JPS56149651A - Checking system of parity detecting function - Google Patents

Checking system of parity detecting function

Info

Publication number
JPS56149651A
JPS56149651A JP5254880A JP5254880A JPS56149651A JP S56149651 A JPS56149651 A JP S56149651A JP 5254880 A JP5254880 A JP 5254880A JP 5254880 A JP5254880 A JP 5254880A JP S56149651 A JPS56149651 A JP S56149651A
Authority
JP
Japan
Prior art keywords
parity
circuit
error
detects
processor
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
JP5254880A
Other languages
Japanese (ja)
Other versions
JPS6052455B2 (en
Inventor
Tadaaki Imai
Masaaki Kobayashi
Kanzo Noda
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 JP55052548A priority Critical patent/JPS6052455B2/en
Publication of JPS56149651A publication Critical patent/JPS56149651A/en
Publication of JPS6052455B2 publication Critical patent/JPS6052455B2/en
Expired 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

Abstract

PURPOSE:To minimize both hard and soft of a secondary processor, by performing a check simultaneously for two parity detecting circuits with a pair of register and EOR circuit. CONSTITUTION:The channel 13 is connected to the main processor 1 and main memory 2 via the common bus C, and the secondary processor 2 is incoporated to control the data transfer between the memory 2 and the filing device 12. When the secondary processor 3 checks the parity detecting circuit 8 that detects the parity error of input signal and the parity detecting circuit 9 that detects the parity error of output signal sent to the bus C from the channel 13, ''1'' is set at the indication bit P in the register 6. And the output of the EOR circuit 7 is stored in the buffer 10 with the data containing a parity error. This parity error is detected by the circuit 8. When the processor 3 reads the data (including an error) stored in the buffer 10 to the latch 4', the circuit 9 detects an error.
JP55052548A 1980-04-21 1980-04-21 Parity detection function check method Expired JPS6052455B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55052548A JPS6052455B2 (en) 1980-04-21 1980-04-21 Parity detection function check method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55052548A JPS6052455B2 (en) 1980-04-21 1980-04-21 Parity detection function check method

Publications (2)

Publication Number Publication Date
JPS56149651A true JPS56149651A (en) 1981-11-19
JPS6052455B2 JPS6052455B2 (en) 1985-11-19

Family

ID=12917843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55052548A Expired JPS6052455B2 (en) 1980-04-21 1980-04-21 Parity detection function check method

Country Status (1)

Country Link
JP (1) JPS6052455B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008068600A (en) * 2006-09-15 2008-03-27 Ricoh Co Ltd Image formation device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03108950U (en) * 1990-02-23 1991-11-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008068600A (en) * 2006-09-15 2008-03-27 Ricoh Co Ltd Image formation device

Also Published As

Publication number Publication date
JPS6052455B2 (en) 1985-11-19

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