HP Vectra Technical Reference Manual page 89

SF
_EVENT_OFF (AX =
040CH)
This subfunction disables the call to the pointer event routine.
On Entry: AH
=
F_IO_CONTROL (04H)
AL
=
SF_EVENT_OFF (OCH)
BP
=
V_LPOINTER (OOCOH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
SF
_CLIPPING_ON (AX =
040EH)
This subfunction enables logical device clipping. Physical device motion will be scaled to logical
space and will be clipped to avoid overflow or underflow. Clipping is activated for both absolute
and relative motion.
When there is a relative device mapped to this device driver, clipping works the best. It will make
sure that the new position always falls within the logical space.
On Entry: AH
=
F_IO_CONTROL (04H)
AL
=
SF_CLIPPING_ON (OEH)
BP
=
V_LPOINTER (OOCOH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
This subfunction disables logical device clipping. Physical device motion will be scaled to logical
space, but overflow or underflow may occur.
On Entry: AH
=
F_IO_CONTROL (04H)
AL
=
SF_CLIPPING_OFF (1
OH)
BP
=
V_LPOINTER (OCOH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
80 Input System and HP-HIL