Is there any references or documentation on the  best method of adding
a kernal level device  driver to netbsd?  I  would like to try and add
something which  commicates  over the   pci   bus to  the kernal   and
eventually a  user level process.   Im interested in character, block,
and any other driver  types which  might be  useful.  Is there  a good
example set  of code which  sort of serves as the  best model?  I have
both Susan Egan's and McKusick's reference.

Thanks in advance,

marc