HP Vectra Technical Reference Manual page 111

Table 4.11
GID Motion ISR Event Record
AH
=
F_'SR (OOH)
DL
=
Physical device driver's vector address / 6
BX
=
X axis motion in raw data form.
CX
=
Y axis motion in raw data form.
DH
=
Data Type
ES:O
=
Pointer to physical device driver header and Physical Describe Record.
The button number in the Button Transition Information field (BX) denotes which button on the
device is reporting data. Of special interest is button seven (proximity indicator) which is currently
used by absolute devices to indicate that the device measurement field is active, ie. someone is
touching the touch screen or the stylus is in contact with the tablet surface.
The Data Type field (DH) contains a code representing the current type of physical GID data
stored in the event record. For button events this value will be T_KC_BUnON. For a complete
list of physical GID event data types see table 4.12.
Table 4.12
Physical GID Event Data Types
Type
T_KC_BUTTON
T_REL08
T_REL16
T--.-ABS08
T--.-ABS16
Value Definition
09H Button data.
40H Signed 8 bit relative data
41 H Signed 16 bit relative data
42H Unsigned 8 bit absolute data
43H Unsigned 16 bit absolute data
4.3.3 Hardware Interface Level Drivers
This section describes the hardware interface level drivers in detail.
102 Input System and HP-HIL