> 
> Thank you for the link. 
> Nevertheless the problem do not disappear. 
> I can set halt to the value 1 or 2, but 
> after the booting of NetBSD it is reset to 0. 
>

are on these machines the values also stored 
in some sort of battery backed memory?

may it be that your battery is close to dead?

this shoud not influence reboots w.out power 
cycling, but on other systems very odd behaviour
of old batteries with associated very odd
side effects have been observed...


cheers
Stephan