Int 94  u - Media Vision Pcm.com - Check Board Address                     [s]

   SI = 8002h

Return: AX = status
       0000h if board not at specified I/O address
       other if board found

Note:  the I/O address is specified by ORing the base I/O port shifted left
     four bits into SI before calling INT 94

See Also: SI=8000h