JPS5683898A - Prom error detection system - Google Patents
Prom error detection systemInfo
- Publication number
- JPS5683898A JPS5683898A JP16122879A JP16122879A JPS5683898A JP S5683898 A JPS5683898 A JP S5683898A JP 16122879 A JP16122879 A JP 16122879A JP 16122879 A JP16122879 A JP 16122879A JP S5683898 A JPS5683898 A JP S5683898A
- Authority
- JP
- Japan
- Prior art keywords
- prom
- elements
- written
- data
- anomaly
- 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
- Read Only Memory (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE: To detect rapidly a PROM element where anomaly occured, by displaying an error element on a basis of comparison between a check data for every element stored in a prescribed area of the PROM and a data of the element.
CONSTITUTION: PROM12 which constitutes a cash register or the like together with CPU11, totaling memory 13, and so on is formed with memory elements 121... where K-byte information is written in a prescribed address position respectively, and in element 12N, not only information forming a part of the program is written similarly to other elements 121... but also check data such as exclusive OR of storage information words of elements 121... are written in prescribed address areas P0.... By this constitution of ROM12, at the anomaly occurrence time of the cash register or the line, storage data for every element 121... is subjected to exclusive OR processing and is compared with check data in addresses P0... of element 12N to display elements 121... for disagreement, and thus, the PROM element where anomaly occurs is detected rapidly without connection to the external device.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16122879A JPS5683898A (en) | 1979-12-12 | 1979-12-12 | Prom error detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16122879A JPS5683898A (en) | 1979-12-12 | 1979-12-12 | Prom error detection system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5683898A true JPS5683898A (en) | 1981-07-08 |
Family
ID=15731056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16122879A Pending JPS5683898A (en) | 1979-12-12 | 1979-12-12 | Prom error detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5683898A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52112243A (en) * | 1976-03-17 | 1977-09-20 | Nippon Signal Co Ltd:The | Error detection system for exclusive reading memory |
JPS54114131A (en) * | 1978-02-27 | 1979-09-06 | Toyoda Machine Works Ltd | Method of diagnosing read only memory |
JPS54117641A (en) * | 1978-03-06 | 1979-09-12 | Fujitsu Fanuc Ltd | Memory inspecting system |
-
1979
- 1979-12-12 JP JP16122879A patent/JPS5683898A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52112243A (en) * | 1976-03-17 | 1977-09-20 | Nippon Signal Co Ltd:The | Error detection system for exclusive reading memory |
JPS54114131A (en) * | 1978-02-27 | 1979-09-06 | Toyoda Machine Works Ltd | Method of diagnosing read only memory |
JPS54117641A (en) * | 1978-03-06 | 1979-09-12 | Fujitsu Fanuc Ltd | Memory inspecting system |
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