JPS54100632A - Miniature electronic computer - Google Patents

Miniature electronic computer

Info

Publication number
JPS54100632A
JPS54100632A JP759278A JP759278A JPS54100632A JP S54100632 A JPS54100632 A JP S54100632A JP 759278 A JP759278 A JP 759278A JP 759278 A JP759278 A JP 759278A JP S54100632 A JPS54100632 A JP S54100632A
Authority
JP
Japan
Prior art keywords
arithmetic
register
permutation
perform
overflow
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
JP759278A
Other languages
Japanese (ja)
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 JP759278A priority Critical patent/JPS54100632A/en
Publication of JPS54100632A publication Critical patent/JPS54100632A/en
Pending legal-status Critical Current

Links

Landscapes

  • Calculators And Similar Devices (AREA)
  • Complex Calculations (AREA)

Abstract

PURPOSE: To make it possible to compute all permutation arithmetic of result numbers which can be displayed, only by making use of factorial arithmetic and also by adding a simple discriminating method.
CONSTITUTION: To perform permutation arithmetic nPr, operating numeral keys and an arithmetic indication key sets numerals (n) and (r) and a permutation arithmetic code to registers X, Y and F, and (n-r) is calculated and held in register A. When the contents of register X, namely, (n) is confirmed to be an integer, "1" is set to register Y. In case of the arithmetic of (n!), step SE discriminates whether or not the arithmetic becomes impossible due to the overflow of the arithmetic becomes impossible due to the overflow of the arithmetic register; when the arithmetic fo (n!) can be done, steps SF and SH perform the arithmetic of n!/(n-r)!. If the arithmetic of (n!) is impossible, steps SG, SI, SJ, and SK perform the arithmetic of n(n-1).(n-2)... (n-r+1).
COPYRIGHT: (C)1979,JPO&Japio
JP759278A 1978-01-26 1978-01-26 Miniature electronic computer Pending JPS54100632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP759278A JPS54100632A (en) 1978-01-26 1978-01-26 Miniature electronic computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP759278A JPS54100632A (en) 1978-01-26 1978-01-26 Miniature electronic computer

Publications (1)

Publication Number Publication Date
JPS54100632A true JPS54100632A (en) 1979-08-08

Family

ID=11670068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP759278A Pending JPS54100632A (en) 1978-01-26 1978-01-26 Miniature electronic computer

Country Status (1)

Country Link
JP (1) JPS54100632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192360U (en) * 1985-05-22 1986-11-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192360U (en) * 1985-05-22 1986-11-29

Similar Documents

Publication Publication Date Title
JPS57196656A (en) Telephone set for character input
JPS6491228A (en) Data processor
JPS5231717A (en) Integrated circuit for electronic musical instrument
JPS54100632A (en) Miniature electronic computer
JPS5663633A (en) Character input device
JPS51131238A (en) Electronic register
JPS54100633A (en) Miniature electronic computer
JPS5447550A (en) Change calculating device
JPS5543632A (en) Keyboard device
JPS561381A (en) Time and date setting system
JPS56114049A (en) Electronic computer
JPS5368128A (en) Key input system
JPS55134429A (en) Electronic apparatus
JPS56111688A (en) Electronic numbering device
JPS5617435A (en) Dividing circuit device
JPS564911A (en) Digital limiter
JPS52108735A (en) Display device
JPS5517487A (en) Display unit of electronic timer
JPS52104909A (en) Electronic musical instrument
JPS578832A (en) Small-number using device of registering device
JPS5467322A (en) Character converter
JPS5457929A (en) Minicomputer
JPS5326116A (en) Electronic musical instruments
JPS5564456A (en) Error code generating circuit
JPS5379437A (en) Key signal read-in system