HP Vectra Technical Reference Manual page 74

Touch Screen Driver Functions Definitions
F_ISR (AH
=
OOH)
,... This function receives an ISR Event record from one of the physical GID drivers. The calling driver
has handled the physical interrupt and updated the Physical Describe Record to reflect the event.
This function translates the physical event into the logical coordinate system and calls its parent,
V_EVENT_TOUCH, (if EVENT is enabled). In addition, this function passes the event to
V_STRACK so that the sprite can be updated (if TRACK is enabled). This function is a response
to a logical hardware interrupt and not user callable.
On Entry: AH
=
F_ISR (OOH)
DH
=
Data Type
DL
=
Physical device driver's vector index.
ES:O
=
Pointer to Physical device driver header and Physical Describe Record.
BP
=
V_LTOUCH (00C6H)
For Button Event:
BX
=
Button information.
Bit
OFH-08H
07H
06H-00H
Value Definition
Reserved
1 Button up
o
Button down
Button number (0-7)
For Motion Event:
BX
=
X axis motion in raw data form.
CX
=
Y axis motion in raw data form.
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
Related Functions: SF_CREATE_EVENT, SF_EVENT_ON, SF_TRACie-ON
SF _INIT (AX = 0200H)
This subfunction is called to initialize the driver. Refer to Section 9 for a complete discussion of
the protocol used in data space allocation.
Input System and HP-HIL 65