Int 7A  U - Novell Netware - Ipx Driver - Internal - Get Driver Packt Siz  [N]

   BX = 001Ah

Return: AX = packet size with preamble
   CX = IPX retry count

Note:  this function is supported on file servers only under v2.15; v3.02 also
     supports it on workstations

See Also: BX=000Dh