I have a Backpack CDRW drive on my parport, and I am looking to develop
an externally powered TTL circuit to do some stuff (fire a laser diode,
signal a HeNe laser power supply, and host a few photosensors).
Is there anything special I need to do to talk through the Backpack, or
to keep from tripping over it?
Can someone provide a link to some parport programming examples dealing
with TTL circuits? In another life, I did it under DOS, but this is my
first need for this sort of thing under Linux.
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