JPS56153428A - Key input controlling system - Google Patents
Key input controlling systemInfo
- Publication number
- JPS56153428A JPS56153428A JP5669080A JP5669080A JPS56153428A JP S56153428 A JPS56153428 A JP S56153428A JP 5669080 A JP5669080 A JP 5669080A JP 5669080 A JP5669080 A JP 5669080A JP S56153428 A JPS56153428 A JP S56153428A
- Authority
- JP
- Japan
- Prior art keywords
- key
- pushed
- keys
- turned
- key input
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Calculators And Similar Devices (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
PURPOSE:To perform N-key roll-over by so arranging the system that when the number of the keys which are on changes from a certain value N to N+1, the input of that key is not read in and the key input is read when the keys which are already in on-state are turned off. CONSTITUTION:When the key B is pressed while the key A is being pushed, the contents of key code buffers l1, l2 when A is first pushed are l1=A, l2=0, and A is inputted to a key input buffer by step S31 S32. As S34 is executed, they are l1=A, l2=O, l3A, l4=O. Thereafter, when B is pushed, they are l1=A, l2=B. Therefore, the step advances to S27 S36 S39 S40, at S40, the code conversion of B takes place and B is inputted to the input buffer at S32. Thereafter, when S34 is executed, they are l3=A, l4=B. Further, if the C key is pushed in this state, more than 3 keys are turned on and if the A key is turned off, the C key turns on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669080A JPS56153428A (en) | 1980-04-28 | 1980-04-28 | Key input controlling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5669080A JPS56153428A (en) | 1980-04-28 | 1980-04-28 | Key input controlling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56153428A true JPS56153428A (en) | 1981-11-27 |
Family
ID=13034436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5669080A Pending JPS56153428A (en) | 1980-04-28 | 1980-04-28 | Key input controlling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56153428A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH036314U (en) * | 1989-06-07 | 1991-01-22 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092641A (en) * | 1973-12-14 | 1975-07-24 | ||
| JPS5253629A (en) * | 1975-10-24 | 1977-04-30 | Tektronix Inc | Keyboard device |
| JPS54122928A (en) * | 1978-03-17 | 1979-09-22 | Hitachi Ltd | Keyboard control circuit |
-
1980
- 1980-04-28 JP JP5669080A patent/JPS56153428A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5092641A (en) * | 1973-12-14 | 1975-07-24 | ||
| JPS5253629A (en) * | 1975-10-24 | 1977-04-30 | Tektronix Inc | Keyboard device |
| JPS54122928A (en) * | 1978-03-17 | 1979-09-22 | Hitachi Ltd | Keyboard control circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH036314U (en) * | 1989-06-07 | 1991-01-22 |
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