Chapter # 15 ( Keyoard Part-2 )

AT Keyboard 84 Keys

84 keys Keyboard was introduced in 1984 by IBM. There were 84 buttons in this keyboard and many problems of previous computers and keyboards were solved with it. In this Keyboard, the button of "ENTER" was replaced with a large space.

Position and sizes of "Shift" buttons were also changes. IBM introduced LEP wires for Scroll Lock and Caps Lock buttons in it. IBM's 84 Keyboard's distinctive competency was that, its processor was placed in Keyboard itself. These two processors could easily communicate & exchange data with each other. Mother Board's processor 8042 Keyboard can also called as "Controller Chip" This chip can send data and guild lines to Keyboard through which functions of Keyboard can be changed. This controller also possess qualities of Scan Contraction which can transfer different foreign languages to its Keyboard.

Actually scan transactions are some electronic lights which travels from mother board to keyboard. For correction of these electro lights functions, LED symbols were included in that Keyboard. Although 84 buttons Keyboard was a good keyboard of that time but, was still facing some criticism on the size and sequence of buttons.