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JPS5495144A - Malfunction detection system in data processing unit - Google Patents

Malfunction detection system in data processing unit

Info

Publication number
JPS5495144A
JPS5495144A JP203578A JP203578A JPS5495144A JP S5495144 A JPS5495144 A JP S5495144A JP 203578 A JP203578 A JP 203578A JP 203578 A JP203578 A JP 203578A JP S5495144 A JPS5495144 A JP S5495144A
Authority
JP
Japan
Prior art keywords
data
instruction code
unit
processing unit
data processing
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
JP203578A
Other languages
Japanese (ja)
Inventor
Akiji Hasegawa
Kunio Suzuki
Yoshiaki Takahashi
Kazuhiko Kobayashi
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 JP203578A priority Critical patent/JPS5495144A/en
Publication of JPS5495144A publication Critical patent/JPS5495144A/en
Pending legal-status Critical Current

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  • Detection And Correction Of Errors (AREA)

Abstract

PURPOSE: To improve reliability by providing a redundant bit in stored data and instruction code and detecting as malfunction when data code is read out at an instruction code read time.
CONSTITUTION: In the data processing unit equipped with operation processing unit 1 and memory unit 18 which stores data and instruction code, discriminating redundant bit 22 which discriminates whether memory contents are instruction code or data is provided in memory register 20 of unit 18 in word unit, and a constitution where information is sent to data bus 16 as well as provided discrimination signal line 23 by the read of memory contents is given. Then, unit 1 discriminates information of signal line 23; and when data is read out at an instruction code read time, FF 25 is operated to output malfunction detection signal 26.
COPYRIGHT: (C)1979,JPO&Japio
JP203578A 1978-01-13 1978-01-13 Malfunction detection system in data processing unit Pending JPS5495144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP203578A JPS5495144A (en) 1978-01-13 1978-01-13 Malfunction detection system in data processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP203578A JPS5495144A (en) 1978-01-13 1978-01-13 Malfunction detection system in data processing unit

Publications (1)

Publication Number Publication Date
JPS5495144A true JPS5495144A (en) 1979-07-27

Family

ID=11518065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP203578A Pending JPS5495144A (en) 1978-01-13 1978-01-13 Malfunction detection system in data processing unit

Country Status (1)

Country Link
JP (1) JPS5495144A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121152A (en) * 1980-02-27 1981-09-22 Hitachi Ltd Monitor system of computer program
JPS57211646A (en) * 1981-06-22 1982-12-25 Fujitsu Ltd Subroutine controlling system
JPS58103049A (en) * 1981-12-15 1983-06-18 Fujitsu Ltd Runaway monitoring method
US8645643B2 (en) 2007-04-18 2014-02-04 Freescale Semiconductor, Inc. Data processing control unit for controlling multiple data processing operations

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121152A (en) * 1980-02-27 1981-09-22 Hitachi Ltd Monitor system of computer program
JPS57211646A (en) * 1981-06-22 1982-12-25 Fujitsu Ltd Subroutine controlling system
JPS6148738B2 (en) * 1981-06-22 1986-10-25 Fujitsu Ltd
JPS58103049A (en) * 1981-12-15 1983-06-18 Fujitsu Ltd Runaway monitoring method
US8645643B2 (en) 2007-04-18 2014-02-04 Freescale Semiconductor, Inc. Data processing control unit for controlling multiple data processing operations

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