (en) 1981-09-08

Family

ID=11927768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1685380A Pending JPS56114046A (en) 1980-02-14 1980-02-14 Repetitive operation system

Country Status (1)

Country Link
JP (1) JPS56114046A (en)

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