JPS5467347A - Microprogram control system of control unit - Google Patents

Microprogram control system of control unit

Info

Publication number
JPS5467347A
JPS5467347A JP13349277A JP13349277A JPS5467347A JP S5467347 A JPS5467347 A JP S5467347A JP 13349277 A JP13349277 A JP 13349277A JP 13349277 A JP13349277 A JP 13349277A JP S5467347 A JPS5467347 A JP S5467347A
Authority
JP
Japan
Prior art keywords
register
microprogram
processor
diode
control unit
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
JP13349277A
Other languages
Japanese (ja)
Inventor
Kazuo Takagi
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 JP13349277A priority Critical patent/JPS5467347A/en
Publication of JPS5467347A publication Critical patent/JPS5467347A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the maintenanceability, by enabling to trace the program and making wasy for troubleshooting, through the addition of a simple circuit.
CONSTITUTION: In the control unit performing control with the microprogram by using the microprocessor 1, the buffer register 11 inputting the data on the processor bus 7 is connected to the processor 1 for the input terminal DI via the selector 4. Further, the register 11 monitors the progressive path of the microprogram, one end of the light emitting diode 12 for display is connected to the output terminals DO1 to DOn of the register 11, and another end of the diode 12 is connected to the power supply +V in common connection via the resistor 13. Further, the signal corresponding to the present processing rate is stored to the register 11 every processing step of program by the processor 1. Further, if any failure is taken place, display is made by the diode 12, making easy for troubleshooting.
COPYRIGHT: (C)1979,JPO&Japio
JP13349277A 1977-11-09 1977-11-09 Microprogram control system of control unit Pending JPS5467347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13349277A JPS5467347A (en) 1977-11-09 1977-11-09 Microprogram control system of control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13349277A JPS5467347A (en) 1977-11-09 1977-11-09 Microprogram control system of control unit

Publications (1)

Publication Number Publication Date
JPS5467347A true JPS5467347A (en) 1979-05-30

Family

ID=15106024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13349277A Pending JPS5467347A (en) 1977-11-09 1977-11-09 Microprogram control system of control unit

Country Status (1)

Country Link
JP (1) JPS5467347A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5697160A (en) * 1980-01-07 1981-08-05 Hitachi Ltd Display system of cause to computer stop
JPS57157362A (en) * 1981-03-25 1982-09-28 Hitachi Ltd Method and apparatus of execution path career data pickup for architecture program
JPS57185548A (en) * 1981-05-12 1982-11-15 Olympus Optical Co Ltd Detecting method for computer operation failure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5697160A (en) * 1980-01-07 1981-08-05 Hitachi Ltd Display system of cause to computer stop
JPS57157362A (en) * 1981-03-25 1982-09-28 Hitachi Ltd Method and apparatus of execution path career data pickup for architecture program
JPS57185548A (en) * 1981-05-12 1982-11-15 Olympus Optical Co Ltd Detecting method for computer operation failure

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