According to the pocket reference it means that the
"monitor present" signal
has not been seen.
OK, found it.. There's a pin on the DA15 connctor that is wired to an
input port. It is grounded by the monitor/monitor cable.
Is it jsut me, or is this the mst stupid feature imaginable? You
gneerally know if the monitor isn't there, and to reprot the fact by
displayign an error message on the monitor is pointless. But worse than
that, the VT240 has a composite video output on a BNC socket (it carries
the same signal as the monochrome vidoe output on the DA15). aas there's
a 4p4c fro the keyboard o nthe VT240 main box too, you could run it with
any composite monitor -- but you'd get this error unless you plugged a
DA15 socket in wit ha suitable shorting link.
And yet you say that even with this error the termianl works perfectly.
So what's the point of it?
I suspect when I clean up/test my VT240 I'll solder a little jumper rie
on the logic board to disable this 'feature'...
-tony