exactly. though, hitting the halt button will also drop you to the console,
and doesnt depend on anything in the kernel working correctly.. 
after that, one should examine the stack pointer, figure out what the
frame should look like to imitate a proper entry into ddb, make such a 
frame, set the fp and the sp properly, set the pc for a jump into it, and 
go for it. with the proper incantations, one shoudl find oneself running 
in ddb, at least enough to see what was going on. 

isildur

On Tue, 20 Nov 2001, Chris Tribo wrote:

> 
> 
>     He is suggesting that you drop to the PROM console, not to be confused
> with the NetBSD console. Hitting Cntrl-Alt-Enter will drop you to the PROM
> console. However, I seem to remember seeing a commit not too long ago where
> someone disabled hitting Do dropping you into the debugger. The last time I
> tried it, it kernel paniced my MAXine and I gave up on it. Does Do still
> work to get into ddb on 1.5.2? I don't have the source handy to check.
> 
>     Chris
> 
> > no, im not suggesting modify the console driver, im suggesting that as a
> > last resort if you need to get into ddb and cant because the kernel
> > won't respond, drop to the console and fudge your way into ddb. if you
> make
> > a sufficiently correct stack frame for the entry, then it should be of
> > some use to you.
> > Isildur
> 
> 
>