JPS56145600A - Detection system for memory destruction - Google Patents

Detection system for memory destruction

Info

Publication number
JPS56145600A
JPS56145600A JP4980380A JP4980380A JPS56145600A JP S56145600 A JPS56145600 A JP S56145600A JP 4980380 A JP4980380 A JP 4980380A JP 4980380 A JP4980380 A JP 4980380A JP S56145600 A JPS56145600 A JP S56145600A
Authority
JP
Japan
Prior art keywords
memory
contents
stored
destruction
coincide
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
JP4980380A
Other languages
Japanese (ja)
Inventor
Kenji Yamaguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4980380A priority Critical patent/JPS56145600A/en
Publication of JPS56145600A publication Critical patent/JPS56145600A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring

Abstract

PURPOSE:To detect the memory destruction surely, by outputting the alarm signal when the initial value and the current value of the memory do not coincide with each other. CONSTITUTION:Computer programs recorded on cards 1, magnetic tape 2, and paper tape 3 are stored in bulk memory 5 successively. Contents of memory 5 are added for every group section, which is designated by program group designating circuit 100, by adders 10 and 11 and are inputted and stored in registers 12 or 13. In this case, contents of memory 5 from the start address to the end address are stored in register 12 as the initial value. According to start command ST of the computer system, contents of memory 5 are stored in register 13. Contents of registers 12 and 13 are compared with each other by comparator 18; and if they do not coincide with each other, indicator 19 for the alarm indicating memory destruction is lit.
JP4980380A 1980-04-15 1980-04-15 Detection system for memory destruction Pending JPS56145600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4980380A JPS56145600A (en) 1980-04-15 1980-04-15 Detection system for memory destruction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4980380A JPS56145600A (en) 1980-04-15 1980-04-15 Detection system for memory destruction

Publications (1)

Publication Number Publication Date
JPS56145600A true JPS56145600A (en) 1981-11-12

Family

ID=12841295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4980380A Pending JPS56145600A (en) 1980-04-15 1980-04-15 Detection system for memory destruction

Country Status (1)

Country Link
JP (1) JPS56145600A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6459549A (en) * 1987-08-31 1989-03-07 Fujitsu Ltd System for protecting data in data processor
JPH01263855A (en) * 1988-04-15 1989-10-20 Nec Corp Parity bit application system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6459549A (en) * 1987-08-31 1989-03-07 Fujitsu Ltd System for protecting data in data processor
JPH01263855A (en) * 1988-04-15 1989-10-20 Nec Corp Parity bit application system

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