Int 6F Fn 040C  - Hp Vectra Ex-bios - "f_io_ctrl Sf_crv_repeat" - Set Key  [b]

   AX = 040Ch
   BP = 0114h (driver ID for V_HPHIL)
   BX = device address indicator (see #3431)
   DH = HP HIL device major address
   DL = repeat rate (00h = 30 Hz, 01h = 60 Hz)

Return: AH = status (see #3415)
   BP,DS destroyed

Note:  this function is only available if the driver is in the open state
     (see AX=020Eh"SF_OPEN")

See Also: AH=00h"HP Vectra",AX=040Ah/BP=0114h,AX=040Eh/BP=0114h