JPS54146552A - Interruption control system - Google Patents

Interruption control system

Info

Publication number
JPS54146552A
JPS54146552A JP5513678A JP5513678A JPS54146552A JP S54146552 A JPS54146552 A JP S54146552A JP 5513678 A JP5513678 A JP 5513678A JP 5513678 A JP5513678 A JP 5513678A JP S54146552 A JPS54146552 A JP S54146552A
Authority
JP
Japan
Prior art keywords
priority
register
interruption
circuit
1aw1n
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
JP5513678A
Other languages
Japanese (ja)
Inventor
Masaharu Hirayama
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 JP5513678A priority Critical patent/JPS54146552A/en
Publication of JPS54146552A publication Critical patent/JPS54146552A/en
Pending legal-status Critical Current

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  • Bus Control (AREA)

Abstract

PURPOSE: To ensure process of the interruption request in the proper state by providing the priority register and the register alteration circuit which alters the value of the priority register and then making the priority identical among all external units connected to the processor or changing the priority respectively.
CONSTITUTION: The interruption request signals given from plural external units which operate nonsynchronously are received, and the interruption request of the highest priority is accepted to send the interruption acceptance signal to the processor main body as well as to the external unit which delivers the interruption signal. In such control system, priority register 6 is provided to hold the value to decide the interruption priority for external units 1aW1n, along with register conversion circuit 7 which alters the contents of register 6. Thus, the interruption priority is decided by alteration circuit 7 to change the priority of register 6 when interruption acceptance circuit 3 accepts the interruptions of units 1aW1n or in case the contents of register 6 is altered by the command given from processor main body 2.
COPYRIGHT: (C)1979,JPO&Japio
JP5513678A 1978-05-09 1978-05-09 Interruption control system Pending JPS54146552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5513678A JPS54146552A (en) 1978-05-09 1978-05-09 Interruption control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5513678A JPS54146552A (en) 1978-05-09 1978-05-09 Interruption control system

Publications (1)

Publication Number Publication Date
JPS54146552A true JPS54146552A (en) 1979-11-15

Family

ID=12990358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5513678A Pending JPS54146552A (en) 1978-05-09 1978-05-09 Interruption control system

Country Status (1)

Country Link
JP (1) JPS54146552A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129473A (en) * 1980-03-17 1981-10-09 Ricoh Co Ltd Facsimile device with memory device
JPS576925A (en) * 1980-06-16 1982-01-13 Hitachi Ltd Priority selecting circuit
JPH01270161A (en) * 1988-04-22 1989-10-27 Hitachi Ltd Common bus control system
JPH01279354A (en) * 1988-04-28 1989-11-09 Internatl Business Mach Corp <Ibm> Data processing system having common bus and preference decision circuit
JPH02146658A (en) * 1988-11-29 1990-06-05 Nec Corp Priority processing system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129473A (en) * 1980-03-17 1981-10-09 Ricoh Co Ltd Facsimile device with memory device
JPH0335865B2 (en) * 1980-03-17 1991-05-29 Ricoh Kk
JPS576925A (en) * 1980-06-16 1982-01-13 Hitachi Ltd Priority selecting circuit
JPH01270161A (en) * 1988-04-22 1989-10-27 Hitachi Ltd Common bus control system
JPH01279354A (en) * 1988-04-28 1989-11-09 Internatl Business Mach Corp <Ibm> Data processing system having common bus and preference decision circuit
JPH02146658A (en) * 1988-11-29 1990-06-05 Nec Corp Priority processing system

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