JPS54129948A - Data processor - Google Patents
Data processorInfo
- Publication number
- JPS54129948A JPS54129948A JP3826178A JP3826178A JPS54129948A JP S54129948 A JPS54129948 A JP S54129948A JP 3826178 A JP3826178 A JP 3826178A JP 3826178 A JP3826178 A JP 3826178A JP S54129948 A JPS54129948 A JP S54129948A
- Authority
- JP
- Japan
- Prior art keywords
- word
- parity
- instruction
- signal
- read
- 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
Landscapes
- Detection And Correction Of Errors (AREA)
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To make it possible to prevent the execution of an improper instruction, by providing methods of discriminating, checking and detecting whether write or read information is an instruction word or data word.
CONSTITUTION: During a write from CPU1 to memory unit 2, signals of "0" for an instruction word and "1" for a data word are transmitted as the 1st control signals to parity-bit generating method 12 via the 1st sending method 11. In method 12, parity bits are added to the instruction word and data word by the 1st control signal with the both opposite in parity, and then stored in memory unit 2. At the time of a read from unit 2, parity-checking method 14 outputs to improper-word detecting method 15 a signal of "0" when the parity of the read word is odd and a signal of "1" when even. Method 15 detects an improper word by the signal from method 14, and the 2nd control singal from the 2nd sending method 13 indicating that the instruction word is "1" and the data word is "0", and if it is found, the read of words to CPU1 is stopped via gate control method 16.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3826178A JPS54129948A (en) | 1978-03-31 | 1978-03-31 | Data processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3826178A JPS54129948A (en) | 1978-03-31 | 1978-03-31 | Data processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54129948A true JPS54129948A (en) | 1979-10-08 |
Family
ID=12520368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3826178A Pending JPS54129948A (en) | 1978-03-31 | 1978-03-31 | Data processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54129948A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0371236A (en) * | 1989-08-10 | 1991-03-27 | Nippondenso Co Ltd | Error detecting system |
JPH0962525A (en) * | 1995-08-30 | 1997-03-07 | Nec Ic Microcomput Syst Ltd | Device and method for detecting program runaway |
-
1978
- 1978-03-31 JP JP3826178A patent/JPS54129948A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0371236A (en) * | 1989-08-10 | 1991-03-27 | Nippondenso Co Ltd | Error detecting system |
JPH0962525A (en) * | 1995-08-30 | 1997-03-07 | Nec Ic Microcomput Syst Ltd | Device and method for detecting program runaway |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55105900A (en) | Error correction/detection system | |
JPS5539994A (en) | Multiprocessor system | |
JPS55127652A (en) | Mutual supervision system between computers | |
JPS54129948A (en) | Data processor | |
JPS55157042A (en) | Information processor | |
JPS6412348A (en) | Buffer control system | |
JPS5259537A (en) | Data processor | |
JPS57169857A (en) | Control storage device | |
JPS5495144A (en) | Malfunction detection system in data processing unit | |
JPS5617442A (en) | Parity error processing system | |
JPS5452936A (en) | Memroy processor | |
JPS5593596A (en) | Memory unit | |
JPS5663652A (en) | Information processing unit | |
JPS5693196A (en) | Error detecting system of checking circuit | |
JPS5595152A (en) | Microinstruction execution control system | |
JPS554757A (en) | Error control system of memory unit | |
JPS57146349A (en) | Discriminating method of performance of check circuit | |
JPS543444A (en) | Error detection system | |
JPS5552598A (en) | Data processor | |
JPS5621251A (en) | Retrial control system | |
JPS55142479A (en) | Failure processing system for magnetic bubble memory | |
JPS5537625A (en) | Data storing read system | |
JPS5621235A (en) | Microprogram control system | |
JPS57164351A (en) | Debugging device | |
JPS55115148A (en) | Error detection and correction system |