On Fri, May 16, 2003 at 11:26:12PM +0930, Brett Lymn wrote:
> On Fri, May 16, 2003 at 02:16:40PM +0100, Greg Matthews wrote:
> > 
> > On Fri, 2003-05-16 at 13:26, Marianne Spiller wrote:
> > >   all kind of Sun hardware? Or only older machines (like my classic)?
> > > 
> > 
> > hmmm... wouldnt like to say, maybe another lister would have more
> > authority...?
> >
> 
> By default, all Sun machines will drop to the OBP if a break is sent
> to the serial console.  I believe that later machines allow you to
> change the sequence to something less likely to occur (note, this
> quite a new feature iirc).  
> 
> One method of avoiding inadvertant breaks when the terminal is powered
> off is to put a resistor between the rx pin and dsr on the end of the
> cable that plugs into the sun.  The idea is to ensure the rx is pulled
> to the "idle" state if the power on the terminal goes away - in rs232
> idle happens to be a logic "high".

Does this still allow deliberate breaks through?

>  
> -- 
> Brett Lymn
>