JPS5385136A - Computer undefined instruction detector circuit - Google Patents

Computer undefined instruction detector circuit

Info

Publication number
JPS5385136A
JPS5385136A JP12577A JP12577A JPS5385136A JP S5385136 A JPS5385136 A JP S5385136A JP 12577 A JP12577 A JP 12577A JP 12577 A JP12577 A JP 12577A JP S5385136 A JPS5385136 A JP S5385136A
Authority
JP
Japan
Prior art keywords
computer
detector circuit
undefined instruction
instruction detector
undefined
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
JP12577A
Other languages
Japanese (ja)
Inventor
Hiroshi Watanabe
Takeshi Kato
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 JP12577A priority Critical patent/JPS5385136A/en
Publication of JPS5385136A publication Critical patent/JPS5385136A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make undefined instruction detection possible without changing hardware by only changing a microprogram at an instruction system change time in the computer undefined instruction detector circuit using the microprogram control system.
COPYRIGHT: (C)1978,JPO&Japio
JP12577A 1977-01-05 1977-01-05 Computer undefined instruction detector circuit Pending JPS5385136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12577A JPS5385136A (en) 1977-01-05 1977-01-05 Computer undefined instruction detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12577A JPS5385136A (en) 1977-01-05 1977-01-05 Computer undefined instruction detector circuit

Publications (1)

Publication Number Publication Date
JPS5385136A true JPS5385136A (en) 1978-07-27

Family

ID=11465305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12577A Pending JPS5385136A (en) 1977-01-05 1977-01-05 Computer undefined instruction detector circuit

Country Status (1)

Country Link
JP (1) JPS5385136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0195330A (en) * 1987-10-07 1989-04-13 Nec Corp System for detecting undefined instruction code

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0195330A (en) * 1987-10-07 1989-04-13 Nec Corp System for detecting undefined instruction code

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