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 PROTOCOL STATUS
	AX = 000Ch
	BX = protocol ID (see #03849,AX=000Bh)
	ES:DI -> Protocol Status Block (see #03856)
Return: AX = completion code (see #03846)
SeeAlso: AX=000Bh,AX=0014h


Format of SK-UPPS Protocol Status Block (PSB):
Offset	Size	Description	(Table 03856)
 00h	DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	-> ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. protocol name
 04h	WORD	protocol mode (see #03850)
 06h	WORD	protocol type (see AX=0007h)
 08h	WORD	number of registered multicasts (see AX=0009h,AX=0014h)