JPS5469333A - Display data conversion system - Google Patents

Display data conversion system

Info

Publication number
JPS5469333A
JPS5469333A JP13650077A JP13650077A JPS5469333A JP S5469333 A JPS5469333 A JP S5469333A JP 13650077 A JP13650077 A JP 13650077A JP 13650077 A JP13650077 A JP 13650077A JP S5469333 A JPS5469333 A JP S5469333A
Authority
JP
Japan
Prior art keywords
data
key
exponential
mantissa
decoder
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
JP13650077A
Other languages
Japanese (ja)
Other versions
JPS61651B2 (en
Inventor
Tomohiro Shimizu
Yutaka Takeuchi
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP13650077A priority Critical patent/JPS5469333A/en
Publication of JPS5469333A publication Critical patent/JPS5469333A/en
Publication of JPS61651B2 publication Critical patent/JPS61651B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Calculators And Similar Devices (AREA)
  • Digital Computer Display Output (AREA)

Abstract

PURPOSE: To simplify the key operation adjusting the unit of data to reduce generation of error operation by increasing or decreasing exponental data by 3 in every operation of a specified key and, at the same time, changing the position of a decimal point of mantissa data according to the exponential data.
CONSTITUTION: In the miniature electronic computer where mantissa display portion and exponential display portion are set and operation with exponential data is performed by using ROM1, RAM3, operation decoder 8, timing decoder 9, and arithmetic circuit 16, conversion key 25a which converts display data to exponetial form and inversion key 25b are set on key input portion 25. When the region which stores flags F and I of keys 25a and 25b are set on the register of memory region of RAM3 and input of keys 25a and 25b is detected by buffer B4, flags F and I are outputted to terminal C0 of ROM1 and various kinds of control signals are outputted from decoder 9, so that data can be increased or decreased by 3 by the use of gates G11 and G12 and latches 20 and 21. A decimal point of mantissa data is shifted by 3 digit in every time when data are increased or decreased.
COPYRIGHT: (C)1979,JPO&Japio
JP13650077A 1977-11-14 1977-11-14 Display data conversion system Granted JPS5469333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13650077A JPS5469333A (en) 1977-11-14 1977-11-14 Display data conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13650077A JPS5469333A (en) 1977-11-14 1977-11-14 Display data conversion system

Publications (2)

Publication Number Publication Date
JPS5469333A true JPS5469333A (en) 1979-06-04
JPS61651B2 JPS61651B2 (en) 1986-01-10

Family

ID=15176609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13650077A Granted JPS5469333A (en) 1977-11-14 1977-11-14 Display data conversion system

Country Status (1)

Country Link
JP (1) JPS5469333A (en)

Also Published As

Publication number Publication date
JPS61651B2 (en) 1986-01-10

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