JPS5447540A - Fault correction system for control memory - Google Patents

Fault correction system for control memory

Info

Publication number
JPS5447540A
JPS5447540A JP11330377A JP11330377A JPS5447540A JP S5447540 A JPS5447540 A JP S5447540A JP 11330377 A JP11330377 A JP 11330377A JP 11330377 A JP11330377 A JP 11330377A JP S5447540 A JPS5447540 A JP S5447540A
Authority
JP
Japan
Prior art keywords
address
fault
memory
circuit
data
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
JP11330377A
Other languages
Japanese (ja)
Inventor
Tsuguo Hatsuda
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 JP11330377A priority Critical patent/JPS5447540A/en
Publication of JPS5447540A publication Critical patent/JPS5447540A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To read out the correction contents with no installation of the auxiliary control memory and thus to simplify the constitution for the reaccess of the faulty address, by memorizing separately the address where the fault occurs and the corrected contents of te memory which has some fault.
CONSTITUTION: To the fault correction system of the control memory adopting the microprogram system,parity check circuit 8 to detect the fault of control memory is installed, along with address memory register 4 to memorize the address of memory 2 when the fault is detected by circuit 8, and harming correction circuit 6 to correct the faulty data of the detected address. In addition, data memory register 7 is added to memorize the corrected data, along with reading data register 3 connected to selection circuit 10. When an access is given to the faulty address, the contents of register 7 is read out at circuit 10 and based on the result of comparator 5. And in the case of the address free from the fault, the reading is inhibited for the correction data
COPYRIGHT: (C)1979,JPO&Japio
JP11330377A 1977-09-22 1977-09-22 Fault correction system for control memory Pending JPS5447540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11330377A JPS5447540A (en) 1977-09-22 1977-09-22 Fault correction system for control memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11330377A JPS5447540A (en) 1977-09-22 1977-09-22 Fault correction system for control memory

Publications (1)

Publication Number Publication Date
JPS5447540A true JPS5447540A (en) 1979-04-14

Family

ID=14608796

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11330377A Pending JPS5447540A (en) 1977-09-22 1977-09-22 Fault correction system for control memory

Country Status (1)

Country Link
JP (1) JPS5447540A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525193A (en) * 1978-08-04 1980-02-22 Honeywell Inf Systems Method and device for feeding accurate data
JPS6061837A (en) * 1983-09-13 1985-04-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Error corrector
JPS60110041A (en) * 1983-11-21 1985-06-15 Hitachi Ltd Back-up device for generation of parity error
JPH01191945A (en) * 1988-01-27 1989-08-02 Nec Corp Microprogram controller
JPH02144633A (en) * 1988-11-25 1990-06-04 Nec Corp Error correcting device for control storage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5525193A (en) * 1978-08-04 1980-02-22 Honeywell Inf Systems Method and device for feeding accurate data
JPS6061837A (en) * 1983-09-13 1985-04-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Error corrector
JPS60110041A (en) * 1983-11-21 1985-06-15 Hitachi Ltd Back-up device for generation of parity error
JPH01191945A (en) * 1988-01-27 1989-08-02 Nec Corp Microprogram controller
JPH02144633A (en) * 1988-11-25 1990-06-04 Nec Corp Error correcting device for control storage

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