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JPS5658197A - Memory data checking method - Google Patents

Memory data checking method

Info

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
Application number
JP13295979A
Other languages
Japanese (ja)
Inventor
Fumio Arai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Medical Corp filed Critical Hitachi Medical Corp
Priority to JP13295979A priority Critical patent/JPS5658197A/en
Publication of JPS5658197A publication Critical patent/JPS5658197A/en
Pending legal-status Critical Current

Links

Landscapes

  • Detection And Correction Of Errors (AREA)
  • Techniques For Improving Reliability Of Storages (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
JP13295979A 1979-10-17 1979-10-17 Memory data checking method Pending JPS5658197A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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