In a message dated 98-01-24 23:43:19 EST, you write:

<<
 I've seen lots about '485 stuff around her lately.  One recent posting
 almost made it sound as though there are driver / interface chips for this
 interface.  The same post made it sound that '485 is strictly a physical
 spec, and leaves software protocol undefined.

 Is this correct?  Does anyone have any WWW links that I might do more
 research?

 Thanks,
 Mitch >>
Maxim makes a bunch.  We use the MAX485

Dave