> Chris Tribo writes:
>
> >    If memory serves, this is not a crash. When you power off a terminal
it
> >usually will sent a "break" "signal" to the computer it's attached to.
That
>
> IIRC, the terminal does not explicitly send a break on power-off
> but it's rather either hazards on the line when the power goes away
> or generally the drop of power that is, from the vax side,
> indistinguishable from a break signal.

In the Sun3 world, disconnecting the serial console halts to the ROM,
because floating means "0" and continuous streams of 0's means "BREAK".
There is an old hack for Sun3 consisting of putting a pull-up resistor on
RX, so that it never floats.
However, some terminals sends a real BREAK before dying, so you need to
disconnect them before you shut them down, even with the pull-up resistor.

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