JPS57189399A - Storage protection device - Google Patents

Storage protection device

Info

Publication number
JPS57189399A
JPS57189399A JP56072806A JP7280681A JPS57189399A JP S57189399 A JPS57189399 A JP S57189399A JP 56072806 A JP56072806 A JP 56072806A JP 7280681 A JP7280681 A JP 7280681A JP S57189399 A JPS57189399 A JP S57189399A
Authority
JP
Japan
Prior art keywords
storage
storage device
addresses
information
awf
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
JP56072806A
Other languages
Japanese (ja)
Inventor
Masao Ono
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56072806A priority Critical patent/JPS57189399A/en
Publication of JPS57189399A publication Critical patent/JPS57189399A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make the delicate setting of protection areas possible by writing storage protection information into an RAM to be accessed at the same addresses as those of a storage device and reading out the information of said RAM at every access to the storage device.
CONSTITUTION: An RAM23 having respective storage units to be accessed by the same address 22 as that of a storage device to be protected of storage is provided, and storage protection information is written beforehand in only the storage units of the same addresses as the addresses AWF of the storages 1W3 to be protected out of the storages 24 of the storage device in this RAM23. At every access to the storage device, the information stored in the storage units of the RAM21 is read out by using the same addresses AWF.
COPYRIGHT: (C)1982,JPO&Japio
JP56072806A 1981-05-14 1981-05-14 Storage protection device Pending JPS57189399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56072806A JPS57189399A (en) 1981-05-14 1981-05-14 Storage protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56072806A JPS57189399A (en) 1981-05-14 1981-05-14 Storage protection device

Publications (1)

Publication Number Publication Date
JPS57189399A true JPS57189399A (en) 1982-11-20

Family

ID=13500000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56072806A Pending JPS57189399A (en) 1981-05-14 1981-05-14 Storage protection device

Country Status (1)

Country Link
JP (1) JPS57189399A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62150438A (en) * 1985-12-24 1987-07-04 Omron Tateisi Electronics Co Program protect device for control equipment
JPS62293585A (en) * 1986-06-13 1987-12-21 Hitachi Ltd Semiconductor storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62150438A (en) * 1985-12-24 1987-07-04 Omron Tateisi Electronics Co Program protect device for control equipment
JPS62293585A (en) * 1986-06-13 1987-12-21 Hitachi Ltd Semiconductor storage device

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