- Talk about chips rather than chip sets as AMD LANCE and PCnet are   single-chip. - Add some more rationale about le(4). - Add/un-comment hardware notes for C-Bus and ISA adapters.
- Talk about chips rather than chip sets as AMD LANCE and PCnet are
  single-chip.
- Add some more rationale about le(4).
- Add/un-comment hardware notes for C-Bus and ISA adapters.

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