JPS54122046A - Address match and memory protection system - Google Patents

Address match and memory protection system

Info

Publication number
JPS54122046A
JPS54122046A JP2939078A JP2939078A JPS54122046A JP S54122046 A JPS54122046 A JP S54122046A JP 2939078 A JP2939078 A JP 2939078A JP 2939078 A JP2939078 A JP 2939078A JP S54122046 A JPS54122046 A JP S54122046A
Authority
JP
Japan
Prior art keywords
address
register
memory
comparator
memory protection
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
JP2939078A
Other languages
Japanese (ja)
Inventor
Yukiro Shiraokawa
Keizo Aoyanagi
Toshio Iwao
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 JP2939078A priority Critical patent/JPS54122046A/en
Publication of JPS54122046A publication Critical patent/JPS54122046A/en
Pending legal-status Critical Current

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  • Storage Device Security (AREA)

Abstract

PURPOSE: To reduce hardware in size by containing an address match register and a memory protective register in one register group and by making a comparison by a common-use comparator.
CONSTITUTION: To make address check, comparator 300 compares the address of a main memory from memory address register 100 with address information matched with the address of the main memory of address match register 201. Then, the address information is outputted from the comparator when the both agree. To make memory protection check, the address of the main memory of register 100 is compared with the memory protection partition of memory protective register 202. When they disagree, it is outputted from the comparator and a memory protection partition is selected again. In this way, registers 201 and 202 are constituted in one register group and the check is made by one comparator, so that the hardware can be reduced in size.
COPYRIGHT: (C)1979,JPO&Japio
JP2939078A 1978-03-15 1978-03-15 Address match and memory protection system Pending JPS54122046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2939078A JPS54122046A (en) 1978-03-15 1978-03-15 Address match and memory protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2939078A JPS54122046A (en) 1978-03-15 1978-03-15 Address match and memory protection system

Publications (1)

Publication Number Publication Date
JPS54122046A true JPS54122046A (en) 1979-09-21

Family

ID=12274805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2939078A Pending JPS54122046A (en) 1978-03-15 1978-03-15 Address match and memory protection system

Country Status (1)

Country Link
JP (1) JPS54122046A (en)

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