Peter, do you have any docs on that I/O card? I've been doing
bidirectional parallel I/O for a few years and never had any problems.
If the card is configured for EPP, change it back to a basic parallel
port. You already know about the control register Bit.

   - Tom

At 03:04 PM 7/24/98 +0000, Peter wrote:
>Hello,
>
>  sorry to bother the list, but i have a small problem. i'm using a garden
>variety multi-IO card's printer port to interface to a project
>(PIC-based), and I'm now tinkering with the driver. I need to turn the
>port to input but I can't. The usual way does not work (control register
>bit).
>
>  I've got no clue whether it's EPP or such. It is bidirectional, I can
>read back an output value, but I do not dare to send my data against the
>30 mA + short circuit current output by the port (measured).
>
>NOTE: There are no BIOS settings to be set, and no jumpers. I'm using some
>DOS or other and direct register IO in C and assembly.
>
>  Anyone who has a clue, before I go digging into my books, please help.
>
>thanks,
>
>        Peter
>
>