Changes from Denny Gentry <denny1@home.com>:

Changes from Denny Gentry <denny1@home.com>:
Change in the way receive buffer areas are handled.  Before we gave
the chip 16 buffers, each 1536 bytes (big enough for one packet).
Now we're handing the chip 8 buffers, each 4 Kbytes, and letting
the chip fit as many packets as it can in each one.  This should
help keep it from running out of buffer space.  Also make some of
the performance-crucial routines inline.  It made no measurable
difference except to make me feel better