Re: Help with cnmagic

[Eduardo Horvath <eeh%NetBSD.org@localhost>]

On Thu, 8 Sep 2011, Eduardo Horvath wrote:

> On Wed, 7 Sep 2011, Paul Goyette wrote:
> 
> > Looking at my system, I find
> > 
> >     {106} sysctl hw.cnmagic
> >     hw.cnmagic = \x27\x02
> >     {107}
> > 
> > > From the description in cnmagic(9) this would appear to mean that I need 
> > to type a Nul character to enter the debugger.  I'm not at all sure how I
> > would type a Nul on my USB keyboard.
> 
> This is not the Nul character, it's been escaped.  You need to type a key 
> with the value "0x02", whatever that maps to, assuming the console driver 
> is wired into the cnmagic logic.

Sorry, looking more closely, it is the Nul character.

This means it has probably not been initialized.  Since drivers that use 
this are responsible to initialize the magic sequence to sane values, it's 
likely that the console device is not using the cn_magic code.

Eduardo