Int 6F Fn 0400  - Hp Vectra Ex-bios - "f_io_ctrl Sf_enable_svc" - Unmask   [b]

   AX = 0400h
   BP = 001Eh (driver ID for V_S8259)

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

See Also: AH=00h"HP Vectra",AX=0402h"SF_DISABLE_SVC",AX=0404h"SF_ENABLE_KBD"

See Also: AX=0408h"SF_ENABLE_HPHIL"