JPS5658197A - Memory data checking method - Google Patents
Memory data checking methodInfo
- Publication number
- JPS5658197A JPS5658197A JP13295979A JP13295979A JPS5658197A JP S5658197 A JPS5658197 A JP S5658197A JP 13295979 A JP13295979 A JP 13295979A JP 13295979 A JP13295979 A JP 13295979A JP S5658197 A JPS5658197 A JP S5658197A
- Authority
- JP
- Japan
- Prior art keywords
- data
- address
- addresses
- sum value
- total sum
- 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)
- Detection And Correction Of Errors (AREA)
Abstract
PURPOSE: To ensure an assured detection for the error of the memory data, by inspecting the coincidence between the total sum value of the data obtained previously and the total sum value of the actual data.
CONSTITUTION: The fixed data are stored in the addresses 0Wn-1 of the ROM memory MEM, and the total sum value obtained by adding all data of the addresses 0Wn-1 is stored in the address n. When the data is checked by the CPU, the address is designated for the corresponding memory among the memories MEM1WMEMi, and then the data are read for the data checking subject addresses 0Wn-1 to be integrated by the accumulator. This accumulated data is then compared with the data of the address n when the integration of all data is over, and if an agreement is obtained between them, the data of the MEM can be decided as correct, otherwise in case no agreement is obtained, the data is decided as incorrect and displayed as an error.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13295979A JPS5658197A (en) | 1979-10-17 | 1979-10-17 | Memory data checking method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13295979A JPS5658197A (en) | 1979-10-17 | 1979-10-17 | Memory data checking method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5658197A true JPS5658197A (en) | 1981-05-21 |
Family
ID=15093492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13295979A Pending JPS5658197A (en) | 1979-10-17 | 1979-10-17 | Memory data checking method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5658197A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58163089A (en) * | 1982-03-24 | 1983-09-27 | グローリー工業株式会社 | Coin sorter |
JPS5987555A (en) * | 1982-11-10 | 1984-05-21 | Oki Electric Ind Co Ltd | Hash total checking system of microprogram rom |
JPS59178695A (en) * | 1983-03-30 | 1984-10-09 | Nittan Co Ltd | Checking device of read-only memory |
JPS6332400U (en) * | 1986-08-20 | 1988-03-02 | ||
JPH0394337A (en) * | 1981-07-02 | 1991-04-19 | Texas Instr Inc <Ti> | Microcomputer device |
-
1979
- 1979-10-17 JP JP13295979A patent/JPS5658197A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0394337A (en) * | 1981-07-02 | 1991-04-19 | Texas Instr Inc <Ti> | Microcomputer device |
JPS58163089A (en) * | 1982-03-24 | 1983-09-27 | グローリー工業株式会社 | Coin sorter |
JPH0136157B2 (en) * | 1982-03-24 | 1989-07-28 | Glory Kogyo Kk | |
JPS5987555A (en) * | 1982-11-10 | 1984-05-21 | Oki Electric Ind Co Ltd | Hash total checking system of microprogram rom |
JPS6319897B2 (en) * | 1982-11-10 | 1988-04-25 | Oki Electric Ind Co Ltd | |
JPS59178695A (en) * | 1983-03-30 | 1984-10-09 | Nittan Co Ltd | Checking device of read-only memory |
JPS6332400U (en) * | 1986-08-20 | 1988-03-02 |
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