JPS55127638A - Digital arithmetic unit - Google Patents
Digital arithmetic unitInfo
- 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
Links
- 101001106432 Homo sapiens Rod outer segment membrane protein 1 Proteins 0.000 abstract 4
- 102100021424 Rod outer segment membrane protein 1 Human genes 0.000 abstract 4
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
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)
| 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 |
| JPS60254372A (en) * | 1984-05-31 | 1985-12-16 | Nippon Precision Saakitsutsu Kk | Arithmetic unit for sum of products |
| JPS60254876A (en) * | 1984-05-31 | 1985-12-16 | Fuji Xerox Co Ltd | Shading correcting device |
| 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 |
-
1979
- 1979-03-26 JP JP3746879A patent/JPS55127638A/en active Pending
Cited By (8)
| 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 |
| JPS60254372A (en) * | 1984-05-31 | 1985-12-16 | Nippon Precision Saakitsutsu Kk | Arithmetic unit for sum of products |
| JPS60254876A (en) * | 1984-05-31 | 1985-12-16 | Fuji Xerox Co Ltd | Shading correcting device |
| 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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