INT 21 U - Novell NetWare - CHECK SIGNATURE LEVEL???                            
	AX = B301h
Return: AX = 0000h if supported???
	    BX:CX indicate signature level (see #01801)
Note:	this function appeared with the packet signing/Large Internet Packets/
	  IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. Checksum-aware NetWare shells
SeeAlso: AX=B300h,AX=B304h,#02875 at INT 2F/AX=7A20h/BX=0000h


(Table 01801)
Values for signature level indicator:
 0000h:0000h = signature level 0
 0002h:0000h = signature level 1
 0202h:0000h = signature level 2
 0202h:0202h = signature level 3