HP Vectra Technical Reference Manual page 136

On Entry: AH
=
F_ISR (DOH)
DH
=
Data Type
DL
=
Physical device driver's vector address / 6
BP
=
HP-HIL device n vector address
For Button Event:
BX
=
Button information.
Bit
OFH-08H
07H
06H-OOH
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
SF _INIT (AX = 0200H)
This subfunction is called to initialize the driver.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_INIT (OOH)
BP
=
HP-HIL device n vector address
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
Input System and HP-HIL 127