Int 2F Fn BC0E  - Mediavision Mvsound.sys - Re-initialize Int 09 Handler   [s]

   AX = BC0Eh

Return: BX = status
       0000h on failure
       AX = 0000h
       FFFFh if successful
       DX:AX -> prior INT 09 handler
Desc:  re-initialize INT 09 handler to re-enable hotkeys (e.g. after loading
     KEYB)