JPS5469333A - Display data conversion system - Google Patents
Display data conversion systemInfo
- 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
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
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) |
-
1977
- 1977-11-14 JP JP13650077A patent/JPS5469333A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS61651B2 (en) | 1986-01-10 |
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