JPS62158538U - - Google Patents
Info
- Publication number
- JPS62158538U JPS62158538U JP4624186U JP4624186U JPS62158538U JP S62158538 U JPS62158538 U JP S62158538U JP 4624186 U JP4624186 U JP 4624186U JP 4624186 U JP4624186 U JP 4624186U JP S62158538 U JPS62158538 U JP S62158538U
- Authority
- JP
- Japan
- Prior art keywords
- keyboard
- optional
- controller
- contact
- closing
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Input From Keyboards Or The Like (AREA)
Description
第１図は本考案のキーボード制御回路を有する
システムの一実施例を示したブロツク図、第２図
は第１図に示した標準キーボードとオプシヨンキ
ーボードの詳細回路図である。
１……標準キーボード、２……オプシヨンキー
ボード、３……計算機本体、１１……キーボード
コントローラ、Ｒ１〜Ｒ３……リターンライン、
Ｓ１〜Ｓ３……スキヤンライン、イ……接点。
FIG. 1 is a block diagram showing an embodiment of a system having a keyboard control circuit according to the present invention, and FIG. 2 is a detailed circuit diagram of the standard keyboard and optional keyboard shown in FIG. 1...Standard keyboard, 2...Optional keyboard, 3...Computer main body, 11...Keyboard controller, R1 to R3...Return line,
S1 to S3...Scan line, A...Contact point.
Claims (1)
ターンラインを前記オプシヨンキーボードが接続
される標準キーボードのキーボードコントローラ
に制御させるシステムにおいて、前記オプシヨン
キーボードのスキヤンラインとリターンラインに
よつて形成される複数の接点の中の１つを常に閉
路する閉路手段と、前記キーボードコントローラ
が前記接点の閉路を検出した場合はオプシヨンキ
ーボード有りと、前記接点の閉路を検出しない場
合はオプシヨンキーボード無しと前記コントロー
ラに判断させる制御手段とを具備したことを特徴
とするキーボード制御回路。 In a system in which the scan line and return line of an optional keyboard are controlled by a keyboard controller of a standard keyboard to which the optional keyboard is connected, one of a plurality of contact points formed by the scan line and return line of the optional keyboard. and control means for causing the controller to determine that the optional keyboard is present when the keyboard controller detects the closing of the contact, and that the optional keyboard is not present when the keyboard controller does not detect the closing of the contact. A keyboard control circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4624186U JPS62158538U (en) | 1986-03-31 | 1986-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4624186U JPS62158538U (en) | 1986-03-31 | 1986-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62158538U true JPS62158538U (en) | 1987-10-08 |
Family
ID=30865724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4624186U Pending JPS62158538U (en) | 1986-03-31 | 1986-03-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62158538U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61165121A (en) * | 1984-12-17 | 1986-07-25 | Fujitsu Ltd | Keyboard connection detecting system |
-
1986
- 1986-03-31 JP JP4624186U patent/JPS62158538U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61165121A (en) * | 1984-12-17 | 1986-07-25 | Fujitsu Ltd | Keyboard connection detecting system |