Format of SK-UPPS Protocol Status Block (PSB):
Offset	Size	Description	)
 00h	DWORD	-> ASCIZ 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)