JPS5622148A - Detecting system for program runaway - Google Patents

Detecting system for program runaway

Info

Publication number
JPS5622148A
JPS5622148A JP9795679A JP9795679A JPS5622148A JP S5622148 A JPS5622148 A JP S5622148A JP 9795679 A JP9795679 A JP 9795679A JP 9795679 A JP9795679 A JP 9795679A JP S5622148 A JPS5622148 A JP S5622148A
Authority
JP
Japan
Prior art keywords
instruction
register
branch
key
permission
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
JP9795679A
Other languages
Japanese (ja)
Inventor
Tomonari Adachi
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 JP9795679A priority Critical patent/JPS5622148A/en
Publication of JPS5622148A publication Critical patent/JPS5622148A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To secure the detection of the fault for the program flow in a simple method, by providing the key showing the permission or the non-permission of execution into the instruction word and thus storing the features of the instruction when executing the instruction to examine the relation between the instruction's features and the keys.
CONSTITUTION: The instruction fetched by memory 1 is set to instruction register 2, and the OP code is decoded by decoder 3. And in case the instruction is a branch instruction, the contents of the key part is set to branch key register 5. When the branch conditions is satisfied, the branching destination instruction is fetched to be set to register 2. And the contents of the instruction key part is compared with that of register 5 through comparator 6. And when no coincidence is obtained through the comparison, the occurrence of the program runaway is decided by control circuit 7.
COPYRIGHT: (C)1981,JPO&Japio
JP9795679A 1979-07-31 1979-07-31 Detecting system for program runaway Pending JPS5622148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9795679A JPS5622148A (en) 1979-07-31 1979-07-31 Detecting system for program runaway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9795679A JPS5622148A (en) 1979-07-31 1979-07-31 Detecting system for program runaway

Publications (1)

Publication Number Publication Date
JPS5622148A true JPS5622148A (en) 1981-03-02

Family

ID=14206110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9795679A Pending JPS5622148A (en) 1979-07-31 1979-07-31 Detecting system for program runaway

Country Status (1)

Country Link
JP (1) JPS5622148A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783747A (en) * 1986-03-04 1988-11-08 Sanden Corporation Control device for an automatic vending machine
JPH05216721A (en) * 1992-02-06 1993-08-27 Nec Corp Electronic computer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783747A (en) * 1986-03-04 1988-11-08 Sanden Corporation Control device for an automatic vending machine
JPH05216721A (en) * 1992-02-06 1993-08-27 Nec Corp Electronic computer

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