OSDev.org

I just finished coding PCI headers. ( http://wiki.osdev.org/PCI ).

When I try my code on real hardware, it finds an IDE, but not on qemu. why is that?

This has been solved on IRC, the issue was with the OP not checking sub-functions for each device
On Qemu, the IDE controller is usually function index 1 of one of the devices (0:1:1 for me)