Int 62 Fn 0069  u - Fgdriver V4.02 - "fg_kbtest" - Check Whether Specifie  [V]

   AX = 0069h
   BX = scan code of desired key

Return: AX = state
       0000h key is not pressed
       0001h key is currently pressed

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   The low-level keyboard handler must have been enabled with AX=0066h

See Also: AX=0066h,AX=0067h,INT 16/AH=01h