JPS59109950A - Error processing system of control storage device - Google Patents

Error processing system of control storage device

Info

Publication number
JPS59109950A
JPS59109950A JP57219727A JP21972782A JPS59109950A JP S59109950 A JPS59109950 A JP S59109950A JP 57219727 A JP57219727 A JP 57219727A JP 21972782 A JP21972782 A JP 21972782A JP S59109950 A JPS59109950 A JP S59109950A
Authority
JP
Japan
Prior art keywords
parity
storage device
mode
parity bit
check
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
JP57219727A
Other languages
Japanese (ja)
Inventor
Kenji Nishida
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP57219727A priority Critical patent/JPS59109950A/en
Publication of JPS59109950A publication Critical patent/JPS59109950A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/22—Microcontrol or microprogram arrangements
    • G06F9/26—Address formation of the next micro-instruction ; Microprogram storage or retrieval arrangements
    • G06F9/262—Arrangements for next microinstruction selection
    • G06F9/268—Microinstruction selection not based on processing results, e.g. interrupt, patch, first cycle store, diagnostic programs

Abstract

PURPOSE:To change easily the contents of a control storage, and to simplify a validity check by changing a parity bit storage device of a control storage device of a data processing device so as to be rewritable, and rewriting it by a micro-instruction. CONSTITUTION:When a power source is turned on to a device, a mode control device 29 of a parity check is set to a parity generating mode, and a value of a parity bit added to a read-only memory device 21 by a micro-instruction is written successively in a parity bit storage device 22. Subsequently, when the mode controlling circuit 29 of a parity check is set to a parity check mode, and an address of the parity bit storage device 22 in which an erroneous parity bit is written is read out, a parity error is detected by a parity checking circuit 23, and a parity error signal 25 is generated.
JP57219727A 1982-12-15 1982-12-15 Error processing system of control storage device Pending JPS59109950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57219727A JPS59109950A (en) 1982-12-15 1982-12-15 Error processing system of control storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57219727A JPS59109950A (en) 1982-12-15 1982-12-15 Error processing system of control storage device

Publications (1)

Publication Number Publication Date
JPS59109950A true JPS59109950A (en) 1984-06-25

Family

ID=16740020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57219727A Pending JPS59109950A (en) 1982-12-15 1982-12-15 Error processing system of control storage device

Country Status (1)

Country Link
JP (1) JPS59109950A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0638733U (en) * 1991-11-28 1994-05-24 稔 大石 Removable baby mat cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0638733U (en) * 1991-11-28 1994-05-24 稔 大石 Removable baby mat cover

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