Int 2C Fn 0030  PU - Rm386 V6.00 - Cloaking - Get Trapping State Of Speci  [m]

   AX = 0030h
   DX = port number

Return: CF clear if successful
      BX = current state (0000h not trapped, 0001h trapped)
   CF set on error (port out of range or reserved)

See Also: AX=002Eh,AX=002Fh