Int 10 Fn 4F13  - Vesa Vbe/ai (audio Interface) - Driver Chain/unchain     [s]

   AX = 4F13h
   BX = 0006h

Return: AL = 4Fh if function supported
   AH = status
       00h successful
       01h failed

See Also: AX=4F13h/BX=0000h,AX=4F13h/BX=0005h