JPS6424444U - - Google Patents

Info

Publication number
JPS6424444U
JPS6424444U JP11708587U JP11708587U JPS6424444U JP S6424444 U JPS6424444 U JP S6424444U JP 11708587 U JP11708587 U JP 11708587U JP 11708587 U JP11708587 U JP 11708587U JP S6424444 U JPS6424444 U JP S6424444U
Authority
JP
Japan
Prior art keywords
keyboard
flip
flop
microprocessor
keyboard unit
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
JP11708587U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP11708587U priority Critical patent/JPS6424444U/ja
Publication of JPS6424444U publication Critical patent/JPS6424444U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例を示すブロツク図、第
２図は本考案を採用したときの使用形態を図式化
して示したもの、第３図及び第４図は従来の使用
形態を図式化して示したものである。 １…マイクロプロセツサ、２…デコーダ、３…
フリツプフロツプ、４〜６…ゲート、７，８…キ
ーボードコントローラ、９，１０…キーボードユ
ニツト。 Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the usage pattern when the invention is adopted, and Figs. 3 and 4 are diagrams showing the conventional usage pattern. This is what is shown. 1...Microprocessor, 2...Decoder, 3...
Flip-flop, 4-6...gate, 7,8...keyboard controller, 9,10...keyboard unit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 標準装備されるキーボードユニツトを制御する
キーボードコントローラと、外付されるキーボー
ドユニツトを制御するキーボードコントローラと
、いずれのキーボードコントローラによるコント
ロールを有効とするか、マイクロプロセツサによ
り値が設定されるフリツプフロツプと、マイクロ
プロセツサから発せられるキーボードアドレスを
デコードするアドレスデコードと、アドレスデコ
ード信号と上記フリツプフロツプ出力により上記
キーボードコントローラのいずれか一方をイネー
ブルにするゲート回路と、上記フリツプフロツプ
に対し適宜値を設定すると共にこのフリツプフロ
ツプが示す値に従がい外付けキーボードユニツト
の接続の有無を調べ標準キーボードユニツトもし
くは外付けキーボードユニツトからキーコードの
取込みを行なうマイクロプロセツサとを具備する
ことを特徴とするパーソナルコンピユータ。 A keyboard controller that controls the standard keyboard unit, a keyboard controller that controls the external keyboard unit, and a flip-flop whose value is set by a microprocessor to determine which keyboard controller is to be enabled for control. an address decoder for decoding a keyboard address issued from a microprocessor; a gate circuit for enabling one of the keyboard controllers using the address decode signal and the flip-flop output; and a gate circuit for setting appropriate values for the flip-flop and controlling the flip-flop. 1. A personal computer characterized by comprising: a microprocessor that checks whether an external keyboard unit is connected according to the value indicated by , and reads a key code from a standard keyboard unit or an external keyboard unit.
JP11708587U 1987-07-30 1987-07-30 Pending JPS6424444U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11708587U JPS6424444U (en) 1987-07-30 1987-07-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11708587U JPS6424444U (en) 1987-07-30 1987-07-30

Publications (1)

Publication Number Publication Date
JPS6424444U true JPS6424444U (en) 1989-02-09

Family

ID=31360216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11708587U Pending JPS6424444U (en) 1987-07-30 1987-07-30

Country Status (1)

Country Link
JP (1) JPS6424444U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59627A (en) * 1982-06-28 1984-01-05 Tokyo Electric Co Ltd Electronic balance
JPS5952461A (en) * 1982-09-16 1984-03-27 Toshiba Corp Disc record reproducer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59627A (en) * 1982-06-28 1984-01-05 Tokyo Electric Co Ltd Electronic balance
JPS5952461A (en) * 1982-09-16 1984-03-27 Toshiba Corp Disc record reproducer

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