Someone else mentioned the bpp driver, which is a good place to start.  There
   is some technical data on the bpp device in the Tadpole 3GX hardware manual. 
   Take a look in the archives for the location of that.


there is full documentation for this in the "FEPS" doco (fast ethernet, parallel
& scsi IC that implements the hme, bpp & fas [FAS366] devices):

	http://www.sun.com/microelectronics/manuals/STP2002QFP-UG.pdf


i believe this IC is present on ultra2 systems.


.mrg.