3C503 & Shared Memory

I have a 3C503-16 ethernet card in a 486-50 running Linux 2.0.27.  The networking works fine, but slow, when I jumper the card to disable shared memory.  However, if I enable shared memory, I get a stream of Bogus Packet error messages.  It does not matter what the shared memory address is.

I do not believe there are any conflicts in the computer.  Any ideas about how to be able to use Shared Memory on the ethernet card?
keane021997Asked:
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xtermCommented:
         eth0: bogus packet size, status = NNNN
          kmalloc called with impossibly large argument (65400)
          eth0: Couldn't allocate sk_buff of size 65400
          eth0: receiver overrun

  Reason: There is a shared memory problem.

  Solution: If the problem is sporadic, you have hardware problems.
  Typical problems that are easy to fix are board conflicts, having
  cache or `shadow ROM' enabled for that region, or running your bus
  faster than 8Mhz. There are also a surprising number of memory
  failures on ethernet cards, so run a diagnostic program if you have
  one for your ethercard.

  If the problem is continual, and you have have to reboot to fix the
  problem, record the boot-time probe message and mail it to
  becker@cesdis.gsfc.nasa.gov - Take particular note of the shared
  memory location.

I would assume you've already read this... have you mailed
becker?  
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