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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Received on Sat Feb 09 2002 - 11:12:43 GMT