JPS5657154A - Fault detection system - Google Patents

Fault detection system

Info

Publication number
JPS5657154A
JPS5657154A JP13312379A JP13312379A JPS5657154A JP S5657154 A JPS5657154 A JP S5657154A JP 13312379 A JP13312379 A JP 13312379A JP 13312379 A JP13312379 A JP 13312379A JP S5657154 A JPS5657154 A JP S5657154A
Authority
JP
Japan
Prior art keywords
register
word
identification number
microprogram
cycle
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
JP13312379A
Other languages
Japanese (ja)
Inventor
Itaru Ishikawa
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 JP13312379A priority Critical patent/JPS5657154A/en
Publication of JPS5657154A publication Critical patent/JPS5657154A/en
Pending legal-status Critical Current

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  • Debugging And Monitoring (AREA)

Abstract

PURPOSE: To inspect the sequence of the microprogram in every machine cycle, by providing a word idetification number giving algorithm as a word identification number generating circuit with hardware, in the fault detection system of the microprogram control device.
CONSTITUTION: In the first cycle, micro instruction inversion B other than the barnch instruction is stored to register 30 from control memory 10 through register 20. New word identification number a+1 generated by word identification number generating circuit A1 is selected on a basis of identification number (a) of register 30. In the second cycle, branch instruction B is read from memory 10 and is stored in register 20. Consequently, number a+1 of selection result E2a and number (b) of word number 20a are compared with each other in comparing circuit C1. As the result, a signal indicating "0" of the normal state is sent to the fault processing control part. In the following cycles, the same operations are performed also. As a result, the microprogram can be inspected in every machine cycle.
COPYRIGHT: (C)1981,JPO&Japio
JP13312379A 1979-10-16 1979-10-16 Fault detection system Pending JPS5657154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13312379A JPS5657154A (en) 1979-10-16 1979-10-16 Fault detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13312379A JPS5657154A (en) 1979-10-16 1979-10-16 Fault detection system

Publications (1)

Publication Number Publication Date
JPS5657154A true JPS5657154A (en) 1981-05-19

Family

ID=15097320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13312379A Pending JPS5657154A (en) 1979-10-16 1979-10-16 Fault detection system

Country Status (1)

Country Link
JP (1) JPS5657154A (en)

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