INT 7A U - Novell NetWare - IPX Driver - internal - GET DRIVER PACKT SIZE LIMIT
        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
SeeAlso: BX=000Dh

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