On Nov 12, 2011, at 11:29 AM, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
  On Sat, 12 Nov 2011 09:48:40 +0100
 Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
  [connect FPGA PDP-11 to Ethernet]
  So there too is a bit of a challenge - which
situation to build the VHDL for? 
 ENC28J60 Stand-Alone Ethernet Controller with SPI
Interface:
 
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en022889  Just found an
other thing in that category: W5300 from
 
http://www.wiznet.co.kr/
 It is used on this 
http://homepage.mac.com/dgcx/pdp10x/ FPGA PDP-10. 
  Can you get to raw Ethernet frames on the W5300?  I haven't (yet) designed with it,
but it seems it does IP only, and doesn't expose raw Ethernet to the host interface.
That would make it a poor choice for machines that often want to run, say, DECnet.
             -Dave
--
Dave McGuire
New Kensington, PA