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Интерфейс TI-99/4A Keyboard - разводка кабеля, техническая информация, описание

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TI-99/4A Keyboard

UNKNOWN connector (inside the console) Red wire is #15

Pin 12 13 14 15 9 8 6
5 = . , M N /
4 space L K J H ;
1 enter O I U Y P
2 9 8 7 6 0
7 fctn 2 3 4 5 1 lock
3 shift S D F G A
10 ctrl W E R T Q
11 X C V B Z

Note:
Pressing a key closes the contact between corresponding row + column. Since there are no diodes to prevent current going backwards, pressing 3 keys at a time often results in appearance of a "phantom" key at the 4th corner of the square formed by these keys (e.g 8+7+3=phantom 4: current goes pin15-7-8-3-pin7 as if 4 were pressed).

Contributor: Joakim Цgren
Source: ?

Информация предоставлена справочником The Hardware Book Team 1996-2004.

Навигатор: QRZ.RU > Радиолюбительские справочники > Справочник компьютерного инженера