programming parrallel port input/output
Hello all. I hope that this isn't an easy one for you all as I have looked long and hard on the internet and the book stores and not found my answer. I used to program my parrallel port to take input and send output to relays to control motors and etc. put since the older computers I used to use are out of commission now and I have tried moving the software to newer computers with no luck.
I used inline Assembly in a C program. I used to use windows 98 on pentium 1 or 2 processors now I'm on to windows XP Home and PRO with Pentium 4 processors, but the software comes up with errors and rewriting code or even just recompiling is full of error messages too. The Messages have a vague verbal explanation, but I think I have isolated the problem or one of them. When the new computers boot up there is power already on several of the pins of the parrallel port, not present on the old computers. Maybe Windows or the BIOS has already taken over control of the Port and I need to turn it off somehow?? Any Ideas would be gratifully appreciated as this simple hold up has fouled a huge project. Thanks You all. ~Mat