Int 6F Fn 0408  - Hp Vectra Ex-bios - "f_io_ctrl Sf_create_event" - Set E  [b]

   AX = 0408h
   BP = driver ID (see #3412) for V_LPOINTER, V_LTOUCH, V_LTABLET
   ES:SI -> new event handler (see AH=00h"HP Vectra")
   DX = new handler's DS

Return: AH = status (see #3415)
   ES:SI -> old event handler
   DX = old handler's DS
   BP,DS destroyed
Desc:  specify routine to be called on logical device events

Note:  when events occur, the event handler is called with the same registers
     as the "F_ISR" function on AH=00h"HP Vectra"

See Also: AH=00h"HP Vectra",AX=0400h"SF_LOCK",AX=0406h"SF_TRACK_OFF"

See Also: AX=040Ah"SF_EVENT_ON",AX=040Ch"SF_EVENT_OFF",AH=06h"F_SAMPLE"