Int 21 Fn B304  U - Novell Netware - Set Signature Level                   [N]

   AX = B304h
   BX:CX = new signature level (see AX=B301h)

Return: ???

Note:  this function appeared with the packet signing/Large Internet Packets/
     IPX Checksum-aware NetWare shells

See Also: AX=B300h,AX=B301h,AX=B306h,#2561