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Maltron 3D Ergonomic Keyboard

SafeType

 

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The frogpad

 

, . , 40 . , Shift-. г '.

The Twiddler 2

The Orbitouch

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The Datahand

QWERTY . , , . .

The Tidy Tippist

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ǒ ²

. , PDA , , , , . .

: . , . , IBM PC AT. , . , .

53. 04 ( ) , Y0Y2 () ( 1).

1.

04 1, Y0Y2 . , , pullup, (, Microchip PORTTB). . 1. Y0Y2. - , .

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, , 04 . , , , . , .

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2.

, , . 㳿 , , , IBM PCAT, , .  . , .

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3.

 

, . 4.

 

4.

璺 . , , , . 㳿 , , . , , . , .

㳿 . . ' . , . , 03 . S0...S10 , .

CASIO, -85. , 㳿 , .

, . , , 2030 . ' . , . 0. , . , . . ϳ .

5. 20

4

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=N*(N+1)

- , N .

, . , 㳺, 4 , 20!

 

S/2 : Ground, +5V, Data Clock. +5V , . Data Clock , 1. , , . - 10 .

S/2 . Data uik , , Data 1k , , . 1k. , Data 1k . 1k 0, , . , .

5-pin DIN (AT/XT): 1 - Clock 2 - Data 3 - 4 - Ground 5 - +5V  
6-pin Mini-DIN (PS/2): 1 - Data 2 - 3 - Ground 4 - +5V 5 - Clock 6 -
6-pin Mini-DIN (PS/2): A B - Data C - Ground D - Clock E - +5V F -

7. 璺 S/2

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- 33 , , 10 ... 20 .

. 11 :

1 ( 0);

8 , ;

1 ;

1 - ( 1).

'1 ', , '0', . ³ . , , . , .

1.

ED / Num Lock, Caps Lock, Scroll Lock. ϳ ACK (FA) , - 0 ... 2, : 0 - Scroll lock (1 - .), 1 - Num lock, 2 - Caps lock. 3 ... 7 . '. .
EE . , (EE). .
F0 -. ACK, (01, 02 03), . 00, ACK.
F2 ID (A3, AB). ACK (). .
F3 ( ). ϳ ACK (FA). : 0 .. .4 (00000 - 30 / , 11111 - 2 / ); 5 ... 6 - (00 - 250 , 11 - 1000 ); 7 - . ( ALT, Ctrl, Shift), Pause / Break. Pause / Break-, make. (Break). , , - , . .
F4 . . ACK (FA).
F5 -. ACK (FA). .
F6 ³ . .
F7 typematic - , . ACK (FA).
F8 make / break. ACK (FA).
F9 make. ACK (FA).
FA typematic / make / break. ACK (FA).
FB typematic. .
FC make / break. .
FD make. .
FE .
FF .

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