JPS6428759A - Memory protecting system - Google Patents

Memory protecting system

Info

Publication number
JPS6428759A
JPS6428759A JP18331687A JP18331687A JPS6428759A JP S6428759 A JPS6428759 A JP S6428759A JP 18331687 A JP18331687 A JP 18331687A JP 18331687 A JP18331687 A JP 18331687A JP S6428759 A JPS6428759 A JP S6428759A
Authority
JP
Japan
Prior art keywords
space
virtual
real
address
alpha
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
JP18331687A
Other languages
Japanese (ja)
Inventor
Hideo Sawamoto
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP18331687A priority Critical patent/JPS6428759A/en
Publication of JPS6428759A publication Critical patent/JPS6428759A/en
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Abstract

PURPOSE:To extend the addresses of a virtual space and a real space by dividing the virtual space in two of VA and VB, dividing the real space into two of RA, and RB and protecting a storage to a space pair VA-RA and VB-RB obtained by an address conversion. CONSTITUTION:The virtual space is divided into the two of the virtual space VA of the part of a virtual address 0 to alpha-1 and the partial virtual space VB from a virtual address alpha to M and a boundary address (alpha) is held in a virtual space boundary register VBNND 3. The real space 2 is also divided into the two of the partial real space RA from a real address 0 to beta-1 and the partial real space RB from a real address beta to N and held in a boundary register RBND 4. Then, according to the address conversion, the space VA is mapped on the RA ad and the space VB on the RB, in the space pair VA-RA, the memory is protected in a main storing key 5 disposed for every block of the space RA and in the space pair VB-RB, the memory is protected for every space VB.
JP18331687A 1987-07-24 1987-07-24 Memory protecting system Pending JPS6428759A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18331687A JPS6428759A (en) 1987-07-24 1987-07-24 Memory protecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18331687A JPS6428759A (en) 1987-07-24 1987-07-24 Memory protecting system

Publications (1)

Publication Number Publication Date
JPS6428759A true JPS6428759A (en) 1989-01-31

Family

ID=16133566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18331687A Pending JPS6428759A (en) 1987-07-24 1987-07-24 Memory protecting system

Country Status (1)

Country Link
JP (1) JPS6428759A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19681353B4 (en) * 1996-02-22 2004-09-30 Il Hwa Co. Ltd., Guri Ginsenoside Mc, an intestinal flora metabolite of ginseng saponin - and use of ginsenoside M, two other 20(S)-protopanaxadiol derivatives or 20(S)-protopanaxatriol as anticancer agents

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19681353B4 (en) * 1996-02-22 2004-09-30 Il Hwa Co. Ltd., Guri Ginsenoside Mc, an intestinal flora metabolite of ginseng saponin - and use of ginsenoside M, two other 20(S)-protopanaxadiol derivatives or 20(S)-protopanaxatriol as anticancer agents

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