INT 14 - X00 FOSSIL - DEACTIVATE PORT
        AH = 1Dh
        DX = port number
Return: none
Notes:  this is a duplicate of AH=05h, so that AH=05h may be made compatible
          with the PS/2 BIOS in a future release
        ignored if the port was never activated with AH=04h or AH=1Ch
SeeAlso: AH=1Ch