HP Vectra Technical Reference Manual page 222

On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
,... SF_MOUSE_COM (AX
=
0400H)
This function is used by the BIOS to initialize INT 33H after MS-DOS has been initialized. This
function checks for the presence of a mouse. If the mouse is found then INT 33H, is set up to
point to the mouse driver. If no mouse is found, then INT 33H is not initialized.
On Entry: AH
=
F _IO_CONTROL (04H)
AL
=
SF_MOUSE_COM (OOH)
BP
=
V_LHPMOUSE (OOCCH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
SF_MOUSE_OVERRIDE (AX
=
0402H)
This function is used to set up INT 33H even if there is no mouse present. This function is
provided in case an application wishes to map any GID device to the V_LHPMOUSE driver. Since
no mouse is connected to the HP-HIL link, the mouse driver will not be installed, thus this
function enables you to override what is currently at INT 33H.
On Entry: AH
=
F _IO_CONTROL (04H)
AL
=
SF_MOUSE_OVERRIDE (02H)
BP
=
V_LHPMOUSE (OOCCH)
On Exit: AH
=
Return Status Code
Registers Altered: AX, BP, DS
Mouse 213