On Mon, 6 Oct 1997, Gerard Gerritsen wrote:

> Hello everybody,
>
> I am trying to interface a 16C84 to a parallel port, and sending data
> from the pc to the pic works fine.
>
> But when it comes from sending data from the pic to the pc things go
> wrong horribly. I've written a small program that reads port 0x378 in
> a loop and prints any data right on to the screen, but the parallel
> does not recognize a high level signal ( 3.45 volt )
>
> Any idea about what to do ? Am I forgetting something in the pic

The i/o lines on the standard parallel port are all unidirectional, so make
 sure your signal is connected to an input line.  Also, some of the lines
 have inverted logic (low reads high, high reads low).

Steve

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