Int 2C Fn 002F  PU - Cloaking - Untrap I/o Port                            [m]

   AX = 002Fh
   DX = port number for which to cancel trapping

Return: CF clear if successful
   CF set on error (port out of range or reserved)

Note:  this function was first introduced with RM386 (RAM-MAN/386) v6.00

See Also: AX=002Eh,AX=0030h