JPS55150200A - Check system for memory destruction - Google Patents

Check system for memory destruction

Info

Publication number
JPS55150200A
JPS55150200A JP5730079A JP5730079A JPS55150200A JP S55150200 A JPS55150200 A JP S55150200A JP 5730079 A JP5730079 A JP 5730079A JP 5730079 A JP5730079 A JP 5730079A JP S55150200 A JPS55150200 A JP S55150200A
Authority
JP
Japan
Prior art keywords
redundant information
memory
address
simplifies
destroyed
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
JP5730079A
Other languages
Japanese (ja)
Inventor
Tadashi Koizumi
Masato Suyama
Shiro Manabe
Keisuke Okajima
Kazumi Endo
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon 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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP5730079A priority Critical patent/JPS55150200A/en
Publication of JPS55150200A publication Critical patent/JPS55150200A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To obtain a memory destruction check system of simple constitution which simplifies measures against software bugs by generating redundant information corresponding to a random part of a memory and then by checking whether the part is destroyed.
CONSTITUTION: When an instruction consisting of function code (f) for redundant information generation, and operands 1 and 2 assigning address (a) and word length (n) is decoded, the address and redundant information are stored in registers WR1 and WR4 by way of work registers WR1WWR4 and an arithmetic circuit connected to bus. When code (f) shows an end instruction for the memory check by redundant information, the redundant information is similarly stored in data buffer DB according to the address of register WR1 and then compared to the contents of register WR4, thereby checking whether a random part in memory is destroyed by using the redundant information. Therefore, a system of simple constitution is realized which eliminates the need for time division and simplifies measures against software bugs.
COPYRIGHT: (C)1980,JPO&Japio
JP5730079A 1979-05-10 1979-05-10 Check system for memory destruction Pending JPS55150200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5730079A JPS55150200A (en) 1979-05-10 1979-05-10 Check system for memory destruction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5730079A JPS55150200A (en) 1979-05-10 1979-05-10 Check system for memory destruction

Publications (1)

Publication Number Publication Date
JPS55150200A true JPS55150200A (en) 1980-11-21

Family

ID=13051696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5730079A Pending JPS55150200A (en) 1979-05-10 1979-05-10 Check system for memory destruction

Country Status (1)

Country Link
JP (1) JPS55150200A (en)

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