JPS564849A - Microprogram control unit - Google Patents

Microprogram control unit

Info

Publication number
JPS564849A
JPS564849A JP8039079A JP8039079A JPS564849A JP S564849 A JPS564849 A JP S564849A JP 8039079 A JP8039079 A JP 8039079A JP 8039079 A JP8039079 A JP 8039079A JP S564849 A JPS564849 A JP S564849A
Authority
JP
Japan
Prior art keywords
bit error
circuit
rewrite
detected
microinstruction
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
JP8039079A
Other languages
Japanese (ja)
Inventor
Hiroyuki Wakita
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8039079A priority Critical patent/JPS564849A/en
Publication of JPS564849A publication Critical patent/JPS564849A/en
Pending legal-status Critical Current

Links

Landscapes

  • Detection And Correction Of Errors (AREA)

Abstract

PURPOSE: To prevent the degrading of performance due to one bit error of the control memory, by placing the rewrite-in to the control memory after the correction of one bit error detected at the readout of microinstruction under the control of microprogram.
CONSTITUTION: The microprogram sequentially reads out the content of the control memory 1 indicated at the microinstruction address register 2 to the microinstruction register 3. The content of the register 3 is inspected at the one bit error detection circuit 4. The signal at the circuit 4 is informed to the rewrite-in determining circuit 9. The circuit 9 starts the rewrite-in circuit 6 according to the output of FF7 indicating the propriety of rewrite-in. When one bit error is detected, the microinstruction detected for the error is corrected at the one bit error correction circuit 5 and executed. When one bit error is produced and the event of correction is detected at the microprogram, suitable processing is executed.
COPYRIGHT: (C)1981,JPO&Japio
JP8039079A 1979-06-26 1979-06-26 Microprogram control unit Pending JPS564849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8039079A JPS564849A (en) 1979-06-26 1979-06-26 Microprogram control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8039079A JPS564849A (en) 1979-06-26 1979-06-26 Microprogram control unit

Publications (1)

Publication Number Publication Date
JPS564849A true JPS564849A (en) 1981-01-19

Family

ID=13716952

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8039079A Pending JPS564849A (en) 1979-06-26 1979-06-26 Microprogram control unit

Country Status (1)

Country Link
JP (1) JPS564849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132839A (en) * 1982-02-01 1983-08-08 Nec Corp Fault recovery device
JPS6242038U (en) * 1985-08-30 1987-03-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132839A (en) * 1982-02-01 1983-08-08 Nec Corp Fault recovery device
JPS6242038U (en) * 1985-08-30 1987-03-13

Similar Documents

Publication Publication Date Title
JPS5671808A (en) Processing system for reproduction signal
JPS564849A (en) Microprogram control unit
JPS57143799A (en) Storage device
JPS52108872A (en) Ultrasonic flaw detector
JPS5619593A (en) Parity check processing system for memory
JPS55119750A (en) Processor providing test address function
JPS54111725A (en) Error processing system in memory unit
JPS55119755A (en) Processor providing test instruction function
JPS5410616A (en) Automatic destination reading circuit for facsimile
JPS5395532A (en) Error correction system for read only memory unit
JPS5576445A (en) Pre-fetch control system
JPS5617543A (en) Axial ratio compensating circuit
JPS5683154A (en) Transmission method for pcm data
JPS5781043A (en) Paper conveyance detection circuit
JPS5593596A (en) Memory unit
JPS5578357A (en) Program overrun detection unit
JPS57758A (en) Computer
JPS55164930A (en) Signal fetch unit
JPS5525117A (en) Check circuit for signal group
JPS5547547A (en) Control device
JPS5694600A (en) Data error processing system for main storage device
JPS5543658A (en) Control system for microorder execution
JPS5532137A (en) Detector for program loop
JPS535610A (en) Error correction method
JPS5552598A (en) Data processor