JPS5730053A - Memory parity check system - Google Patents

Memory parity check system

Info

Publication number
JPS5730053A
JPS5730053A JP10542180A JP10542180A JPS5730053A JP S5730053 A JPS5730053 A JP S5730053A JP 10542180 A JP10542180 A JP 10542180A JP 10542180 A JP10542180 A JP 10542180A JP S5730053 A JPS5730053 A JP S5730053A
Authority
JP
Japan
Prior art keywords
parity check
parity
screen
memory
generator
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.)
Granted
Application number
JP10542180A
Other languages
Japanese (ja)
Other versions
JPS61655B2 (en
Inventor
Toshiharu Kaizawa
Juichi Sakai
Shogo Takayama
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10542180A priority Critical patent/JPS5730053A/en
Publication of JPS5730053A publication Critical patent/JPS5730053A/en
Publication of JPS61655B2 publication Critical patent/JPS61655B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Detection And Correction Of Errors (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To make parity memory independent and to reduce the memory capacity, by making the parity check for screen display through the use of vacant time of MPU cycle. CONSTITUTION:In MPU cycle, signals are written in odd and even number of screen memories 10,11 and the parity formed at a parity check generator 13 is stored in a parity memory 12. Next, the characters alternately read out from the screen memories 10,11 with a chip selection circuit 15 at the remaining time of the MPU cycle are made for parity check with the generator 13 and the memory 12. If any error takes place, the generator 13 outputs an error signal to make eror display on the screen. As to the DMA cycle, the memories 10 and 11 are selected at the same time and screen display is made by the transfer by one character.
JP10542180A 1980-07-31 1980-07-31 Memory parity check system Granted JPS5730053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10542180A JPS5730053A (en) 1980-07-31 1980-07-31 Memory parity check system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10542180A JPS5730053A (en) 1980-07-31 1980-07-31 Memory parity check system

Publications (2)

Publication Number Publication Date
JPS5730053A true JPS5730053A (en) 1982-02-18
JPS61655B2 JPS61655B2 (en) 1986-01-10

Family

ID=14407127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10542180A Granted JPS5730053A (en) 1980-07-31 1980-07-31 Memory parity check system

Country Status (1)

Country Link
JP (1) JPS5730053A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002259202A (en) * 2001-03-05 2002-09-13 Toyo Commun Equip Co Ltd Exclusive control sequencer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8906275B2 (en) 2012-05-29 2014-12-09 Nike, Inc. Textured elements incorporating non-woven textile materials and methods for manufacturing the textured elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002259202A (en) * 2001-03-05 2002-09-13 Toyo Commun Equip Co Ltd Exclusive control sequencer

Also Published As

Publication number Publication date
JPS61655B2 (en) 1986-01-10

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