Dell Inspiron 3800 System Reference Manual page 26

Using the Computer: Dell Inspiron 3800 System Reference
NOTES: When enabled, the DualPoint integrated pointing device (whether touch pad only, track stick only, or both) uses interrupt
request (IRQ) 12. No other device can use IRQ12 while the DualPoint integrated pointing device is enabled.
When you attach an external Personal System/2 (PS/2)-mouse to the computer, the DualPoint integrated pointing device is
automatically disabled.
Using the Touch Pad
The PS/2 touch pad detects the position of your finger over a touch-sensitive area to position the cursor within the display screen. The touch pad provides the
computer with full mouse functionality. The touch pad's two buttons, located directly below the touch pad, correspond to the left and right buttons on a standard
mouse.
Figure 5. PS/2 Touch Pad
To best use the touch pad, use the following techniques:
To move the cursor, lightly slide your finger over the smooth sensor area.
To select an object, gently tap once on the surface of the touch pad or use your thumb to press the left touch pad button. The touch pad buttons perform
standard mouse functions.
To select and move (or drag) an object, position the cursor on the object and double-tap on the touch pad. On the second tap, leave your finger on the
touch pad and move the selected object by sliding your finger across the surface.
To double-click an object, position the cursor on the object and then tap the touch pad or the left touch pad button twice.
Using the Track Stick
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