Int 62 Fn 0054  u - Fgdriver V3.03 - "fg_kbtest" - Check Whether Specifie  [V]

   AX = 0054h
   BX = scan code of desired key

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

Notes: For FGDRIVER v1.10, this function was "FG_FLIPMASK" (see AX=002Ah);
     "FG_KBTEST" did not exist yet
   The low-level keyboard handler must have been enabled with AX=0053h

See Also: AX=0053h,INT 16/AH=01h