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6.3 Touch Panel Control Function
The keyboard controller has incorporated a program for acquiring the touch coordinates of the touch
panel. This program compensates these acquired coordinates with the values obtained through
calibration so that correct coordinate values can be calculated. The calculated coordinates will be
passed to a ROM-resident program called PEN BIOS when mouse interrupt occurs.
The following diagram shows an operational flow until the coordinates acquired by the keyboard
controller are passed to the application program as a mouse event.
Touch Panel
Keyboard
IRQ12 and P260
Controller
ROM BIOS
(Coordinate)
Mouse Event
User Program
PENMOUSE.DRV
MS-Windows
Fig. 6.4
90
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