JPS55127638A - Digital arithmetic unit - Google Patents

Digital arithmetic unit

Info

Publication number
JPS55127638A
JPS55127638A JP3746879A JP3746879A JPS55127638A JP S55127638 A JPS55127638 A JP S55127638A JP 3746879 A JP3746879 A JP 3746879A JP 3746879 A JP3746879 A JP 3746879A JP S55127638 A JPS55127638 A JP S55127638A
Authority
JP
Japan
Prior art keywords
operated
operand
information
rom1
operation information
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
JP3746879A
Other languages
Japanese (ja)
Inventor
Toshiyuki Araki
Isato Kazama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP3746879A priority Critical patent/JPS55127638A/en
Publication of JPS55127638A publication Critical patent/JPS55127638A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to reduce the memory capacity of ROM regarding an arithmetic result as a ROM output while using an operand and operated operand as addresses of ROM.
CONSTITUTION: A fixed pattern is previously stored in ROM1 and an operand and operated operand are used as addresses of ROM1 so as to make it possible to obtain an arithmetic result from the output of ROM1. Here, operated information is compared 6 with operation information and when it is judged that the operated information is greater than operation information, the operated information is supplied to the 1st address assignment input terminal, and the operation information to the 2nd address assignment input terminal. On the other hand, when the operated information is less than the operation information, the operated information is supplied to the 2nd address assignment input terminal by switching 7 while the operation information is supplied to the 1st address assignment input terminal. Consequently, when the combination of the operand and operated operand is the same, the capacity of ROM can be reduced by commonly assigning the address of the arithmetic result of ROM1.
COPYRIGHT: (C)1980,JPO&Japio
JP3746879A 1979-03-26 1979-03-26 Digital arithmetic unit Pending JPS55127638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3746879A JPS55127638A (en) 1979-03-26 1979-03-26 Digital arithmetic unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3746879A JPS55127638A (en) 1979-03-26 1979-03-26 Digital arithmetic unit

Publications (1)

Publication Number Publication Date
JPS55127638A true JPS55127638A (en) 1980-10-02

Family

ID=12498347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3746879A Pending JPS55127638A (en) 1979-03-26 1979-03-26 Digital arithmetic unit

Country Status (1)

Country Link
JP (1) JPS55127638A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5884080U (en) * 1981-12-02 1983-06-07 三菱電機株式会社 Sewing machine needle bar crank rod
JPS6037985U (en) * 1983-08-19 1985-03-15 三洋電機株式会社 Three-way trunk circuit
JPS60178372A (en) * 1984-01-19 1985-09-12 ノーザン　テレコム　リミテッド Digital navstar receiver
JPS60254876A (en) * 1984-05-31 1985-12-16 Fuji Xerox Co Ltd Shading correcting device
JPS60254372A (en) * 1984-05-31 1985-12-16 Nippon Precision Saakitsutsu Kk Arithmetic unit for sum of products
JPS6136839A (en) * 1984-07-30 1986-02-21 Aisuke Katayama Parallel compensation system for high-speed multiplication with code
JPS61284686A (en) * 1985-06-12 1986-12-15 Japan Radio Co Ltd Gps navigation device
JPS6243732A (en) * 1985-08-20 1987-02-25 Nec Corp Multiplier

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5884080U (en) * 1981-12-02 1983-06-07 三菱電機株式会社 Sewing machine needle bar crank rod
JPS6037985U (en) * 1983-08-19 1985-03-15 三洋電機株式会社 Three-way trunk circuit
JPH0328626Y2 (en) * 1983-08-19 1991-06-19
JPS60178372A (en) * 1984-01-19 1985-09-12 ノーザン　テレコム　リミテッド Digital navstar receiver
JPS60254876A (en) * 1984-05-31 1985-12-16 Fuji Xerox Co Ltd Shading correcting device
JPS60254372A (en) * 1984-05-31 1985-12-16 Nippon Precision Saakitsutsu Kk Arithmetic unit for sum of products
JPS6136839A (en) * 1984-07-30 1986-02-21 Aisuke Katayama Parallel compensation system for high-speed multiplication with code
JPS61284686A (en) * 1985-06-12 1986-12-15 Japan Radio Co Ltd Gps navigation device
JPS6243732A (en) * 1985-08-20 1987-02-25 Nec Corp Multiplier

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