INT 7C - SK-UPPS Data Link Interface API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. - GET MULTICAST LIST
	AX = 0014h
	BX = protocol ID (see #03849,AX=000Bh)
	ES:DI -> multicast address buffer
	CX = number of 6-byte multicast addresses that may be stored in buffer
Return: AX = completion code (see #03846)
	CX = number of registered multicast addresses for this protocol
	  (regardless of value returned in AX)
	multicast address buffer filled with multicast addresses registered for
	  this protocol
Note:	If the buffer supplied is too small, CX still contains the total number
	  of registered multicast addresses for this protocol and the buffer
	  has been completely filled
SeeAlso: AX=000Bh,AX=0009h,AX=000Ch