--- MLH <MLH@goathill.org> wrote: > On 1 Sep 2003 03:00:01 -0500,
Richard Rauch wrote:
> > Re. http://mail-index.netbsd.org/netbsd-help/2003/08/31/0001.html
> ... 
> > I'm told that the problem is in the way the parallel port requires
> > interrupts to be handled, which doesn't work well with what NetBSD
> > would like to believe.  (^&
> ... 
> > You might also get some improvements by changing the driver between
> > interrupt-driven and interrupt-less mode.  (It's a minor mode on
> the
> > /dev node.  I think that NetBSD now ships with /dev/lpa as the
> > interrupt-less counterpart to /dev/lpt.  I think that the
> interrupt-
> > driven one performs less well.)
> 
> However, understand that using /dev/lpa may not work correctly with
> certain printers. I've seen a few that simply print the what was
> left in the printer's buffer after it overran when using lpa.
>

This is probably because the driver does not wait for nACK (the
acknowledge pulsed signal, which would otherwise trigger an interrupt).
The driver just waits for printer to be not busy instead.

______________________________________________________________________ 
Post your free ad now! http://personals.yahoo.ca