JPS56153431A - Keyboard controlling system - Google Patents

Keyboard controlling system

Info

Publication number
JPS56153431A
JPS56153431A JP5750280A JP5750280A JPS56153431A JP S56153431 A JPS56153431 A JP S56153431A JP 5750280 A JP5750280 A JP 5750280A JP 5750280 A JP5750280 A JP 5750280A JP S56153431 A JPS56153431 A JP S56153431A
Authority
JP
Japan
Prior art keywords
register
circuit
keys
cpu
value
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
JP5750280A
Other languages
Japanese (ja)
Inventor
Takao Tomota
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 JP5750280A priority Critical patent/JPS56153431A/en
Publication of JPS56153431A publication Critical patent/JPS56153431A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE:To perform keyboard controlling by providing a control circuit which controls the set data of the 2nd register in accordance with the storage number of the 1st register and generating interruption to a CPU upon ending of the operation by the control circuit. CONSTITUTION:When two keys are pushed simultaneously, the value of either one key is set in a register 28. Since the HIT signal comes in twice before the carry signal Ca is outputted from a scan counter 21, a register controlling circuit 38 temporarily stores this value. When the carry signal Ca arrives from the scan counter 21, the circuit 38 decides that more than two keys are depressed simultaneously this time while the counter 21 makes one round. At this time, the circuit 38 outputs the separately determined specific code, for example, the clock for setting the all 1 as REG CONT to the register 28. Then, it generates interruption to a CPU.
JP5750280A 1980-04-30 1980-04-30 Keyboard controlling system Pending JPS56153431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5750280A JPS56153431A (en) 1980-04-30 1980-04-30 Keyboard controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5750280A JPS56153431A (en) 1980-04-30 1980-04-30 Keyboard controlling system

Publications (1)

Publication Number Publication Date
JPS56153431A true JPS56153431A (en) 1981-11-27

Family

ID=13057492

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5750280A Pending JPS56153431A (en) 1980-04-30 1980-04-30 Keyboard controlling system

Country Status (1)

Country Link
JP (1) JPS56153431A (en)

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