JPS5794842A - Arithmetic device - Google Patents

Arithmetic device

Info

Publication number
JPS5794842A
JPS5794842A JP55171010A JP17101080A JPS5794842A JP S5794842 A JPS5794842 A JP S5794842A JP 55171010 A JP55171010 A JP 55171010A JP 17101080 A JP17101080 A JP 17101080A JP S5794842 A JPS5794842 A JP S5794842A
Authority
JP
Japan
Prior art keywords
register
output
bit
parity bit
parity
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
JP55171010A
Other languages
Japanese (ja)
Other versions
JPS6049933B2 (en
Inventor
Tetsuji Ogawa
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 JP55171010A priority Critical patent/JPS6049933B2/en
Publication of JPS5794842A publication Critical patent/JPS5794842A/en
Publication of JPS6049933B2 publication Critical patent/JPS6049933B2/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
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
    • G06F11/2226—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test ALU
    • 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 simplify the diagnosing procedur of hardware with high efficiency, by securing an optional operation fo the parity bit. CONSTITUTION:An operated including a parity bit P is set to an input register 1, and an operand of one byte is set to an input register 2 of the other side. These outputs receive an arithmetic operation by a selection circuit 5, an arithmetic circuit 7, a selection circuit 13, a parity producing circuit 6, an output register 4, a selection circuit 15, etc. During the diagnosis of hardware, etc., the data bit in the reigster 1 is directly set to an output register 4 in the form of an output data bit. For the parity bit, however, the result obtained through a logical arithmetic carried with the specific bit of the contents of the register 2 is set to the register 4 in the form of an output parity bit. Accordingly, the output parity bit can be freely operated by the data which is applied to the register 2.
JP55171010A 1980-12-05 1980-12-05 computing device Expired JPS6049933B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171010A JPS6049933B2 (en) 1980-12-05 1980-12-05 computing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171010A JPS6049933B2 (en) 1980-12-05 1980-12-05 computing device

Publications (2)

Publication Number Publication Date
JPS5794842A true JPS5794842A (en) 1982-06-12
JPS6049933B2 JPS6049933B2 (en) 1985-11-06

Family

ID=15915416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171010A Expired JPS6049933B2 (en) 1980-12-05 1980-12-05 computing device

Country Status (1)

Country Link
JP (1) JPS6049933B2 (en)

Also Published As

Publication number Publication date
JPS6049933B2 (en) 1985-11-06

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