You probably need a copy of the book "Parallel Port Complete", it explains
what can be done with all the versions of teh parallel port, and shows
how to program it from Visual Basic.
No, I dont happen to have a copy. I read Serial Port Complete once, I
imagine its very similar.
-Lawrence LeMay
This question might be somewhat OT.
I'm currently making a little interface comprised of 4 TTL IC's to let
my
punchcard reader work with a PC (Linux). I think I have the interface
made as
much close as possible with regards to the signals generated by the card
reader,
but I need some info on the parallel port itself.
I have searched the web, but not all my question are answerd with
regards to
the possible usage of the control and status signals.
What I need to know is if all the control signals can be controlled from
a program (not sure if it will be a kernel device driver or a user
driver).
If so, I have better control over the reader, if not, it may make the
interface
a bit more complicated.
BTW, the program will most likely use the parallel port in EPP mode, not
in ECP mode.
The reader is a CR11 aka the Documentation M200, and I found the user
manual with
very usable schematics on
www.pdp8.net.
I was also fortunately to find a supplier for the connector at the back,
so I
didn't have to change anything of it's orginality.
Thanks,
Ed
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