Texas Instruments Extensa 450 Series, Руководство по обслуживанию

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1.4.2
Touchpad Pointing Device
All members of the Extensa family feature a built-in Touchpad pointing device
located near the center of the keyboard’s palmrest. With light presure, the cursor
can quickly be positioned to the desired point; a quick double tap on the Touchpad
and you have selected an object. Two select buttons (switches) are located along the
front edge of the notebook
.
1.4.3
Keyboard
The Extensa Series Keyboard is an 83/84-key, IBM enhanced-type keyboard with
the standard character and function keys plus 12 programmable function keys (F1
through F12).
Using the Special Function ( Fn ) key which assigns multiple functions to keys, the
keyboard can emulate the IBM 101/102 keyboards using 83 keys (84 on
international models).
The keyboard has a 2.77 mm stroke and features a special keyboard interface chip
that can detect multiple levels of key input (good simulation of N-key rollover for up
to 10 keys).
Some of the major features of the keyboard include:
•
2.77-mm Key movement
•
Integrated numeric keypad
•
“Inverted T" Cursor Control Key layout
Figure1-4 Extensa Touchpad
1-6 General Description