Hello,

I'm currently doing some parallel port programming. I would usually ask the user to enter the base address of the parallel port. Is there a way to write some C code that can find this out,  instead of having the user input it?

thanks.

I'm not sure if I understand you correctly but in linux you should normally read/write to /dev/lp0 and NOT mess with the the base address of your parallel port. The kernel should detect your base adress correctly it is really uncommon for a unix/linux application to deal wit this sort of stuff.

Okay, so if the kernel detects the base address, how do I get it from the kernel? I'm notfamiliar with using /dev/* for outputs. This seems a bit hard as I do alot of bitwise operations an I need access to the base port, base port+1, and base port+2.
I use ioperm() to setup relevant permissions. and inb() anf outb() for reading and writing.

I've heard that another way that I could find the base address is to search /proc/ioports. But I'm not sure how to implement this in C.