  In order to interface the DESY fieldbus adapter, SEDAC (SErial Data
Acquisition and Control system), a full duplex device driver was developed for
the Windows NT, Linux, VxWorks, and Solaris operating systems. Detailed driver
development issues as well as a common user interface will be presented, along
with a comparison of the device drivers among the different operating systems.
In particular, we shall present benchmark results concerning general
performance as well as ease of development.
