Int 62 Fn 00BC  u - Fgdriver V4.02 - "fg_sound" - Make Sound For Specifie  [V]

   AX = 00BCh
   BX = frequency in Hertz (18-32767)
   CX = duration in clock ticks (0000h or negative for continuous sound)

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   This call is ignored if asynchronous sound (AX=00A5h,AX=00A8h,
     AX=00AAh) is already in progress

See Also: AX=0059h,AX=0080h,AX=00BDh,AX=00C0h,AX=00DBh