JPS5699528A - Timer device of computer system - Google Patents

Timer device of computer system

Info

Publication number
JPS5699528A
JPS5699528A JP170380A JP170380A JPS5699528A JP S5699528 A JPS5699528 A JP S5699528A JP 170380 A JP170380 A JP 170380A JP 170380 A JP170380 A JP 170380A JP S5699528 A JPS5699528 A JP S5699528A
Authority
JP
Japan
Prior art keywords
cpu
timer
interruption
apparatus except
timer device
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
JP170380A
Other languages
Japanese (ja)
Other versions
JPS633328B2 (en
Inventor
Masao Suga
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP170380A priority Critical patent/JPS5699528A/en
Publication of JPS5699528A publication Critical patent/JPS5699528A/en
Publication of JPS633328B2 publication Critical patent/JPS633328B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F9/46—Multiprogramming arrangements
    • G06F9/48—Program initiating; Program switching, e.g. by interrupt
    • G06F9/4806—Task transfer initiation or dispatching
    • G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
    • G06F9/4825—Interrupt from clock, e.g. time of day

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To elevate the operation efficiency of the CPU by providing a clock generating circuit and a timer register TR on the apparatus except the CPU. CONSTITUTION:In the computer system, its timer device is provided on the outside of the CPU. On the timer device are provided the MV register R23 for storing the matching value MV which is sent from the CPU through the data bus 17, and the clock counter CC24 which counts up at every constant time and reads out a timer signal from other apparatus except the CPU through the bus 17. The output of the MVR23 is compared with that of the CC24 by the comparator 25, and when the count value of the CC24 has exceeded the contents of the MVR23, the comparator 25 outputs a timer interruption start signal 27 to the interruption control circuit 26. As a result, the circuit 26 starts the operation and executes the interruption to the CPU. Accordingly, since the interruption is executed to the CPU only when it has been designated by the CPU, the operation efficiency of the CPU is elevated, and also each apparatus except the CPU is able to display the time, etc. independently.
JP170380A 1980-01-10 1980-01-10 Timer device of computer system Granted JPS5699528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP170380A JPS5699528A (en) 1980-01-10 1980-01-10 Timer device of computer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP170380A JPS5699528A (en) 1980-01-10 1980-01-10 Timer device of computer system

Publications (2)

Publication Number Publication Date
JPS5699528A true JPS5699528A (en) 1981-08-10
JPS633328B2 JPS633328B2 (en) 1988-01-22

Family

ID=11508900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP170380A Granted JPS5699528A (en) 1980-01-10 1980-01-10 Timer device of computer system

Country Status (1)

Country Link
JP (1) JPS5699528A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250739A (en) * 1985-04-26 1986-11-07 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Data source system
JPH02250119A (en) * 1988-08-19 1990-10-05 Motorola Inc Timer with multiple timer reference function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02302222A (en) * 1989-05-17 1990-12-14 Matsushita Electric Ind Co Ltd Electric hot-water heater

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4943079A (en) * 1972-08-30 1974-04-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4943079A (en) * 1972-08-30 1974-04-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250739A (en) * 1985-04-26 1986-11-07 フィリップス　エレクトロニクス　ネムローゼ　フェンノートシャップ Data source system
JPH02250119A (en) * 1988-08-19 1990-10-05 Motorola Inc Timer with multiple timer reference function

Also Published As

Publication number Publication date
JPS633328B2 (en) 1988-01-22

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