JPS5622148A - Detecting system for program runaway - Google Patents
Detecting system for program runawayInfo
- 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
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
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)
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 |
-
1979
- 1979-07-31 JP JP9795679A patent/JPS5622148A/en active Pending
Cited By (2)
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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