JPS5776645A - Electronic desk-top calculator - Google Patents

Electronic desk-top calculator

Info

Publication number
JPS5776645A
JPS5776645A JP15258880A JP15258880A JPS5776645A JP S5776645 A JPS5776645 A JP S5776645A JP 15258880 A JP15258880 A JP 15258880A JP 15258880 A JP15258880 A JP 15258880A JP S5776645 A JPS5776645 A JP S5776645A
Authority
JP
Japan
Prior art keywords
mode
calculation
gate
rounding
decimal point
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
JP15258880A
Other languages
Japanese (ja)
Inventor
Kuniharu Ito
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 JP15258880A priority Critical patent/JPS5776645A/en
Publication of JPS5776645A publication Critical patent/JPS5776645A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Calculators And Similar Devices (AREA)

Abstract

PURPOSE:To prevent the erroneous setting of a calculation made for displaying a set mode, by operating a specific key prior to the start of arithmetic. CONSTITUTION:For example, mode switches 13 and 14 for rounding and calculation down to the 2nd digit below the decimal point are set. In this case, when a mode detection signal 1a goes up to a high level, the rounding-mode switch 13 is on, the output of an AND gate 5 is high, and that of an OR gate 8 is also high. This high-level signal serves as the control signal 1e of a controller 1, which detects the rounding calculation mode being selected. The mode detection signal 1b is generated successively and the mode switch 14 for the calculation down to the 2nd digit below the decimal point is on, so an AND gate 6 and an OR gate 8 both generate highlevel outputs to generate the high-level control signal 1e, so that the controller 1 detects the mode of the calculation down to the 2nd digit below the decimal point being detected.
JP15258880A 1980-10-30 1980-10-30 Electronic desk-top calculator Pending JPS5776645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15258880A JPS5776645A (en) 1980-10-30 1980-10-30 Electronic desk-top calculator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15258880A JPS5776645A (en) 1980-10-30 1980-10-30 Electronic desk-top calculator

Publications (1)

Publication Number Publication Date
JPS5776645A true JPS5776645A (en) 1982-05-13

Family

ID=15543729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15258880A Pending JPS5776645A (en) 1980-10-30 1980-10-30 Electronic desk-top calculator

Country Status (1)

Country Link
JP (1) JPS5776645A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063657A (en) * 1983-09-16 1985-04-12 Sharp Corp Electronic calculator
JPS61175756A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175754A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175753A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175755A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6063657A (en) * 1983-09-16 1985-04-12 Sharp Corp Electronic calculator
JPS61175756A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175754A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175753A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device
JPS61175755A (en) * 1985-01-31 1986-08-07 Canon Inc Electronic device

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