INT 14 U - BWCOM14 - INITIALIZE                                                 
	AH = 57h
	DL = port number
Return: AL = initialization status (00h successful, 01h already initialized)
	CX = port status (0001h port redirected, 0002h and FFFFh failed)
Note:	after this call, all invocations of INT 14/AH=00h-03h for the specified
	  port will be handled by BWCOM14 until AH=58h is called
SeeAlso: AH=00h"SERIAL",AH=56h,AH=58h