experimental networking drivers for amd pcnet / 79c973 (PCI) and intel eepro 10 / i82595 (ISA) available

[Till Straumann]

Hi - FYI:

I ported the freebsd 'pcn' and 'ex' drivers to RTEMS

- 'ex' supports the (quite old) intel 'eepro 10' / i82595 chip.
  Board-level support only for pc586 BSP and ISA cards
  implemented.

- 'pcn' supports the AMD 'pcnet' chip based PCI cards
  (79c973 + similar). I fixed endianness issues and made
  it work on powerpc ('shared' + derived BSPs). Should
  also work on pc586 [maybe with minor mods to accommodate
  for differences in PCI and IRQ APIs].

- I had begun porting 'lnc' but then realized that 'pcn' was
  what I wanted. I abandoned 'lnc' due to address space
  restrictions. If someone needs to support the original
  'lance' chip - I have at least something to get you started...

HTH
-- Till