25 May
2005
25 May
'05
6:22 p.m.
Heh, so I just discovered. The parallel port lines up
with what's
labelled as Serial port A on the back of the case :-(
Luckily I don't think I've destroyed any
serial hardware on the PC I
was using as a terminal!
That is not entirely coincidence. Serial ports are supposed to have
enough impedence that you can apply any voltage in some wide range like
?25V (relative to ground) to any pin or combination of pins without
damage. Certainly well beyond anything a parallel port is going to
produce.
Of course, lots of peecee makers ignore the spec in other ways, so they
might ignore it in this repsect too...but at least it's _supposed_ to
be able to survive such treatment.
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