JPS5545169A - Memory unit - Google Patents

Memory unit

Info

Publication number
JPS5545169A
JPS5545169A JP11877178A JP11877178A JPS5545169A JP S5545169 A JPS5545169 A JP S5545169A JP 11877178 A JP11877178 A JP 11877178A JP 11877178 A JP11877178 A JP 11877178A JP S5545169 A JPS5545169 A JP S5545169A
Authority
JP
Japan
Prior art keywords
address
block
memory
substitute
constitution
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
JP11877178A
Other languages
Japanese (ja)
Inventor
Toshiyuki Furui
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11877178A priority Critical patent/JPS5545169A/en
Publication of JPS5545169A publication Critical patent/JPS5545169A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To improve the rate of operation by using a blank block of a memory by comparing an address with that of a trouble block of the memory and then by converting the address into a substitute-block address in case of a coinicidence.
CONSTITUTION: When a block in memory 1 gets out of order, the address of the block is stored in address register 4 by way of information processor 6. Comparator circuit 3 makes a comparison between this address and that from processor 6 and when the both agree each other, address switching circuit 2 is changed over by circuit 3 to attain access to memory 1 using a substitute-block address stored in register 5. In this constitution, a blank block is used at need to improve the rate of operation of the memory.
COPYRIGHT: (C)1980,JPO&Japio
JP11877178A 1978-09-26 1978-09-26 Memory unit Pending JPS5545169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11877178A JPS5545169A (en) 1978-09-26 1978-09-26 Memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11877178A JPS5545169A (en) 1978-09-26 1978-09-26 Memory unit

Publications (1)

Publication Number Publication Date
JPS5545169A true JPS5545169A (en) 1980-03-29

Family

ID=14744655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11877178A Pending JPS5545169A (en) 1978-09-26 1978-09-26 Memory unit

Country Status (1)

Country Link
JP (1) JPS5545169A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095662A (en) * 1983-10-28 1985-05-29 Fujitsu Ltd Memory error correcting method
JPH04134544A (en) * 1990-09-26 1992-05-08 Nec Corp Information processor
US6367030B1 (en) 1997-10-09 2002-04-02 Matsushita Electric Industrial Co., Ltd. Address conversion circuit and address conversion system with redundancy decision circuitry

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6095662A (en) * 1983-10-28 1985-05-29 Fujitsu Ltd Memory error correcting method
JPH04134544A (en) * 1990-09-26 1992-05-08 Nec Corp Information processor
US6367030B1 (en) 1997-10-09 2002-04-02 Matsushita Electric Industrial Co., Ltd. Address conversion circuit and address conversion system with redundancy decision circuitry

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