> Hi. 
> 
> Today I got:
> ?04 ISP ERR
>         PC = 800002B
> and a immediate reboot when I was editing a file with vi on my MV4k200.
> Kernel was 1.6N, userland 1.6. What is this "ISP ERR"? 
> 
That means that the interrupt stack is invalid, så there is nothing
the machine can do about it than to halt. It cannot give an interrupt
because it cannot save the current status and PC etc.

It's usually simple to see what has gone wrong when this occurs; you
end up at the >>> and everything is available from there.

-- Ragge