For starters try:

www.2xtreme.net/dage/parport.html



includes enough to get you into trouble and even a cute little led tester
and qbasic prg.

Greg




>Hello,
>
>-- Warning --
>-- Stupid question following below =)
>
>Looking for someone with good knowledge of the PC's parallel port, new and
>old computers.
>
>I am trying to interface to the parallel port, and I am having no luck -
>absolutely none.
>
>Here is what I am starting with for knowledge (assumptions?):
>
>1) Outputs are open collector type.
>2) Pin configuration of the port.
>
>Now some places (I.e. a certain parallel port FAQ at
>http://www.lvr.com/files/ibmlpt.txt) will tell me that the outputs are TTL.
>
>Here's where I noticed that I'm not able to get it to work properly.  I
>tried to connect the port to a 74LS05 (Inverter) and the output and inputs
>to this chip are something like 1.3V. Total garbage.  Regardless of the
>port's state.  I do believe that the software I'm using to toggle all of the
>outputs on the port is correct.
>
>Any ideas???
>
>Thanks,
>
>Wade
>
>--
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--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
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