JPS57130153A - Program control device - Google Patents

Program control device

Info

Publication number
JPS57130153A
JPS57130153A JP1527681A JP1527681A JPS57130153A JP S57130153 A JPS57130153 A JP S57130153A JP 1527681 A JP1527681 A JP 1527681A JP 1527681 A JP1527681 A JP 1527681A JP S57130153 A JPS57130153 A JP S57130153A
Authority
JP
Japan
Prior art keywords
instruction
control
register
address
effectiveness
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
JP1527681A
Other languages
Japanese (ja)
Inventor
Hitoshi Sato
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 JP1527681A priority Critical patent/JPS57130153A/en
Publication of JPS57130153A publication Critical patent/JPS57130153A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Detection And Correction Of Errors (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE:To prevent malfunctions of a program control device, by adding a code ensuring effectiveness to control information of the program control device. CONSTITUTION:When the initial value of a storage address register 12 is given to a control storage device 14, an instruction corresponding to the address is read out and is inputted to an instruction register 8. The effectiveness code in the instruction register 8 is sent to an effectiveness code detecting circuit 9 through a signal line (c), and it is confirmed that the instruction is effective as control information. Only when it is confirmed that the parity is correct and that the instruction is effective in a parity checking circuit 10 and the effectiveness code detecting circuit 9 respectively, the control corresponding to control information inputted to a decoder 11 is executed. Simultaneously, contents of the address field in the instruction register 8 are inputted to the storage address register 12, and the instruction stored in this address is next read out from the control storage device 14. Thus, the program control is executed sequentially.
JP1527681A 1981-02-04 1981-02-04 Program control device Pending JPS57130153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1527681A JPS57130153A (en) 1981-02-04 1981-02-04 Program control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1527681A JPS57130153A (en) 1981-02-04 1981-02-04 Program control device

Publications (1)

Publication Number Publication Date
JPS57130153A true JPS57130153A (en) 1982-08-12

Family

ID=11884331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1527681A Pending JPS57130153A (en) 1981-02-04 1981-02-04 Program control device

Country Status (1)

Country Link
JP (1) JPS57130153A (en)

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