INT 2C PU - Cloaking - GET TRAPPING STATE OF SPECIFIED PORTIBM PC Portable (uses same BIOS as XT)
	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)
Note:	this function was first introduced with RM386 (RAM-MAN/386) v6.00
SeeAlso: AX=002Eh,AX=002Fh