Granted, one problem is how fast the data transfer is through the
parallel
port, that would limit how many samples/second the system could process.

I think a parallel port is easily fast enough for this application


Almost forgot... WIN XP and WIN2000 make getting to the parallel port
for
something like this MUCH more difficult then it was under WIN 98.

True enough. I had this problem with a different project. There's a
shareware driver available which helps access the parallel port under XP
etc. See http://www.hanssummers.com/electroni...trix/index.htm for
details of how it works.

Hans G0UPL
http://www.hanssummers.com