Date: Mon, 18 Aug 1997 10:52:34 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: grog@lemis.com (Greg Lehey) Cc: msmith@atrad.adelaide.edu.au, phk@critter.dk.tfs.com, Nicolas.Souchu@prism.uvsq.fr, freebsd-hackers@FreeBSD.ORG, freebsd-hardware@FreeBSD.ORG Subject: Re: Parallel port developpements - ppbus Message-ID: <199708180122.KAA08379@genesis.atrad.adelaide.edu.au> In-Reply-To: <19970818080055.00098@lemis.com> from Greg Lehey at "Aug 18, 97 08:00:55 am"
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Greg Lehey stands accused of saying:
> >>
> >> Come on guys... PLIP is so simple as it can be... I don't have the time
> >> at this point to go back and kick PLIP again...
> >
> > If it's really that simple; where can I find some documentation on
> > it?
>
> Would you believe lp(4)? It's one of the best interface man pages in
> the section.
Eep, frightening.
> > Is it likely to work on a port that's open to shared use?
>
> Of course! In fact, you can print and transfer data at the same time :-)
Really? From lp(4) :
Initially, the lpt device is active for printing and the network inter-
face is inactive; however, once the corresponding lp device has been con-
figured 'up' with ifconfig(8) printing is disabled until the network in-
terface is configured 'down'.
That's OK though; in this case I merely needed to know whether the if_lp
driver should obtain an exclusive lock on the port hardware. It'll let you
tie yourself in some interesting knots, of course 8)
> Greg
--
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