>>>Are you using the interrupting parallel port driver?  (lpt0).  If so, then
>>>use the polled parallel port driver.  AFIAK, no i386-based Unix has a
>>>working interrupt-driven parallel port driver (I'm pretty sure the Linux
>>>and FreeBSD ones are all polled).  If I'm wrong, I'd love to hear about
>>>it!
>>
>>   Our "lpt" driver can be configured either way - interrupt or polled.
>
>Err, I did specify "working" :-) (You can configure the NetBSD one either way
>as well) Does the FreeBSD interrupting lpt driver work in all cases?  The
>last time this came up Bruce Evans joined in the discussion, and I was
>under the impression that the FreeBSD lpt driver had the same sort of
>problems.  If this is wrong, please correct me.

   I'm not aware of any bugs in it, and I haven't seen any bug reports relating
to problems with it in interrupt or polled mode. To the best of my knowledge,
it works fine for everyone who has used it.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project