JPS55139699A - Error detection system of memory unit - Google Patents
Error detection system of memory unitInfo
- Publication number
- JPS55139699A JPS55139699A JP4765279A JP4765279A JPS55139699A JP S55139699 A JPS55139699 A JP S55139699A JP 4765279 A JP4765279 A JP 4765279A JP 4765279 A JP4765279 A JP 4765279A JP S55139699 A JPS55139699 A JP S55139699A
- Authority
- JP
- Japan
- Prior art keywords
- information
- pieces
- coincidence
- detection system
- units
- 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
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To make it possible to detect even an error of an even-numbered bit by a parity check, by checking coincidence between input information and output information through exclusive OR.
CONSTITUTION: Pieces of input information A1... written in logic memory units 1... and pieces of output information B1... read from units 1 are exclusively OR-ed to generate pieces of ineffective coincidence information C1... between pieces of input and output information from exclusive OR units 2... Then, they are applied to AND gate 4 opening by a needed timing signal by way of OR circuit 3 to generate coincidence or dissidence information F, so that a parity check on even an error of an even-numbered bit can be made.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4765279A JPS55139699A (en) | 1979-04-18 | 1979-04-18 | Error detection system of memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4765279A JPS55139699A (en) | 1979-04-18 | 1979-04-18 | Error detection system of memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55139699A true JPS55139699A (en) | 1980-10-31 |
Family
ID=12781175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4765279A Pending JPS55139699A (en) | 1979-04-18 | 1979-04-18 | Error detection system of memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55139699A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02142223A (en) * | 1988-11-24 | 1990-05-31 | Fujitsu Ltd | Parity check circuit |
-
1979
- 1979-04-18 JP JP4765279A patent/JPS55139699A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02142223A (en) * | 1988-11-24 | 1990-05-31 | Fujitsu Ltd | Parity check circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55105900A (en) | Error correction/detection system | |
JPS5539994A (en) | Multiprocessor system | |
JPS55139699A (en) | Error detection system of memory unit | |
JPS5792499A (en) | Directory device | |
JPS5570997A (en) | Error bit check system for read only memory | |
JPS5694596A (en) | Memory control system | |
JPS5750308A (en) | Time base correcting device | |
JPS6462736A (en) | Error detecting circuit | |
JPS5727342A (en) | Error checking system for error detecting correcting circuit | |
JPS5693196A (en) | Error detecting system of checking circuit | |
JPS5782298A (en) | Diagnostic system for storage device | |
JPS5557962A (en) | Error detection system | |
JPS56156981A (en) | Bubble memory device | |
JPS5642803A (en) | Input/output device for sequence controller | |
JPS54124947A (en) | Error check system of arithmetic circuit | |
JPS5498147A (en) | Register control system | |
JPS5346235A (en) | Memory check system | |
JPS5537634A (en) | Integrated-circuit device | |
JPS55115148A (en) | Error detection and correction system | |
JPS54129948A (en) | Data processor | |
GB1018762A (en) | Data transfer system | |
JPS56134398A (en) | Check system for error detecting and correcting circuit | |
JPS5512315A (en) | Electronic range | |
JPS56119997A (en) | Parity checking system of memory device | |
JPS5464939A (en) | Data transfer device |