Re: OT -> bit twiddling on a parallel port?

Sounds like this guy doesn't understand the parallel port...

IIRC, the parallel port, like almost is anything else on the computer,
is entirely digital; i.e. you can set it on, or off, but on or off are
predefined voltages (within tolerances), and I can't remember hearing
anything about setting voltages on a parallel port, let alone
individual pins.

You might have a look at these and see if there's something I missed...
http://www.repairfaq.org/filipg/LINK/PORTS/F_PARALLEL1.html
http://www.tkk.fi/Misc/Electronics/circuits/lptpower.html

On 7/19/05, Mac Mason <mac@cs.hmc.edu> wrote:
> So, I got an interesting question the other day. I know a guy who wants t=
o
> programatically set the voltages on individual pins on a parallel port. (=
IE,
> have a command for "set pin 5 to 2 volts" or "set pin 7 to 1 volt".
> He wants to do this in windows, but I'm having no luck figuring this out =
on
> any platform...
>=20
> Ideas?
>=20
> --Mac
>=20
> --
> Julian "Mac" Mason mac@cs.hmc.edu
> Computer Science '06 (310)-882-8068
> Harvey Mudd College
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Received on Tue Jul 19 22:22:03 2005